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1. Vibration, acoustic and emission characteristics of the chlorella vulgaris microalgae oil in compression ignition engine to mitigate environmental pollution

Author:
M. Sangeetha; P. Boomadevi; Amany Salah Khalifa; Kathirvel Brindhadevi; Manigandan Sekar
Source:
Chemosphere 2022 v.293 pp. 133475
ISSN:
0045-6535
Subject:
Chlorella vulgaris; acoustics; aluminum oxide; biodiesel; carbon dioxide; carbon nanotubes; catalysts; combustion; diesel engines; greenhouse gases; microalgae; nitric oxide; oils; petroleum; pollution; prices; vibration
Abstract:
... The petroleum fuel demand with high price and its exhaustion imposes a pressure to find an alternative. The fossil fuel shortage has been deteriorating over the past few years, because of the rapid increase in population. Many attempts have been made to increase the quality of biofuel with additives. In this paper, two types of nanoparticles such as carbon nanotubes (CNT) and alumina (Al₂O₃) in ch ...
DOI:
10.1016/j.chemosphere.2021.133475

2. Artificial neural network modeling of performance, emission, and vibration of a CI engine using alumina nano-catalyst added to diesel-biodiesel blends

Author:
Seyyed Hassan Hosseini; Ahmad Taghizadeh-Alisaraei; Barat Ghobadian; Ahmad Abbaszadeh-Mayvan
Source:
Renewable energy 2020 v.149 pp. 951-961
ISSN:
0960-1481
Subject:
algorithms; aluminum oxide; atmospheric pressure; carbon dioxide; carbon monoxide; catalysts; emissions; energy use and consumption; fuels; gases; hydrocarbons; nanomaterials; neural networks; nitric oxide; oils; oxygen; relative humidity; renewable energy sources; statistical analysis; temperature; torque; vibration; viscosity
Abstract:
... In recent years, added nano-catalysts to fuels has improved their thermo-physical properties. In present study, the alumina as additive with concentrations of 30, 60, and 90 ppm were added to B5 and B10 blends for evaluation of the engine performance, emissions, and vibration levels. An ANN model based on standard back-propagation learning algorithm for the engine was developed. Multi-layer percep ...
DOI:
10.1016/j.renene.2019.10.080

3. Characterization of Pt-based oxidation catalyst – Deactivated simultaneously by sulfur and phosphorus

Author:
Mari Honkanen; Mika Huuhtanen; Marja Kärkkäinen; Tomi Kanerva; Kimmo Lahtonen; Ari Väliheikki; Kauko Kallinen; Riitta L. Keiski; Minnamari Vippola
Source:
Journal of catalysis 2021 v.397 pp. 183-191
ISSN:
0021-9517
Subject:
adsorption; aluminum oxide; aluminum phosphate; carbon monoxide; catalysts; catalytic activity; cerium; nitric oxide; oxidation; phosphorus; platinum; propylene; sulfur; temperature
Abstract:
... Simultaneous poisoning of sulfur + phosphorus on a platinum-based diesel oxidation catalyst was studied to gain a deeper understanding on the catalyst deactivation. Compared to a single poisoning (sulfur or phosphorus), the simultaneous poisoning had a severe effect on the catalyst activation: light-off temperature for 90% conversion of propene was not reached, this of carbon monoxide was much hig ...
DOI:
10.1016/j.jcat.2021.03.026

4. Mechanism of nitrite hydrogenation over Pd/γ-Al2O3 according a rigorous kinetic study

Author:
Pengyu Xu; Shilpa Agarwal; Leon Lefferts
Source:
Journal of catalysis 2020 v.383 pp. 124-134
ISSN:
0021-9517
Subject:
adsorption; aluminum oxide; ammonia; atmospheric pressure; carbon dioxide; catalysts; chemical bonding; dimerization; hydrogen; hydrogenation; mass transfer; nitric oxide; nitrites; nitrogen; pH; palladium; slurries
Abstract:
... The kinetics of nitrite hydrogenation over a Pd/γ-Al₂O₃ catalyst was studied in a semi-batch slurry reactor at atmospheric pressure, in absence of any mass transfer effects. The hydrogen concentration and pH were kept constant during an experiment by continuously flowing a gas mixture containing hydrogen and 10% v/v CO₂. The kinetic experiments were performed in an unprecedented wide concentration ...
DOI:
10.1016/j.jcat.2020.01.003

5. Catalytic effects of CaO, Al2O3, Fe2O3, and red mud on Pteris vittata combustion: Emission, kinetic and ash conversion patterns

Author:
Yueyao Song; Jinwen Hu; Jingyong Liu; Fatih Evrendilek; Musa Buyukada
Source:
Journal of cleaner production 2020 v.252 pp. 119646
ISSN:
0959-6526
Subject:
Fourier transform infrared spectroscopy; Pteris vittata; X-ray fluorescence spectroscopy; activation energy; aluminum; aluminum oxide; biomass; calcium oxide; carbon dioxide; catalysts; catalytic activity; combustion; emissions; enthalpy; ferric oxide; fluorescence; fouling; heat transfer; hydrogen cyanide; melting; nitric oxide; risk reduction; sulfur dioxide; thermogravimetry
Abstract:
... Catalytic effects of red mud (RM), calcium oxide (CaO), aluminum trioxide (Al₂O₃), and ferric oxide (Fe₂O₃) were quantified on the combustion, emission and ash characteristics of aboveground (PA) and belowground (PB) biomass of Pteris vittata using thermogravimetric, Fourier transform infrared, X-ray fluorescence and FactSage analyses. CaO affected the specific formation pathways of tar species an ...
DOI:
10.1016/j.jclepro.2019.119646

6. Experimental and numerical studies on the effect of packed bed length on CO and NOx emissions in a plane-parallel porous combustor

Author:
Junrui Shi; Yongqi Liu; Mingming Mao; Jinsheng Lv; Youtang Wang; Fang He
Source:
Energy 2019 v.181 pp. 250-263
ISSN:
0360-5442
Subject:
air; aluminum oxide; carbon monoxide; combustion; emissions; filtration; nitric oxide; open space; pellets; temperature
Abstract:
... Gas diffusion combustion in a plane-parallel packed bed filled with 2.5 mm alumina pellets is experimentally and numerically investigated. Special attention is focused on the influence of bed length (h) on the CO and NOx emissions for different excess air ratios (α) and gas mixture velocities (ug,in). It is found that h has significant influence on NOx emission when h < 120 mm. NO emission decreas ...
DOI:
10.1016/j.energy.2019.05.141

7. Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS

Author:
Xiaoyan Shi; Yingjie Wang; Yulong Shan; Yunbo Yu; Hong He
Source:
Journal of environmental sciences (China) 2020 v.94 pp. 32-39
ISSN:
1001-0742
Subject:
Bronsted acids; Fourier transform infrared spectroscopy; Lewis acids; aluminum oxide; ammonia; ammonium; catalysts; iron; nitrates; nitric oxide; nitrites; nitrogen dioxide; oxidation; oxygen; silica; temperature
Abstract:
... The surface species formed in the reaction of NO and NO₂ with pre-adsorbed NH₃ over a Fe-ZSM-5 catalyst (1.27 wt.% Fe, SiO₂/Al₂O₃ = 25) at low temperature (140°C) were studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Through using a background spectrum of NH₃-saturated Fe-ZSM-5, we clearly observed the formation of common intermediates resulting from the rea ...
DOI:
10.1016/j.jes.2020.02.029

8. Mechanistic insight into the methanol selective catalytic reduction of NO reaction over Cu-containing perovskites

Author:
Hao Wang; Runduo Zhang; Peixin Li; Sébastien Royer; Jean-Philippe Dacquin
Source:
Journal of catalysis 2019 v.377 pp. 480-493
ISSN:
0021-9517
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; catalysts; catalytic activity; copper; density functional theory; desorption; grinding; hydrogen; iron; methanol; nitrates; nitric oxide; nitrites; physicochemical properties; reaction mechanisms; silver; temperature
Abstract:
... The selective catalytic reduction (SCR) of NO by methanol was studied on LaFe0.8Cu0.2O3, and compared with that on an Ag/Al2O3 reference catalyst. A detailed characterization of the catalyst’s physicochemical properties was carried out by X-ray diffraction, N2 physisorption, H2 temperature-programmed reduction, isotopic exchange experiments, NOads + O2ads temperature-programmed desorption, and X-r ...
DOI:
10.1016/j.jcat.2019.07.035

9. NOx adsorption and desorption of a Mn-incorporated NSR catalyst Pt/Ba/Ce/xMn/γ-Al2O3

Author:
Pan Wang; Dan Yu; Gang Wu; Farhan Sheikh; Junheng Liu
Source:
Environmental science and pollution research international 2019 v.26 no.27 pp. 27888-27896
ISSN:
0944-1344
Subject:
adsorption; aluminum oxide; barium; catalysts; desorption; manganese; nitrates; nitric oxide; nitrites; nitrogen dioxide; oxygen; platinum; pollution; temperature; thermal stability
Abstract:
... This study evaluated the NOₓ adsorption and desorption performance as well as the casual relationship underlying a Mn-incorporated catalyst (Pt/Ba/Ce/xMn/γ-Al₂O₃). NOₓ adsorption and desorption are regarded as a prominent index for the NOₓ removal performance of NOₓ storage and reduction; we utilized NOₓ storage experiments with various inlet NO and O₂ concentrations and cycling adsorption/desorpt ...
DOI:
10.1007/s11356-019-05847-y

10. Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O3 oxidation

Author:
Bin Li; Heng Wu; Xiaolong Liu; Tingyu Zhu; Fagao Liu; Xingting Zhao
Source:
Journal of hazardous materials 2020 v.392 pp. 122270
ISSN:
0304-3894
Subject:
absorbents; absorption; aluminum oxide; aluminum silicates; calcium; calcium carbonate; calcium sulfate; desulfurization; flue gas; nitric oxide; oxidation; ozone; pH; reaction mechanisms; sodium; sulfur dioxide; temperature
Abstract:
... Aiming at SO₂ and NOₓ in industrial flue gas, the simultaneous removal of SO₂ and NOₓ was conducted using red mud as absorbent with O₃ oxidation. The effects of different factors on the desulfurization and denitration efficiency were investigated. The results show that the increase of oxidation temperature is not conducive to the absorption of NOₓ (O₃/NO molar ratio >1). Low concentration of SO₂ p ...
DOI:
10.1016/j.jhazmat.2020.122270

11. Size effect of Pt nanoparticles in acid-assisted soot oxidation in the presence of NO

Author:
Shuting Luo; Xiaodong Wu; Baofang Jin; Shuang Liu; Rui Ran; Zhichun Si; Duan Weng
Source:
Journal of environmental sciences (China) 2020 v.94 pp. 64-71
ISSN:
1001-0742
Subject:
X-ray diffraction; aluminum oxide; ammonia; carbon monoxide; catalysts; catalytic activity; chemical reduction; desorption; nanoparticles; nitric oxide; nitrogen dioxide; oxidation; oxygen; particle size; platinum; soot; spectroscopy; sulfuric acid; thermogravimetry; transmission electron microscopy
Abstract:
... Pt/Al₂O₃ catalysts with mean Pt particle size ranged from 2.7 to 7.1 nm were synthesized by chemical reduction method, and the sulfated counterparts were prepared by impregnation of sulfuric acid. The turnover frequency of platinum for soot oxidation under loose contact conditions in a feed flow containing NO and O₂ are positively correlated with the size of platinum. The sulfated Pt/Al₂O₃ exhibit ...
DOI:
10.1016/j.jes.2020.04.008

12. Superior activity of iron–manganese supported on kaolin for NO abatement at low temperature

Author:
Xiaobo Wang; Jie Zhou; Tong Zhao; Keting Gui; Jia Wang; Hywel R. Thomas
Source:
Journal of environmental sciences (China) 2020 v.88 pp. 237-247
ISSN:
1001-0742
Subject:
Bronsted acids; X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; atomic absorption spectrometry; catalysts; catalytic activity; desorption; diatomaceous earth; energy-dispersive X-ray analysis; iron; kaolin; manganese; nitric oxide; scanning electron microscopy; temperature; thermogravimetry
Abstract:
... A series of Fe–Mn catalysts was prepared using different supports (kaolin, diatomite, and alumina) and used for NO abatement via low-temperature NH3-selective catalytic reduction (SCR). The results showed that 12Fe–10Mn/Kaolin (with the concentration of Fe and Mn 12 and 10wt.%, respectively) exhibited the highest activity, and more than 95.8% NO conversion could be obtained within the wide tempera ...
DOI:
10.1016/j.jes.2019.08.017

13. The influence of fluidized bed co-combustion of cassava rhizome and eucalyptus bark on the combustor performance and time-related physiochemical changes of the bed material

