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You searched for: Subject term aluminum oxide Remove constraint Subject term: aluminum oxide Subject term nitric oxide Remove constraint Subject term: nitric oxide
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1. Catalytic Vapor Phase Nitroxidation of p-Xylene: a New Route for Synthesis of Terephthalic Acid and Poly(ethylene Terephthalate)

Author:
Vandana Kala; R. Prasad; A. L. Sharma; J. Mathew
Source:
Textile research journal v.62 no.10 pp. 603-607
ISSN:
1746-7748
Subject:
aluminum; aluminum oxide; atmospheric pressure; catalysts; fabrics; ferric oxide; nitric oxide; polyethylene terephthalates; temperature; textile fibers; vapors; xylene
Abstract:
... We have examined catalytic transformation of p-xylene into terephthalonitrile with nitric oxide (NO) over an aluminium oxide-supported ferric oxide catalyst using a fixed bed reactor in a temperature range of 320-460°c under atmospheric pressure. We achieved a maximum conversion of 80% with an Al₂O₃:Fe₂O₃ catalyst having an Al:Fe atomic ratio of nearly 1:1 at a temperature of 360°c with a NO:p-xyl ...
DOI:
10.1177/004051759206201008

2. Comprehensive study combining surface science and real catalyst for NO direct decomposition

Author:
Masaaki Haneda; Yoshiaki Kintaichi; Isao Nakamura; Tadahiro Fujitani; Hideaki Hamada
Source:
Chemical communications 2002 v. no.23 pp. 2816-2817
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; catalytic activity; chemical reactions; models; nitric oxide; palladium
Abstract:
... The catalytic activity of Pd/Al₂O₃ prepared from various palladium precursors for direct NO decomposition is closely related to the fraction of surface step sites capable of dissociating NO, on the basis of a surface science study using single-crystal model catalyst. ...
DOI:
10.1039/b207619e

3. Investigation of the morphology–catalytic reactivity relationship for Pt nanoparticles supported on alumina by using the reduction of NO with CH₄ as a model reaction

Author:
Ioan Balint; Akane Miyazaki; Ken-ichi Aika
Source:
Chemical communications 2002 v. no.10 pp. 1044-1045
ISSN:
1364-548X
Subject:
aluminum oxide; catalytic activity; chemical reactions; methane; models; nanoparticles; nitric oxide; platinum
Abstract:
... The morphological evolution of large Pt nanoparticles supported on alumina in reaction conditions has a significant impact on the catalytic behaviour for the NO/CH₄ reaction. ...
DOI:
10.1039/b202421g

4. Susceptibility of a heterogeneous catalyst, Rh/γ-alumina, to rapid structural change by exposure to NO

Author:
Tom Campbell; Andrew J. Dent; Sofia Diaz-Moreno; John Evans; Steven G. Fiddy; Mark A. Newton; Sandra Turin
Source:
Chemical communications 2002 v. no.4 pp. 304-305
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; chemical reactions; heat production; nitric oxide; particle size; rhodium
Abstract:
... Metal particles in a Rh/γ-Al₂O₃ catalyst of differing particle size are oxidised by NO/He within 5 seconds at 313 K; rapid, highly exothermic dissociative chemisorption of NO is the initial step. ...
DOI:
10.1039/b106846f

5. The catalytic activity of alumina supported Ru nanoparticles for NO/CH₄ reaction

Author:
Ioan Balint; Akane Miyazaki; Ken-ichi Aika
Source:
Chemical communications 2002 v. no.6 pp. 630-631
ISSN:
1364-548X
Subject:
aluminum oxide; catalytic activity; chemical reactions; methane; nanoparticles; nitric oxide; ruthenium; synthesis gas
Abstract:
... Alumina supported colloidal Ru nanoparticles, with an initial average size of 4.8 nm, show high activity for NO conversion for T ⩾ 450 °C and remarkably high selectivity (≈80%) to syngas at 600 °C. ...
DOI:
10.1039/b110602n