Author:
Vladimir I. Kuprianov; Chhaina Se; Pichet Ninduangdee
Source:
Biomass and bioenergy 2019 v.127 pp. 105250
ISSN:
0961-9534
Subject:
Eucalyptus; X-ray fluorescence spectroscopy; air; aluminum oxide; bark; burning; cassava; combustion; combustion efficiency; emissions; energy; energy-dispersive X-ray analysis; fluidized beds; fuels; hydrocarbons; nitric oxide; pellets; potassium; quartz; rhizomes; sand; scanning electron microscopy
Abstract:
... Pelletized cassava rhizome (base fuel with elevated fuel-N and potassium contents) and high-moisture eucalyptus bark (secondary/reburn fuel) were co-fired in a 200 kW fluidized-bed combustor with a silica sand bed, using fuel staging and reburning techniques to mitigate NO emission. Detailed analyses of (co-)combustion and emission characteristics of the combustor were performed for variable opera ...
DOI:
10.1016/j.biombioe.2019.05.019

14. Conversion of CaTi₁–ₓMnₓO₃–δ-Based Photocatalyst for Photocatalytic Reduction of NO via Structure-Reforming of Ti-Bearing Blast Furnace Slag

Author:
Zhengli Zhang; Huihong Lü; Xiazhang Li; Xiaomao Li; Songlin Ran; Zhiyuan Chen; Yongxiang Yang; Xingrong Wu; Liaosha Li
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.12 pp. 10299-10309
ISSN:
2168-0485
Subject:
aluminum oxide; ammonia; feedstocks; furnaces; hydrochloric acid; leaching; manganese; manganese dioxide; nitric oxide; photocatalysis; photocatalysts; recycling; silicate minerals; silicon; slags; sodium; sodium carbonate; value added; washing; wastes
Abstract:
... In this work, a novel low-cost and robust approach is developed to covert Ti-bearing blast furnace slag (Ti-slag) to the main feed stock of photoassisted NH₃ selective catalytic reduction (Photo NH₃-SCR) of NO with high performance. The CaTi₁–ₓMnₓO₃₋δ catalyst was directly extracted from the Ti-bearing slag with MnO₂ in situ modification and Na₂CO₃ reformation followed by dilute hydrochloric acid ...
DOI:
10.1021/acssuschemeng.9b00097

15. DFT Analysis of the Reaction Mechanism for NH₃-SCR of NOₓ over Mn/γ-Al₂O₃ Catalyst

Author:
Xin Li; Quan Li; Liu Zhong; Zijian Song; Shenghui Yu; Cheng Zhang; Qingyan Fang; Gang Chen
Source:
Journal of physical chemistry 2019 v.123 no.41 pp. 25185-25196
ISSN:
1932-7455
Subject:
Bronsted acids; Lewis acids; aluminum oxide; ammonia; ammonium; catalysts; dehydrogenation; density functional theory; desorption; energy; manganese; nitric oxide; nitrogen; nitrogen dioxide; nitrous oxide; oxidation; oxygen; reaction mechanisms
Abstract:
... The SCR reaction mechanism on the Mn/γ-Al₂O₃ catalyst was studied using density functional theory. The intermediates, energy barriers, and rate-determining steps of N₂, NO₂, and N₂O formation were calculated. It was found that NH₃ could be adsorbed on the Lewis acid sites and participated in the SCR reaction in the form of coordinated NH₃. In addition, NH₃ could also be adsorbed on the Brønsted ac ...
DOI:
10.1021/acs.jpcc.9b06499

16. Effect of Thermal Aging on Local Structure and Three-Way Catalysis of Cu/Al₂O₃

Author:
Hiroshi Yoshida; Taiki Hirakawa; Haruka Oyama; Ren Nakashima; Satoshi Hinokuma; Masato Machida
Source:
Journal of physical chemistry 2019 v.123 no.16 pp. 10469-10476
ISSN:
1932-7455
Subject:
aluminum oxide; catalysts; catalytic activity; copper; cupric oxide; nitric oxide; physical chemistry; surface area; temperature
Abstract:
... Cu supported on Al₂O₃, prepared by impregnation, was thermally aged at different temperatures, and the influence of thermal aging on the local structure, redox behavior of Cu, and catalytic activity for a stoichiometric NO–CO–C₃H₆–O₂ reaction was investigated. Crystalline CuO was mainly formed on Al₂O₃ after thermal aging at ≤700 °C, whereas aging at higher temperatures induced Cu²⁺ incorporation ...
DOI:
10.1021/acs.jpcc.9b01848

17. Effect of alumina and zirconia as binders on the activity of Fe-BEA for NH3-SCR of NO

Author:
Jin Shi; Zihao Zhang; Mingxia Chen; Zhixiang Zhang; Wenfeng Shangguan; Shunchao Gu; Hirano Shin-ichi
Source:
Frontiers of environmental science & engineering 2018 v.12 no.1 pp. 15
ISSN:
2095-2201
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; catalysts; catalytic activity; industrial applications; iron; nitric oxide; oxidation; scanning electron microscopy; temperature
Abstract:
... Fe-BEA catalysts are active for the NH3-SCR of NO. For industrial application, a binder should be added to the Fe-BEA catalysts to make them tightly adhere to the monoliths. The addition of alumina and zirconia as binders to the Fe-BEA led to a different effect on NO conversion. The catalytic activity of the mixed samples was evaluated by the temperature programmed procedure in a flow-reactor syst ...
DOI:
10.1007/s11783-018-1012-4

18. Experimental investigation on the effect of ceramic coating on engine performance and emission characteristics for cleaner production

Author:
S. Mohamed Abbas; A. Elayaperumal
Source:
Journal of cleaner production 2019 v.214 pp. 506-513
ISSN:
0959-6526
Subject:
aluminum oxide; carbon; carbon monoxide; ceramics; coatings; diesel engines; emissions; nitric oxide; smoke; zirconium oxide
Abstract:
... Experimental investigations were carried out to explore the performance and emission characteristics of three cylinder diesel engine with its piston coated with three different ceramic coating materials namely zirconia, zirconia + aluminum oxide (ZrO2 +Al2O3) and fused zirconia (40FZA). The coating process were done through plasma spray coating. Further the experimental results of these three cand ...
DOI:
10.1016/j.jclepro.2018.12.040

19. Fe₂O₃–CeO₂@Al₂O₃ Nanoarrays on Al-Mesh as SO₂-Tolerant Monolith Catalysts for NOₓ Reduction by NH₃

Author:
Lupeng Han; Min Gao; Chong Feng; Liyi Shi; Dengsong Zhang
Source:
Environmental science & technology 2019 v.53 no.10 pp. 5946-5956
ISSN:
1520-5851
Subject:
active oxygen species; aluminum oxide; ammonia; ammonium; catalysts; ceric oxide; ferric oxide; iron; nitrates; nitric oxide; nitrites; nitrogen; oxidation; oxygen; steam; sulfates; sulfur dioxide; temperature
Abstract:
... Currently, selective catalytic reduction of NOₓ with NH₃ in the presence of SO₂ is still challenging at low temperatures (<300 °C). In this study, enhanced NOₓ reduction was achieved over a SO₂-tolerant Fe-based monolith catalyst, which was originally developed through in situ construction of Al₂O₃ nanoarrays (na-Al₂O₃) on the monolithic Al-mesh by a steam oxidation method followed by anchoring Fe ...
DOI:
10.1021/acs.est.9b01217