6. Preparation and characterization of AlVO4 compound

Author:
E. Arisi; S. A. Palomares Sánchez; F. Leccabue; B. E. Watts; G. Bocelli; F. Calderón; G. Calestani; L. Righi
Source:
Journal of materials science 2004 v.39 no.6 pp. 2107-2111
ISSN:
0022-2461
Subject:
X-ray diffraction; aluminum oxide; ceramics; crystal structure; gases; gels; nitrates; nitric oxide; nitrogen dioxide; scanning electron microscopy; sensory properties
Abstract:
... AlVO₄ is a relatively new sensor material derived from V₂O₅/Al₂O₃ mixtures to selectively detect NO and NO₂ gases. Previous studies carried out in order to determine its structural, absorptive and sensory properties indicate that the AlVO₄ is not the only single phase. This work deals with the synthesis of the compound by the ceramic and the nitrate decomposition methods, and by the sol gel route. ...
DOI:
10.1023/B:JMSC.0000017773.12230.1f

7. Synchronous, time resolved, diffuse reflectance FT-IR, energy dispersive EXAFS (EDE) and mass spectrometric investigation of the behaviour of Rh catalysts during NO reduction by CO

Author:
Mark A. Newton; Bhrat Jyoti; Andrew J. Dent; Steven G. Fiddy; John Evans
Source:
Chemical communications 2004 v. no.21 pp. 2382-2383
ISSN:
1364-548X
Subject:
Fourier transform infrared spectroscopy; X-ray absorption spectroscopy; aluminum oxide; carbon monoxide; catalysts; chemical reactions; energy; mass spectrometry; nitric oxide; reflectance; rhodium
Abstract:
... Synchronous, time resolved, infra-red, XAFS, and mass spectroscopies are simultaneously applied in situ to the investigation of the dynamic behaviour of Rh/Al₂O₃ catalysts during NO reduction by CO; NO conversion, and its kinetic character are closely correlated to the conversion of Rh(i) (predominantly Rhᴵ(CO)₂) to Rh(0). ...
DOI:
10.1039/b405694a

8. Particle size effects in Rh/Al2O3 catalysts as viewed from a structural, functional, and reactive perspective: the case of the reactive adsorption of NO

Author:
Mark A. Newton; Andrew J. Dent; Steven G. Fiddy; Bhrat Jyoti; John Evans
Source:
Journal of materials science 2007 v.42 no.10 pp. 3288-3298
ISSN:
0022-2461
Subject:
X-ray absorption spectroscopy; adsorption; aluminum oxide; catalysts; mass spectrometry; nanoparticles; nitric oxide; nitrogen; nitrous oxide; particle size; reflectance; temperature
Abstract:
... The structural-dynamic behaviour of γ-Al₂O₃ supported Rh nanoparticles under He, H₂/He, and NO/He has been investigated using a newly developed methodology that permits dispersive EXAFS (EDE), diffuse reflectance infra red spectroscopy (DRIFTS), and mass spectrometry (MS) to be applied simultaneously to the study of gas-solid interactions. This reveals a considerably variability in nanoparticle ha ...
DOI:
10.1007/s10853-006-0751-y

9. Real-Time Infrared Detection of Cyanide Flip on Silver-Alumina NOx Removal Catalyst

Author:
Thibault-Starzyk, Frédéric; Seguin, Etienne; Thomas, Sébastien; Daturi, Marco; Arnolds, Heike; King, David A.
Source:
Science 2009 v.324 no.5930 pp. 1048-1051
ISSN:
0036-8075
Subject:
Fourier transform infrared spectroscopy; aluminum oxide; carbon monoxide; catalysts; cyanides; emissions; nanosilver; nitric oxide; silver; spectral analysis
Abstract:
... Spectroscopic studies of the mechanistic steps that occur on supported precious metal catalysts used in industrial and automotive applications are hampered by a dearth of suitable experimental methods. We used femtosecond laser excitation followed by nanosecond time-resolved in situ Fourier-transform infrared spectroscopy to initiate a catalytic reaction on alumina-supported silver catalysts, whic ...
DOI:
10.1126/science.1169041

10. A highly efficient silver niobium alumina catalyst for the selective catalytic reduction of NO by n-decane

Author:
Carolina Petitto; Hubert P. Mutin; Gérard Delahay
Source:
Chemical communications 2011 v.47 no.38 pp. 10728-10730
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; catalytic activity; chemical communication; chemical reduction; hydrocarbons; niobium; nitric oxide; silver; sol-gel processing
Abstract:
... AgNb/Al₂O₃ prepared by a nonhydrolytic sol–gel process is a highly efficient catalyst for NOₓ removal through selective catalytic reduction by hydrocarbons (HC-SCR). This result shows that the HC-SCR process remains a challenging method for lean engine DeNOₓ. ...
DOI:
10.1039/c1cc12792f