20. Impact of Preparation Method and Hydrothermal Aging on Particle Size Distribution of Pt/γ-Al₂O₃ and Its Performance in CO and NO Oxidation

Author:
E. Ogel; M. Casapu; D. E. Doronkin; R. Popescu; H. Störmer; C. Mechler; G. Marzun; S. Barcikowski; M. Türk; J.-D. Grunwaldt
Source:
Journal of physical chemistry 2019 v.123 no.9 pp. 5433-5446
ISSN:
1932-7455
Subject:
X-ray absorption spectroscopy; X-ray diffraction; aluminum oxide; carbon monoxide; catalysts; catalytic activity; chlorine; liquids; nanoparticles; nitric oxide; nitrogen; oxidation; particle size distribution; physical chemistry; pyrolysis; temperature; thermal stability; transmission electron microscopy
Abstract:
... The influence of the preparation method and the corresponding particle size distribution on the hydrothermal deactivation behavior at 600–800 °C and performance during CO/NO oxidation was systematically investigated for a series of Pt/Al₂O₃ catalysts. Representative conventional (incipient wetness impregnation) and advanced preparation methods (flame spray pyrolysis, supercritical fluid reactive d ...
DOI:
10.1021/acs.jpcc.8b11065

21. Influence of aluminum oxide nanoparticle with different particle sizes on the working attributes of diesel engine fueled with blends of diesel and waste plastic oil

Author:
Chenniappan Chinnasamy; Palanisamy Tamilselvam; Rajamanickam Ranjith
Source:
Environmental science and pollution research international 2019 v.26 no.29 pp. 29962-29977
ISSN:
0944-1344
Subject:
aluminum oxide; carbon monoxide; catalytic activity; combustion; diesel engines; emissions; energy use and consumption; heat; hydrocarbons; nanoparticles; nitric oxide; oils; opacity; particle size; smoke; ultrasonics; wastes
Abstract:
... In the present work, an experimental investigation was conducted to study the influence of adding aluminum oxide nanoparticles (Al₂O₃) with different average particle sizes as additive to blends of diesel and waste plastic oil (WPO) on performance, emission, and combustion attributes of single-cylinder diesel engine operated at a constant speed. Two samples of Al₂O₃ nanoparticle with average parti ...
DOI:
10.1007/s11356-019-06139-1

22. Insights into the precursor effect on the surface structure of γ-Al2O3 and NO + CO catalytic performance of CO-pretreated CuO/MnOx/γ-Al2O3 catalysts

Author:
Xiuwen Wang; Yiyang Lu; Wei Tan; Annai Liu; Jiawei Ji; Haiqin Wan; Chuanzhi Sun; Changjin Tang; Lin Dong
Source:
Journal of colloid and interface science 2019 v.554 pp. 611-618
ISSN:
0021-9797
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acetates; aluminum oxide; carbon monoxide; catalysts; catalytic activity; copper; cupric oxide; dissociation; manganese; manganese monoxide; nitrates; nitric oxide
Abstract:
... NO reduction by CO was investigated over CO-pretreated CuO/MnOx/γ-Al2O3 catalysts with different metal precursors (nitrate and acetate). It was found that the catalyst prepared from acetate salts (Cu/Mn/Al-A) exhibited significantly higher activity than counterpart catalyst from nitrate precursors (Cu/Mn/Al-N). XRD, XPS and in situ DRIFT were carried out to approach the nature for the different ca ...
DOI:
10.1016/j.jcis.2019.07.039

23. Metal Oxides as Catalysts and Adsorbents in Ozone Oxidation of NOₓ

Author:
Kalev Erme; Indrek Jõgi
Source:
Environmental science & technology 2019 v.53 no.9 pp. 5266-5271
ISSN:
1520-5851
Subject:
adsorbents; adsorption; aluminum oxide; catalysts; ferric oxide; fuel combustion; gases; nitric oxide; nitrogen; oxygen; ozone; pollutants; powders; temperature; titanium dioxide
Abstract:
... NOₓ represents an important group of pollutants that are formed in fuel combustion. As these pollutants cause significant environmental problems, removal of NOₓ from exhaust gases is necessary. The present study investigated the influence of metal oxide powders on the removal of NOₓ by oxidation with ozone. The aim of the study was to compare the catalytic effect of TiO₂, Al₂O₃, and Fe₂O₃ and to i ...
DOI:
10.1021/acs.est.8b07307

24. NO oxidation over Fe-based catalysts supported on montmorillonite K10, γ-alumina and ZSM-5 with gas-phase H2O2

Author:
Rongji Cui; Suxia Ma; Jie Wang; Shujun Sun
Source:
Chemosphere 2019 v.234 pp. 302-309
ISSN:
0045-6535
Subject:
Bronsted acids; aluminum oxide; catalysts; electron transfer; ferric oxide; gases; hydrogen peroxide; hydroxyl radicals; iron; montmorillonite; nitric oxide; oxidation; reaction mechanisms
Abstract:
... The catalytic gas-phase H₂O₂ oxidation of NO was achieved over Fe-based catalysts supported on montmorillonite K10, γ-alumina and ZSM-5. ESR tests illustrate that the three catalysts can catalyze decomposition of H₂O₂ yielding highly reactive hydroxyl radicals, of which Fe/K10 has the fastest rate, followed by Fe/γ-alumina. Fe³⁺ in Fe/K10 and Fe/γ-alumina show lower density of electron cloud due t ...
DOI:
10.1016/j.chemosphere.2019.06.029

25. NOₓ Oxidation and Storage Properties of a Ruddlesden–Popper-Type Sr₃Fe₂O₇₋δ-Layered Perovskite Catalyst

Author:
Kazuki Tamai; Saburo Hosokawa; Hiroshi Okamoto; Hiroyuki Asakura; Kentaro Teramura; Tsunehiro Tanaka
Source:
ACS applied materials & interfaces 2019 v.11 no.30 pp. 26985-26993
ISSN:
1944-8252
Subject:
adsorption; aluminum oxide; automobiles; barium; carbon dioxide; catalysts; desorption; heat tolerance; hydrogen; nitric oxide; oxidation; oxygen; palladium; platinum; reducing agents; reflectance; sulfur oxides; temperature
Abstract:
... The development of NOₓ-trapping catalysts for automobiles is highly desired to meet the current strict exhaust emission regulations. This study demonstrates that NOₓ oxidation and storage reactions proceed over Pt-free Sr₃Fe₂O₇₋δ with a Ruddlesden–Popper-type layered perovskite structure. Two types of Sr–Fe perovskite with oxygen storage capacity, namely, SrFeO₃₋δ and Sr₃Fe₂O₇₋δ, are studied as NO ...
DOI:
10.1021/acsami.9b08139