11. Effect of the support on the high activity of the (Ni)Mo/ZrO₂–SBA-15 catalyst in the simultaneous hydrodesulfurization of DBT and 4,6-DMDBT

Author:
Oliver Y. Gutiérrez; Tatiana Klimova
Source:
Journal of catalysis 2011 v.281 no.1 pp. 50-62
ISSN:
0021-9517
Subject:
X-ray diffraction; adsorption; aluminum oxide; catalysts; molybdenum; nickel; nitric oxide; nitrogen; reflectance spectroscopy; transmission electron microscopy
Abstract:
... Series of Mo- and NiMo-catalysts were supported on ZrO₂, Al₂O₃, SBA-15, and ZrO₂-modified SBA-15 and tested in the simultaneous hydrodesulfurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The rate constants of the main steps in the HDS reaction network of both molecules were calculated, and the materials were characterized by N₂ physisorption, X-ray diffracti ...
DOI:
10.1016/j.jcat.2011.04.001

12. Influence of Ce addition on the catalytic behavior of alumina-supported Cu–Co catalysts in NO reduction with CO

Author:
I. Spassova; N. Velichkova; D. Nihtianova; M. Khristova
Source:
Journal of colloid and interface science 2011 v.354 no.2 pp. 777-784
ISSN:
0021-9797
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; active sites; adsorption; aluminum oxide; catalysts; catalytic activity; cerium; cobalt; copper; nitric oxide; transmission electron microscopy
Abstract:
... The effect of Ce addition to alumina-supported copper, cobalt, and copper–cobalt oxides with low loadings on the catalysts efficiency in NO reduction with CO was studied. The attention was focused on varying the impregnation procedure in the ternary-supported catalysts in order to determine the best catalyst as well as the reasons for the enhanced catalytic activity. Ternary Co–Cu–Ce and binary Co ...
DOI:
10.1016/j.jcis.2010.11.028

13. Investigation of simultaneous adsorption of SO₂ and NO on γ-alumina at low temperature using DRIFTS

Author:
Ying Xie; Ying Chen; Yugang Ma; Zhenglai Jin
Source:
Journal of hazardous materials 2011 v.195 no. pp. 223-229
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; adsorption; aluminum oxide; nitric oxide; nitrogen dioxide; oxidation; oxygen; reflectance; sulfur dioxide; temperature
Abstract:
... The interaction mechanism between SO₂ and NO on γ-Al₂O₃ was explored by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and outlet response of the concentrations of NO, NO₂ and SO₂ under exposure of Al₂O₃ to SO₂ and/or NO in the absence or presence of oxygen at 150°C. The results showed that SO₂ promoted NO oxidation and NO transformed weakly adsorbed SO₂ into strongly adsorbe ...
DOI:
10.1016/j.jhazmat.2011.08.032

14. MnOₓ–CeO₂–Al₂O₃ mixed oxides for soot oxidation: Activity and thermal stability

Author:
Xiaodong Wu; Shuang Liu; Duan Weng; Fan Lin; Rui Ran
Source:
Journal of hazardous materials 2011 v.187 no.1-3 pp. 283-290
ISSN:
0304-3894
Subject:
acetates; air flow; aluminum oxide; catalysts; cerium; manganese; nitrates; nitric oxide; oxidation; powders; sol-gel processing; synergism; temperature; thermal stability
Abstract:
... MnOₓ–CeO₂–Al₂O₃ mixed oxides were prepared by impregnating manganese acetate and cerium nitrate on alumina powders using the sol–gel method. The thermal stabilities of MnOₓ–CeO₂ and Al₂O₃-modified mixed oxides were evaluated by treating at 800°C in dry air flow for 20h. The introduction of Al₂O₃ markedly increases the textural stability of the catalyst with a relatively high dispersion of MnOₓ and ...
DOI:
10.1016/j.jhazmat.2011.01.010

15. Nitric oxide enhances aluminum tolerance by affecting cell wall polysaccharides in rice roots

Author:
Zeyong Zhang; Huahua Wang; Xiaomin Wang; Yurong Bi
Source:
Plant cell reports 2011 v.30 no.9 pp. 1701-1711
ISSN:
0721-7714
Subject:
Oryza sativa; aluminum; aluminum oxide; butylated hydroxyanisole; cell walls; lipid peroxidation; methylation; nitric oxide; pectins; rice; root growth; root tips; seedlings; single nucleotide polymorphism; sodium
Abstract:
... Nitric oxide (NO) is a key signal molecule involved in many physiological processes in plants. To study the mechanisms of exogenous NO contribution to alleviate the aluminum (Al) toxicity, roots of rice (Oryza sativa) seedlings pre-treated with sodium nitroprusside (SNP, a NO donor) were used to investigate the effect of Al in this study. Results indicated that NO alleviated the lipid peroxidation ...
DOI:
10.1007/s00299-011-1078-y
PubMed:
21553108

16. Removals of fly ash and NO in a fluidized-bed reactor with CuO/activated carbon catalysts

Author:
Jui-Yeh Rau; Jyh-Cherng Chen; Shih-Teng Huang; Wen-Tsung Hung; Ming-Yen Wey
Source:
Journal of hazardous materials 2011 v.187 no.1-3 pp. 190-198
ISSN:
0304-3894
Subject:
activated carbon; active sites; aluminum oxide; catalysts; cupric oxide; fluidized beds; fly ash; nitric oxide; silica
Abstract:
... This study investigates the effects of fly ash compositions (SiO₂ and Al₂O₃), particle sizes (4–10μm and 40μm), and concentrations on the simultaneous removals of fly ash and NO using a fluidized-bed catalyst reactor. Experimental results show that the removal efficiencies of fly ash and NO at particle concentrations of 968–11,181mgm⁻³ are 71–97% and 42–57%, respectively. SiO₂ particles have more ...
DOI:
10.1016/j.jhazmat.2011.01.018

17. Catalytic reduction of NO with decomposed methanol on alumina-supported Mn–Ce catalysts

Author:
I. Spassova; T. Tsontcheva; N. Velichkova; M. Khristova; D. Nihtianova
Source:
Journal of colloid and interface science 2012 v.374 no.1 pp. 267-277
ISSN:
0021-9797
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; active sites; aluminum oxide; catalysts; catalytic activity; gases; hydrogen; manganese; methanol; nitric oxide; nitrogen; temperature; transmission electron microscopy
Abstract:
... A series of manganese–ceria supported on alumina catalysts with various Mn/Ce ratios are investigated in both methanol decomposition to CO and hydrogen and SCR of NOₓ with CO. The study is aimed at the potential application of both reactions in integrated devices, where NOₓ is reduced with the products of the decomposed methanol. The samples are characterized by nitrogen physisorption, XRD, TEM, X ...
DOI:
10.1016/j.jcis.2012.01.042

18. Combustion of peanut shells in a cone-shaped bubbling fluidized-bed combustor using alumina as the bed material

Author:
Porametr Arromdee; Vladimir I. Kuprianov
Source:
Applied energy 2012 v.97 no. pp. 470-482
ISSN:
0306-2619
Subject:
air; aluminum oxide; biomass; burning; carbon monoxide; combustion; emissions; fluidized beds; fuels; hydrodynamics; methane; nitric oxide; oxygen; peanut hulls; sand; temperature
Abstract:
... This paper reports experimental studies on burning peanut shells in the conical fluidized-bed combustor using alumina sand as the fluidizing agent. Prior to combustion tests, hydrodynamic regimes and characteristics of a conical alumina–biomass bed were investigated under cold-state conditions for variable percentage of peanut shells in the mixture and static bed height. With selected particle siz ...
DOI:
10.1016/j.apenergy.2012.03.048

19. Development of a cataluminescence-based method for rapid screening of de-NOₓ catalysts

Author:
Liyan Wu; Yantu Zhang; Sichun Zhang; Xinrong Zhang
Source:
Analytical methods 2012 v.4 no.8 pp. 2218-2220
ISSN:
1759-9679
Subject:
aluminum oxide; analytical methods; catalysts; catalytic activity; nitric oxide; rapid methods; screening; temperature
Abstract:
... Here we report a cataluminescence-based method in the combinatorial discovery of active catalysts for NO reduction by C₃H₆. This method is based on the fact that NO reduction generates cataluminescence emission on the surface of various metal catalysts supported on BaO/Al₂O₃, whose intensity is correlated to the activity of the catalyst. The catalytic activities of the catalysts were evaluated in ...
DOI:
10.1039/c2ay25323b

20. Effect of CeO₂ and Al₂O₃ on the activity of Pd/Co₃O₄/cordierite catalyst in the three-way catalysis reactions (CO/NO/CₙHₘ)