26. Non‐thermal plasma‐assisted catalytic oxidation of NO in a dielectric barrier discharge reactor packed with MOx/Al2O3 (M = Mn or Co) as catalysts

Author:
Jiangen Wang; Honghong Yi; Xiaolong Tang
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.10 pp. 3180-3189
ISSN:
0268-2575
Subject:
Fourier transform infrared spectroscopy; aluminum oxide; catalysts; catalytic activity; chemical interactions; cobalt; cobalt oxide; desorption; energy density; manganese; manganese oxides; nitrates; nitric oxide; nitrogen dioxide; nitrous oxide; oxidation; value added
Abstract:
... BACKGROUND: Plasma catalysis has emerged as a powerful tool in converting a gas or gas mixture into other value‐added or environment‐friendly chemicals. However, a substantial research effort is needed to further understand the physical and chemical interactions between plasma and catalysts, and their contribution to the chemical reactions. RESULTS: For a given energy density (ED) of 535 ± 25 J L⁻ ...
DOI:
10.1002/jctb.6125

27. Novel Low-Cost Simultaneous Removal of NO and SO₂ with ·OH from Decomposition of H₂O₂ Catalyzed by Alkali-Magnetic Modified Fly Ash

Author:
Bingchuan Yang; Suxia Ma; Rongji Cui; Jie Wang; Shujun Sun; Shicheng Li
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.13 pp. 5339-5347
ISSN:
1520-5045
Subject:
X-ray diffraction; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; aluminum oxide; calcium hydroxide; catalysts; coal; denitrification; desulfurization; ferric oxide; fly ash; furnaces; gasification; hydrogen peroxide; hydroxyl radicals; magnetism; nitric oxide; particle size; prices; process design; reaction mechanisms; scanning electron microscopy; silica; sulfur dioxide; temperature; ultrasonics
Abstract:
... An iron-based catalyst with excellent performance and low price was used for simultaneous removal of SO₂ and NOₓ in a typical Fenton system. The catalyst was developed from fly ash of pulverized coal furnace by alkali-magnetic modification process. In other words, the raw fly ash was first modified by Ca(OH)₂, which destroyed the vitreous shell and made the internal substances such as Al₂O₃, SiO₂, ...
DOI:
10.1021/acs.iecr.9b01014

28. Process Intensification in Nitric Acid Plants by Catalytic Oxidation of Nitric Oxide

Author:
Carlos A. Grande; Kari Anne Andreassen; Jasmina H. Cavka; David Waller; Odd-Arne Lorentsen; Halvor Øien; Hans-Jörg Zander; Stephen Poulston; Sonia García; Deena Modeshia
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.31 pp. 10180-10186
ISSN:
1520-5045
Subject:
aluminum oxide; capital; catalysts; cost effectiveness; ecosystem services; heat recovery; nitric acid; nitric oxide; nitrogen dioxide; oxidation; process design; steam; temperature
Abstract:
... We have evaluated the kinetics of the catalytic oxidation of NO to NO₂ using a Pt/alumina catalyst, under conditions relevant to industrial nitric acid production: NO and steam contents up to 5% and 20%, respectively, with temperatures from 250 to 350 °C, and pressures up to 4.7 bar. The objective is to replace the current homogeneous oxidation process, which requires cooling of the process gas an ...
DOI:
10.1021/acs.iecr.8b01483

29. Simultaneous Desulfurization and Denitrification on the SAPO-34@Al₂O₃ Core–Shell Structure Adsorbent

Author:
Honghong Yi; Kun Yang; Xiaolong Tang; Shunzheng Zhao; Fengyu Gao; Yonghai Huang; Zhongyu Yang; Jiangen Wang; Yiran Shi; Xizhou Xie
Source:
Energy & fuels 2018 v.32 no.11 pp. 11694-11700
ISSN:
1520-5029
Subject:
adsorbents; adsorption; aluminum oxide; denitrification; desulfurization; fuels; manganese oxides; nitrates; nitric oxide; nitrogen dioxide; sulfates; sulfur dioxide; surface area
Abstract:
... The SAPO-34@Al₂O₃ core–shell structure adsorbent was designed, prepared, and used to simultaneous desulfurization and denitrification. The SAPO-34@Al₂O₃ core–shell structure adsorbent showed better adsorption performance than SAPO-34, Al₂O₃, and SAPO-34 + Al₂O₃ for the core–shell structure. SAPO-34 was wrapped in irregularly shaped Al₂O₃, and the distribution of Al₂O₃ on the surface of SAPO-34 was ...
DOI:
10.1021/acs.energyfuels.8b02847

30. A new route to the shape-controlled synthesis of nano-sized γ-alumina and Ag/γ-alumina for selective catalytic reduction of NO in the presence of propene

Author:
Driss Mrabet; Manh-Hiep Vu; Serge Kaliaguine; Trong-On Do
Source:
Journal of Colloid And Interface Science 2017 v.485 pp. 144-151
ISSN:
0021-9797
Subject:
X-ray diffraction; aluminum oxide; catalysts; catalytic activity; nanocrystals; nanoparticles; nanorods; nanospheres; nitric acid; nitric oxide; oxygen; porosity; propylene; silver; surface area; synergism; synthesis; temperature
Abstract:
... We report a new route for the direct synthesis of γ-alumina nanocrystals with size and shape control in the presence of oleylamine as the capping agent. Their morphology can be controlled from nanospheres to nanorods by simply tuning a proper amount of concentrated nitric acid (67%) in the synthetic mixture. The as-made nanoparticle products after calcination show γ-alumina nano-size with unique p ...
DOI:
10.1016/j.jcis.2016.09.021

31. Effect of precursors on the structure and activity of CuO-CoOx/γ-Al2O3 catalysts for NO reduction by CO

Author:
Lingling Zhang; Xiaojiang Yao; Yiyang Lu; Chuanzhi Sun; Changjin Tang; Fei Gao; Lin Dong
Source:
Journal of colloid and interface science 2018 v.509 pp. 334-345
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetates; aluminum oxide; carbon monoxide; catalysts; catalytic activity; cobalt; cobalt oxide; cupric oxide; models; nitrates; nitric oxide; oxygen; reaction mechanisms; structure-activity relationships; synergism
Abstract:
... Catalytic reduction of NO by CO was studied over a series of CuO-CoOₓ/γ-Al₂O₃ catalysts prepared by co-impregnation with different copper and cobalt precursors (acetate and nitrate) to evaluate the structure–activity relationship. The obtained samples were characterized in detail by means of XRD, LRS, XPS, H₂-TPR and in situ FT-IR technologies. Results indicate that copper oxide is agglomerated wh ...
DOI:
10.1016/j.jcis.2017.09.031