Author:
Sergiy O. Soloviev; Pavlo I. Kyriienko; Nataliia O. Popovych
Source:
Journal of environmental sciences (China) 2012 v.24 no.7 pp. 1327-1333
ISSN:
1001-0742
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; carbon monoxide; catalysts; catalytic activity; ceric oxide; cerium; cobalt; hexane; hydrogen; nitric oxide; oxidation; oxygen; sulfur dioxide; temperature; transmission electron microscopy
Abstract:
... The present article studies the effect of CeO₂ and Al₂O₃ on the activity of Pd/Co₃O₄/cordierite catalyst in conversion of NO, CO, CₙHₘ. The catalysts were characterized by temperature programmed reduction with hydrogen, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. It is shown that the effect of CeO₂ on the properties of Pd/Co₃O₄/cordierite catalyst depe ...
DOI:
10.1016/S1001-0742(11)60930-3

21. Investigation on the NO Reduction with Coal Char and High Concentration CO during Oxy-fuel Combustion

Author:
Wang Chang’an; Du Yongbo; Che Defu
Source:
Energy & Fuels 2012 v.26 no.12 pp. 7367-7377
ISSN:
1520-5029
Subject:
activation energy; aluminum oxide; calcium oxide; carbon; carbon dioxide; carbon monoxide; catalytic activity; coal; combustion; ferric oxide; magnesium oxide; nitric oxide; quartz; sulfur dioxide; sustainable technology; temperature
Abstract:
... Oxy-fuel combustion is one of the near-zero emission clean coal technologies which can realize large-scale CO₂ capture, low NOₓ emission, and easy removal of SO₂. This paper focuses on the reduction mechanism of NOₓ during oxy-fuel combustion. The influence of high concentration CO on the NO reduction with coal char, ash, and various metal materials has been studied in a laboratory-scale quartz re ...
DOI:
10.1021/ef301202w

22. NOx Abatement by HC-Assisted SCR over Combustion Synthesized-Supported Ag Catalysts

Author:
Hussain Murid; Russo Nunzio; Saracco Guido
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.22 pp. 7467-7474
ISSN:
1520-5045
Subject:
Lantana; X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; benzene; catalysts; catalytic activity; ceric oxide; combustion; energy-dispersive X-ray analysis; engineering; lanthanum; nitric oxide; nitrogen; oxygen; powders; reaction mechanisms; scanning electron microscopy; silver; synergism; temperature; transmission electron microscopy; zirconium oxide
Abstract:
... In this work, catalysts containing 2% by weight of silver particles dispersed on different oxide supports (CeO₂, La₂O₃, ZrO₂, Al₂O₃), and oxides without silver particles were prepared by means of the combustion synthesis method. This cheap and quick technique has been developed to produce very fine, homogeneous, crystalline powders without the intermediate decomposition and/or calcining steps whic ...
DOI:
10.1021/ie200974p

23. The effects of Cu/HZSM-5 on combined removal of Hg⁰ and NO from flue gas

Author:
Xiaopeng Fan; Caiting Li; Guangming Zeng; Xing Zhang; Shasha Tao; Pei Lu; Shanhong Li; Yapei Zhao
Source:
Fuel processing technology 2012 v.104 no. pp. 325-331
ISSN:
0378-3820
Subject:
adsorption; aluminum oxide; catalysts; copper; nitric oxide; nitrogen dioxide; oxygen; porosity; silica; sulfur dioxide; synergism; zeolites
Abstract:
... The combined removals of Hg⁰ and NO over zeolite (HZSM-5 was chosen to use) modified by copper (Cu/HZSM-5) catalysts were studied under different simulated flue gas conditions. Compared with HZSM-5, Cu/HZSM-5 showed higher activity and performed a synergetic effect for the Hg⁰ and NO removal at 250°C. But the excess of copper could cause destruction of the thin pore walls and blocking of internal ...
DOI:
10.1016/j.fuproc.2012.06.003

24. Amperometric Nitric Oxide Sensor Based on Nanoporous Platinum Phthalocyanine Modified Electrodes

Author:
Yap C. M.; Xu G. Q.; Ang S. G.
Source:
Analytical chemistry 2013 v.85 no.1 pp. 107-113
ISSN:
1520-6882
Subject:
aluminum oxide; carbon; copper; electrodes; matrix-assisted laser desorption-ionization mass spectrometry; nanotubes; nitric oxide; nuclear magnetic resonance spectroscopy; pH; platinum; surface area; zinc
Abstract:
... This article describes the fabrication of electropolymerized Metallo 4′, 4″, 4‴, 4′′′′ tetra-amine phthalocyanine (poly-MTAPc) modified electrodes for the detection of nitric oxide (NO) in phosphate-buffered saline (PBS) at pH 7.4. A two-step synthetic protocol using a laboratory microwave reactor was adopted to provide three MTAPc complexes bearing different metal centers (M = Cu²⁺: CuTAPc, M = Z ...
DOI:
10.1021/ac302081h