32. Effect of the Metal–Support Interaction on the Adsorption of NO on Pd4/γ-Al2O3: A Density Functional Theory and Natural Bond Orbital Study

Author:
Prates Letícia M.; Ferreira Glaucio B.; Carneiro José W. de M.; de Almeida Wagner B.; T. de M. Cruz Maurício
Source:
The Journal of Physical Chemistry C 2017 v.121 no.26 pp. 14147-14155
ISSN:
1932-7455
Subject:
adsorption; aluminum oxide; cohesion; energy; methodology; models; nitric oxide; oxygen; palladium
Abstract:
... Density functional theory (B3LYP) was employed to analyze the metal–support interaction in a Pd₄ cluster supported on a γ-alumina model (Al₁₄O₂₄H₆) and its effect on the adsorption of a single NO molecule. Our results show that the Pd₄–Al₁₄O₂₄H₆ interaction leads to a reduction in the cohesion energy among palladium atoms, promoting greater dispersion on the γ-alumina surface. NO preferentially ad ...
DOI:
10.1021/acs.jpcc.7b03315

33. Effects of seed particles Al2O3, Al2(SO4)3 and H2SO4 on secondary organic aerosol

Author:
Xiao Zhang; Biwu Chu; Junhua Li; Chaozhi Zhang
Source:
Frontiers of environmental science & engineering 2017 v.11 no.4 pp. 5
ISSN:
2095-2201
Subject:
aerosols; aluminum oxide; ammonia; gases; neutralization; nitric oxide; photooxidation; seeds; sulfates; sulfur dioxide; sulfuric acid; toluene
Abstract:
... Seed particles Al2O₃, Al₂(SO₄)₃ and H₂SO₄ were selected to investigate their effects on secondary aerosol (SA) formation in toluene/NO ₓ photooxidation under sulfur dioxide (SO₂) and ammonia (NH₃). Effect of seed particles on SA formation was related to their acid-base properties and the presence of acid or alkaline gases. Under NH₃-poor condition, SA formation increased with increasing SO₂ concen ...
DOI:
10.1007/s11783-017-0936-4

34. Enhanced Performance of Ceria-Based NOx Reduction Catalysts by Optimal Support Effect

Author:
Chen Junxiao; Chen Yaxin; Zhou Meijuan; Huang Zhiwei; Gao Jiayi; Ma Zhen; Chen Jianmin; Tang Xingfu
Source:
Environmental Science & Technology 2017 v.51 no.1 pp. 473-478
ISSN:
1520-5851
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; ammonia; catalysts; catalytic activity; ceric oxide; environmental protection; nitric oxide; titanium dioxide; transmission electron microscopy; tungsten oxide
Abstract:
... CeO₂-based catalysts have attracted widespread attention in environmental-protection applications, including selective catalytic reduction (SCR) of NO by NH₃, and their catalytic performance is often intimately associated with the supports used. However, the issue of how to choose the supports of such catalysts still remains unresolved. Herein, we systematically study the support effect in SCR ove ...
DOI:
10.1021/acs.est.6b04050

35. Formation of Nitrogen Oxides (N2O, NO, and NO2) in Typical Plasma and Plasma-Catalytic Processes for Air Pollution Control

Author:
Xing Fan; Sijing Kang; Jian Li; Tianle Zhu
Source:
Water, air, and soil pollution 2018 v.229 no.11 pp. 351
ISSN:
0049-6979
Subject:
air pollution control; aluminum oxide; ambient temperature; byproducts; catalysts; methylene chloride; nitric oxide; nitrogen; nitrogen dioxide; nitrous oxide; oxygen
Abstract:
... Effects of discharge power, O₂ content, reaction temperature, catalyst introduction, and presence of NO and dichloromethane (DCM) on the formation of nitrogen oxides (N₂O, NO, and NO₂) by discharge in N₂-O₂ mixture have been systematically investigated using a dielectric barrier discharge (DBD) reactor. Results show that discharge in N₂-O₂ mixture always produces several to hundreds ppm of nitroge ...
DOI:
10.1007/s11270-018-4011-y

36. Local Structures and Catalytic Ammonia Combustion Properties of Copper Oxides and Silver Supported on Aluminum Oxides

Author:
Hinokuma Satoshi; Kawabata Yusuke; Matsuki Shun; Shimanoe Hiroki; Kiritoshi Saaya; Machida Masato
Source:
The Journal of Physical Chemistry C 2017 v.121 no.8 pp. 4188-4196
ISSN:
1932-7455
Subject:
aluminum oxide; ammonia; catalysts; combustion; cupric oxide; nanosilver; nitric oxide; nitrogen; physical chemistry; reaction mechanisms; silver; temperature
Abstract:
... The local structures and catalytic NH₃ combustion properties of copper oxides (CuOₓ) and silver (Ag) catalysts supported on aluminum oxides (Al₂O₃) were studied. In order to achieve high catalytic NH₃ combustion activity and high N₂ (low N₂O/NO) selectivity, the preparation conditions for impregnated binary catalysts were optimized. In comparison with the single CuOₓ/Al₂O₃ and Ag/Al₂O₃, binary CuO ...
DOI:
10.1021/acs.jpcc.6b13024

37. Pt/CeOx/ZrOx/γ-Al2O3 Ternary Mixed Oxide DeNOx Catalyst: Surface Chemistry and NOx Interactions

Author:
Stanislava Andonova; Zehra Aybegüm Ok; Nikola Drenchev; Emrah Ozensoy; Konstantin Hadjiivanov
Source:
Journal of physical chemistry 2018 v.122 no.24 pp. 12850-12863
ISSN:
1932-7455
Subject:
Lewis acids; X-ray diffraction; adsorption; aluminum oxide; catalysts; ceric oxide; desorption; hydrogen; infrared spectroscopy; ions; nitric oxide; oxygen; platinum; temperature; thermal stability
Abstract:
... Surface chemistry and the nature of the adsorbed NOₓ species on a Pt/CeO₂–ZrO₂/Al₂O₃ catalyst were investigated by IR spectroscopy, X-ray diffraction, H₂-temperature programmed reduction, and NOₓ-temperature programmed desorption. Parallel studies were also carried out with benchmark samples such as CeO₂/Al₂O₃, ZrO₂/Al₂O₃, CeO₂–ZrO₂/Al₂O₃ and Pt-supported versions of these materials. All samples w ...
DOI:
10.1021/acs.jpcc.8b03186