25. Electrochemical NOₓ reduction on an LSM/CGO symmetric cell modified by NOₓ adsorbents

Author:
Jing Shao; Kent Kammer Hansen
Source:
Journal of materials chemistry A 2013 v.1 no.24 pp. 7137-7146
ISSN:
2050-7496
Subject:
adsorbents; adsorption; aluminum oxide; barium; catalysts; cell structures; ceramics; coatings; electric potential difference; electrochemistry; electrodes; energy use and consumption; microstructure; nitrate reduction; nitric oxide; oxidation; platinum; temperature
Abstract:
... This study investigated the effect of modifying a (La₀.₈₅Sr₀.₁₅)₀.₉₉MnO₃ (LSM)/Ce₀.₉Gd₀.₁O₁.₉₅ (CGO) symmetric cell by NOₓ adsorbents on the electrochemical reduction of NOₓ under O₂-rich conditions. The modification was based on a full ceramic cell structure without any noble metals. Three cells were prepared and tested: a blank cell, a cell impregnated with BaO, and a cell coated with a BaO/Pt/A ...
DOI:
10.1039/c3ta10901a

26. Toxicity of aluminium oxide nanoparticles demonstrated using a BY-2 plant cell suspension culture model

Author:
Zuzana Poborilova; Radka Opatrilova; Petr Babula
Source:
Environmental and experimental botany 2013 v.91 pp. 1-11
ISSN:
0098-8472
Subject:
DNA fragmentation; aluminum oxide; apoptosis; cell suspension culture; cells; cosmetics; environmental impact; hydrogen peroxide; industry; lipid peroxidation; membrane permeability; models; nanoparticles; nitric oxide; nitrogen; oxygen; superoxide anion; tobacco; toxicity
Abstract:
... Aluminium oxide nanoparticles have been applied in many branches of industry. They are also used in personal care products, such as cosmetics. Because of these uses, their impact on the environment must be considered and investigated. Almost nothing is known about the effects of aluminium oxide nanoparticles on plants at the cellular level; the objective of this work was thus to study the effects ...
DOI:
10.1016/j.envexpbot.2013.03.002

27. Combustion of palm kernel shell in a fluidized bed: Optimization of biomass particle size and operating conditions

Author:
Pichet Ninduangdee; Vladimir I. Kuprianov
Source:
Energy conversion and management 2014 v.85 pp. 800-808
ISSN:
0196-8904
Subject:
air; aluminum oxide; biomass; burning; carbon monoxide; combustion; combustion efficiency; feedstocks; fluidized beds; gas emissions; methane; nitric oxide; nitrogen; oxygen; particle size; pollutants; sand; temperature; thermogravimetry
Abstract:
... This work presents a study on the combustion of palm kernel shell (PKS) in a conical fluidized-bed combustor (FBC) using alumina sand as the bed material to prevent bed agglomeration. Prior to combustion experiments, a thermogravimetric analysis was performed in nitrogen and dry air to investigate the effects of biomass particle size on thermal and combustion reactivity of PKS. During the combusti ...
DOI:
10.1016/j.enconman.2014.01.054

28. Effects of the Extent of Silica Doping and the Mesopore Size of an Alumina Support on Activity as a Diesel Oxidation Catalyst

Author:
Uchisawa Junko; Tango Takeru; Caravella Alessio; Hara Shigeki; Haneda Masaaki; Murakami Tatsuro; Nakagawa Hideyuki; Nanba Tetsuya; Obuchi Akira
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.19 pp. 7992-7998
ISSN:
1520-5045
Subject:
aluminum oxide; catalysts; catalytic activity; engineering; heat treatment; hydrocarbons; nitric oxide; oxidation; silica
Abstract:
... Both the extent of SiO₂ doping and the mesopore size of alumina were investigated with the aim of developing a support that maintains high activity during the catalytic oxidation of diesel exhaust hydrocarbons and NO over 0.75 wt % Pt/0.25 wt % Pd even after high temperature treatment. By controlling the SiO₂ doping ratio and heat treatment conditions during the preparation process, 24 types of Si ...
DOI:
10.1021/ie5005724