38. Selective Catalytic Reduction of NO by NH3 on CeO2–MOx (M = Ti, Si, and Al) Dual Composite Catalysts: Impact of Surface Acidity

Author:
Lei Zhang; Jingfang Sun; Lulu Li; Shumin Ran; Genxiang Li; Chuanjiang Li; Chengyan Ge; Lin Dong
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.2 pp. 490-497
ISSN:
1520-5045
Subject:
X-ray diffraction; acidity; adsorption; aluminum; aluminum oxide; ammonia; catalysts; catalytic activity; ceric oxide; coprecipitation; nitric oxide; process design; silica; silicon; titanium dioxide
Abstract:
... A series of ceria based dual composite oxides were prepared via a co-precipitation method, and we focus on studying the relationships between the catalytic activity and physicochemical properties of ceria based catalysts. It is found that catalytic activity followed the order of CeTi > CeSi > CeAl > pure CeO₂; X-ray diffraction indicates that all the ceria based dual composite oxides were the cubi ...
DOI:
10.1021/acs.iecr.7b03652

39. Selective catalytic reduction of nitric oxide with carbon monoxide over alumina-pellet-supported catalysts in the presence of excess oxygen

Author:
Kaijie Liu; Qingbo Yu; Qin Qin; Chunpeng Wang
Source:
Environmental technology 2018 v.39 no.15 pp. 1878-1885
ISSN:
1479-487X
Subject:
aluminum oxide; carbon monoxide; catalysts; catalytic activity; ceric oxide; cerium; cobalt; cobalt oxide; copper; denitrification; environmental technology; flue gas; manganese; manganese oxides; nitric oxide; oxygen; pellets; poisoning; sulfur; sulfur dioxide; temperature; thermodynamics; water vapor
Abstract:
... Selective catalytic reduction of nitrogen oxides with carbon monoxide (CO-SCR) is a promising technology to remove NOₓ and CO simultaneously from flue gas. The thermodynamic analyses of catalytic process were performed toward four kinds of active metal oxides (CuₓOy, CoₓOy, MnₓOy and CeₓOy). According to the standard Gibbs free-energy changes calculated, Mn had better resistance to oxygen than Cu, ...
DOI:
10.1080/09593330.2017.1341554

40. Adsorption Species Distribution and Multicomponent Adsorption Mechanism of SO2, NO, and CO2 on Commercial Adsorbents

Author:
Luo Lei; Guo Yangyang; Zhu Tingyu; Zheng Yang
Source:
Energy & Fuels 2017 v.31 no.10 pp. 11026-11033
ISSN:
1520-5029
Subject:
activated carbon; adsorbents; adsorption; aluminum oxide; biogeography; carbon dioxide; flue gas; fuels; nitric oxide; oxidation; pollutants; porous media; sulfur dioxide; zeolites
Abstract:
... Adsorption is a commonly used method for gas pollutant removal. The adsorption performances of four commercial adsorbents have been compared in this work through a fixed-bed reactor. The single gas adsorption results show that zeolite is more effective for SO₂, NO, and CO₂ removal among the four adsorbents. SO₂, NO, and CO₂ are mainly monolayer adsorbed on adsorbents. Physically adsorbed SO₂ is th ...
DOI:
10.1021/acs.energyfuels.7b01422

41. Effect of active component addition and support modification on catalytic activity of Ag/Al2O3 for the selective catalytic reduction of NOx by hydrocarbon – A review

Author:
Pavan M. More
Source:
Journal of environmental management 2017 v.188 pp. 43-48
ISSN:
0301-4797
Subject:
aluminum oxide; catalysts; catalytic activity; gold; magnesium oxide; nitric oxide; reducing agents; silver; sulfates; sulfur; synergism
Abstract:
... The effect of active component addition and support modification of Ag/Al2O3 has been reviewed to examine their contribution to HC-SCR of NOx. This review has depicted the possible mechanisms of reduction of NO by hydrocarbon using metal/metal oxide doped Ag/Al2O3. The addition of second metal results in the maximum formation of well dispersed Agnδ+ clusters. Specifically, addition of Au improves ...
DOI:
10.1016/j.jenvman.2016.11.077

42. Effect of added alumina as nano-catalyst to diesel-biodiesel blends on performance and emission characteristics of CI engine

Author:
Seyyed Hassan Hosseini; Ahmad Taghizadeh-Alisaraei; Barat Ghobadian; Ahmad Abbaszadeh-Mayvan
Source:
Energy 2017 v.124 pp. 543-552
ISSN:
0360-5442
Subject:
aluminum oxide; biodiesel; carbon dioxide; carbon monoxide; catalysts; cooking fats and oils; diesel fuel; emissions; energy use and consumption; nanoparticles; nitric oxide; temperature; torque; wastes
Abstract:
... Recent studies affirm that petro-diesel fuel properties vary by adding the biodiesel. In addition, catalysts can mix with these fuels to improve their performance and exhaust emission characteristics. In the present paper, an experimental investigation was conducted to evaluate the effects of the alumina nanoparticles as additive to B5 (95% diesel+5% biodiesel from waste cooking oil) and B10 fuel ...
DOI:
10.1016/j.energy.2017.02.109

43. Effects of Pd doping on N2O formation over Pt/BaO/Al2O3 during NO x storage and reduction process

Author:
Mingxin Dong; Jun Wang; Jinxin Zhu; Jianqiang Wang; Wulin Wang; Meiqing Shen
Source:
Frontiers of environmental science & engineering 2017 v.11 no.6 pp. 11
ISSN:
2095-2201
Subject:
aluminum oxide; ammonia; catalysts; dissociation; greenhouse gases; mixing; nitric oxide; nitrogen; nitrous oxide; ozonosphere; palladium; platinum; reducing agents; temperature
Abstract:
... N₂O is a powerful greenhouse gas and plays an important role in destructing the ozone layer. This present work investigated the effects of Pd doping on N₂O formation over Pt/BaO/Al₂O₃ catalyst. Three types of catalysts, Pt/BaO/Al₂O₃, Pt/Pd mechanical mixing catalyst (Pt/BaO/Al₂O₃ + Pd/Al₂O₃) and Pt-Pd co-impregnation catalyst (Pt-Pd/BaO/Al₂O₃) were prepared by incipient wetness impregnation method ...
DOI:
10.1007/s11783-017-0976-9

44. N2O Formation Characteristics in Dielectric Barrier Discharge Reactor for Environmental Application: Effect of Operating Parameters