29. Fe(III) oxides accelerate microbial nitrate reduction and electricity generation by Klebsiella pneumoniae L17

Author:
Tongxu Liu; Xiaomin Li; Wei Zhang; Min Hu; Fangbai Li
Source:
Journal of colloid and interface science 2014 v.423 pp. 25-32
ISSN:
0021-9797
Subject:
Klebsiella pneumoniae; aluminum oxide; ammonium; anaerobic conditions; bacteria; electricity; electricity generation; electrodes; electron transfer; hematite; iron; maghemite; nitrate reduction; nitrates; nitric oxide; nitrites; nitrous oxide; sorption; titanium dioxide
Abstract:
... Klebsiella pneumoniae L17 is a fermentative bacterium that can reduce iron oxide and generate electricity under anoxic conditions, as previously reported. This study reveals that K. pneumoniae L17 is also capable of dissimilatory nitrate reduction, producing NO2-, NH4+, NO and N2O under anoxic conditions. The presence of Fe(III) oxides (i.e., α-FeOOH, γ-FeOOH, α-Fe2O3 and γ-Fe2O3) significantly ac ...
DOI:
10.1016/j.jcis.2014.02.026

30. First principles investigation of NO₂ and SO₂ adsorption on γ-Al₂O₃ supported mono- and diatomic metal clusters

Author:
Zuleyha Artuc; Hande Ustunel; Daniele Toffoli
Source:
RSC advances 2014 v.4 no.89 pp. 48492-48506
ISSN:
2046-2069
Subject:
adsorption; aluminum oxide; burning; catalysts; diesel engines; fuels; gases; geometry; nitric oxide; nitrogen dioxide; platinum; rhodium; sulfur; sulfur dioxide; sulfur oxides
Abstract:
... NOₓ storage/reduction catalysts have been developed in the 1990's to minimize the emission of harmful NO and NO₂ gases as a result of lean burning in diesel engines. Sulfur poisoning of the catalyst occurs when SOₓ (x = 2–3) species present in the fuel react aggressively with both the storage and the precious metal redox components. In the present work, DFT calculations within the plane wave, pseu ...
DOI:
10.1039/c4ra05051g

31. Immobilization of Polymeric g-C3N4 on Structured Ceramic Foam for Efficient Visible Light Photocatalytic Air Purification with Real Indoor Illumination

Author:
Dong Fan; Wang Zhenyu; Li Yuhan; Ho Wing-Kei; Lee S. C.
Source:
Environmental Science & Technology 2014 v.48 no.17 pp. 10345-10353
ISSN:
1520-5851
Subject:
air; aluminum oxide; carbon nitride; ceramics; electron paramagnetic resonance spectroscopy; energy conservation; foams; lighting; monitoring; nitric oxide; oxidation; photocatalysis; photocatalysts; pyrolysis; temperature
Abstract:
... The immobilization of a photocatalyst on a proper support is pivotal for practical environmental applications. In this work, graphitic carbon nitride (g-C₃N₄) as a rising visible light photocatalyst was first immobilized on structured Al₂O₃ ceramic foam by a novel in situ approach. Immobilized g-C₃N₄ was applied for photocatalytic removal of 600 ppb level NO in air under real indoor illumination o ...
DOI:
10.1021/es502290f

32. Promotion effects of SiO2 or/and Al2O3 doped CeO2/TiO2 catalysts for selective catalytic reduction of NO by NH3

Author:
Wenru Zhao; Yu Tang; Yaping Wan; Liang Li; Si Yao; Xiaowei Li; Jinlou Gu; Yongsheng Li; Jianlin Shi
Source:
Journal of hazardous materials 2014 v.278 pp. 350-359
ISSN:
0304-3894
Subject:
Lewis acids; aluminum oxide; ammonia; catalysts; catalytic activity; nitric oxide; oxygen; poisoning; silica; sulfur dioxide; temperature; titanium dioxide
Abstract:
... A series of the CeO2-based catalysts loaded on TiO2, TiO2–SiO2, TiO2–Al2O3, and TiO2–SiO2–Al2O3 supports were prepared by incipient impregnation method for the selective catalytic reduction (SCR) of NO by NH3 in the presence of oxygen. The SCR activities of the catalysts with different supports increases in the order of Ce/TiO2
DOI:
10.1016/j.jhazmat.2014.05.071

33. Reactivity of an Arene Cobalt Triple Decker Complex Towards Various Ligands. Facile Arene Displacement in [Bis{(η5-pentamethylcyclopentadienyl)cobalt}-μ-{η4: η4-toluene}]