Author:
Xiaolong Tang; Jiangen Wang; Honghong Yi; Shunzheng Zhao; Fengyu Gao; Yonghai Huang; Runcao Zhang; Zhongyu Yang
Source:
Energy & fuels 2017 v.31 no.12 pp. 13901-13908
ISSN:
1520-5029
Subject:
aluminum oxide; fuels; nitric oxide; nitrogen; nitrous oxide; oxygen; pellets; specific energy
Abstract:
... The present study is devoted to the investigation of N₂O formation characteristics in dielectric barrier discharge (DBD) reactor for environmental application. The effect of operating parameters, such as specific energy density (SED), O₂ concentration, NO initial concentration, and residence time on N₂O concentration was investigated in dry O₂/N₂ mixtures. N₂O formation from bulk gas (O₂ and N₂) i ...
DOI:
10.1021/acs.energyfuels.7b02428

45. N2O5 Formation Mechanism during the Ozone-Based Low-Temperature Oxidation deNOx Process

Author:
Lin Fawei; Wang Zhihua; Ma Qiang; He Yong; Whiddon Ronald; Zhu Yanqun; Liu Jianzhong
Source:
Energy & Fuels 2016 v.30 no.6 pp. 5101-5107
ISSN:
1520-5029
Subject:
Fourier transform infrared spectroscopy; aluminum oxide; catalysts; nitric oxide; oxidation; ozone; prediction; solubility; temperature
Abstract:
... With advantage of the solubility improving from NO into a higher valence state of nitrogen oxides, especially N₂O₅, the ozone-based low-temperature oxidation deNOₓ process was investigated, especially the N₂O₅ formation mechanism. The temperature ranging from 60 to 150 °C and O₃/NO ratios and residence time changing were investigated by a well-designed experiment. N₂O₅ was detected by Fourier tran ...
DOI:
10.1021/acs.energyfuels.6b00824

46. Preparation of CeO2–ZrO2–Al2O3 composite with layered structure for improved Pd-only three-way catalyst

Author:
Li Lan; Hongmei Li; Shanhu Chen; Yaoqiang Chen
Source:
Journal of materials science 2017 v.52 no.16 pp. 9615-9629
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aluminum oxide; carbon monoxide; catalysts; catalytic activity; coprecipitation; nitric oxide; nitrogen; oxygen; palladium; thermal stability
Abstract:
... In this study, two CeO₂–ZrO₂–Al₂O₃ composites with layered structure were prepared by sequential precipitation route (SP) and compared with that obtained from conventional coprecipitation method (CC). The structural, textural and redox properties of the Pd-supported three-way catalysts were investigated by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), N₂ adsorption–desorption, CO chem ...
DOI:
10.1007/s10853-017-1168-5

47. Preparation, characterization, and activity of SnO2 nanoparticles supported on Al2O3 as a catalyst for the selective reduction of NO with C3H6

Author:
Masaaki Haneda; Yusuke Ota; Yasuyuki Doi; Masatomo Hattori
Source:
Journal of materials science 2016 v.51 no.24 pp. 10949-10959
ISSN:
0022-2461
Subject:
X-ray diffraction; aluminum oxide; catalysts; catalytic activity; nanoparticles; nitric oxide; particle size; temperature; tin dioxide; transmission electron microscopy
Abstract:
... SnO₂ nanoparticles were prepared using the hydrothermal method. The particle size was gradually increased with increasing the hydrothermal temperature and period. The size of SnO₂ nanoparticles was successfully controlled in the range of 2.3–5.9 nm. The deposition of SnO₂ nanoparticles on to Al₂O₃ was made through impregnation process. TEM and XRD measurements revealed that SnO₂ nanoparticles are ...
DOI:
10.1007/s10853-016-0307-8

48. Synthesis of Mg-Doped Ordered Mesoporous Pd–Al2O3 with Different Basicity for CO, NO, and HC Elimination

Author:
Yihong Xiao; Xiaohai Zheng; Xiaohua Chen; Lilong Jiang; Ying Zheng
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.7 pp. 1687-1695
ISSN:
1520-5045
Subject:
aluminum oxide; automobiles; carbon monoxide; catalysts; catalytic activity; gases; magnesium; nitric oxide; pH; porous media; process design; surface area
Abstract:
... Employing NH₄HCO₃ as pore-enlarging agent and P123 as a template agent, ordered mesoporous Mg-doped γ-Al₂O₃ with different basicity and large surface area have been successfully synthesized by a facile sol–gel approach by adjusting the content of magnesium and pH value. Specifically, the result alumina calcined at 1000 °C with large specific surface area (234.4 m² g–¹) and high pore volume (0.72 c ...
DOI:
10.1021/acs.iecr.6b03799

49. The black rock series supported SCR catalyst for NO x removal

Author:
Bin Xie; Hang Luo; Qing Tang; Jun Du; Zuohua Liu; Changyuan Tao
Source:
Environmental science and pollution research international 2017 v.24 no.27 pp. 21761-21769
ISSN:
0944-1344
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; catalysts; desorption; durability; iron; nitric oxide; nitrogen; oxygen; poisoning; potassium; silica; sulfur dioxide; temperature; texture; vanadium
Abstract:
... Black rock series (BRS) is of great potential for their plenty of valued oxides which include vanadium, iron, alumina and silica oxides, etc. BRS was used for directly preparing of selective catalytic reduction (SCR) catalyst by modifying its surface texture with SiO₂-TiO₂ sols and regulating its catalytic active constituents with V₂O₅ and MoO₃. Consequently, 90% NO removal ratio was obtained with ...
DOI:
10.1007/s11356-017-9622-0

50. A study on combustion of oil palm empty fruit bunch in a fluidized bed using alternative bed materials: Performance, emissions, and time-domain changes in the bed condition

Author:
Pichet Ninduangdee; Vladimir I. Kuprianov
Source:
Applied energy 2016 v.176 pp. 34-48
ISSN:
0306-2619
Subject:
Elaeis guineensis; air; aluminum oxide; biomass; burning; carbon monoxide; combustion; dolomite; emissions; energy-dispersive X-ray analysis; fats and oils industry; fluidized beds; fuels; limestone; methane; nitric oxide; oxygen; particle size; particulates; sand; scanning electron microscopy; temperature
Abstract:
... High-alkali empty fruit bunch (EFB), a biomass residue from the Thai palm oil industry, was burned in a fluidized-bed combustor using alumina sand, limestone, and dolomite as the bed material to prevent bed agglomeration. During the experiments, EFB was fired as pre-dried fuel at fixed (40kg/h) fuel feeding, whilst excess air varied from about 20% to 80%. Temperature, O2, CO, CxHy (as CH4), and NO ...
DOI:
10.1016/j.apenergy.2016.05.063