Author:
Jörg J. Schneider
Source:
Zeitschrift für Naturforschung B 2014 v.50 no.7 pp. 1055-1060
ISSN:
1865-7117
Subject:
aluminum oxide; ambient temperature; cobalt; ethylene; hydrogen; ligands; naphthalene; nickel; nitric oxide; phenanthrenes; sulfur; toluene
Abstract:
... The triple decker complex [{(η⁵-Cp*)Co}₂-μ-{η⁴: η⁴-toluene}] 1b exhibits an unusual reactivity towards a variety of organic ligands, 1b reacts with CO, ethene, butadiene, H₂, Al₂O₃, hexafluorobenzene, 1.5 Cod, 2-butyne, phenanthrene, naphthalene and the dinuclear Ni cluster [{(η⁵-Cp)NiP(C₂H₅)₃}₂] to form mainly mononuclear organocobalt complexes. Reaction of 1b with NO and the diazoalkanes di-t-bu ...
DOI:
10.1515/znb-1995-0712

34. Activity and thermal stability of Pt/Ce0.64Mn0.16R0.2Ox (R=Al, Zr, La, or Y) for soot and NO oxidation

Author:
Hai-Long Zhang; Yi Zhu; Shi-Dan Wang; Ming Zhao; Mao-Chu Gong; Yao-Qiang Chen
Source:
Fuel processing technology 2015 v.137 pp. 38-47
ISSN:
0378-3820
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum; aluminum oxide; catalysts; ceric oxide; cerium; coprecipitation; heat treatment; lanthanum; manganese; manganese oxides; nitric oxide; nitrogen dioxide; oxidants; oxidation; platinum; soot; temperature; thermal stability; yttrium; zirconium; zirconium oxide
Abstract:
... In this study, Al2O3, ZrO2, La2O3, and Y2O3 were separately introduced into Pt/CeO2-MnOx catalyst to improve the thermal stability of catalysts and obtain a better soot and NO oxidation activity after thermal treatment. CeO2-MnOx-ROx (R=Al, La, Y, or Zr) mixed oxides were prepared by a co-precipitation method. The catalysts were characterized by XRD, BET, H2-TPR, CO chemisorption, XPS, TG analysis ...
DOI:
10.1016/j.fuproc.2015.03.027

35. Ag modified Mn–Ce/γ-Al2O3 catalyst for selective catalytic reduction of NO with NH3 at low-temperature

Author:
Fan Cao; Jun Xiang; Sheng Su; Pengying Wang; Song Hu; Lushi Sun
Source:
Fuel processing technology 2015 v.135 pp. 66-72
ISSN:
0378-3820
Subject:
Ammonia (Rotaliidae); Lewis acids; adsorption; aluminum oxide; ammonia; catalysts; cerium; manganese; nitrates; nitric oxide; nitrites; oxidation; oxygen; silver; silver oxide; temperature
Abstract:
... Mn–Ce/γ-Al2O3 granular catalyst was modified by adding silver and then developed in the low temperature selective catalytic reduction (SCR) of NO with NH3. It showed outstanding SCR activity in low and middle temperature region and achieved 95% NO conversion at 250°C. It also performed excellent space velocity tolerance in a wide range. The characterization results showed that silver mainly existe ...
DOI:
10.1016/j.fuproc.2014.10.021

36. Combustion of an oil palm residue with elevated potassium content in a fluidized-bed combustor using alternative bed materials for preventing bed agglomeration

Author:
Pichet Ninduangdee; Vladimir I. Kuprianov
Source:
Bioresource technology 2015 v.182 pp. 272-281
ISSN:
0960-8524
Subject:
Elaeis guineensis; X-radiation; air; aluminum oxide; burning; carbon monoxide; combustion; dolomite; elemental composition; emissions; fluidized beds; fluorescence; limestone; nitric oxide; palm kernels; potassium; seeds; temperature
Abstract:
... Palm kernel shell (PKS) was burned at 45kg/s and excess air of 20–80% in a fluidized-bed combustor using alumina, dolomite, and limestone as the bed material. Temperature and gas concentrations were recorded along the reactor centerline as well as at stack. A SEM–EDS analysis was performed to investigate morphology and elemental composition of bed particles. An X-ray fluorescence method was used t ...
DOI:
10.1016/j.biortech.2015.01.128

37. Control of NO and Hg0 emissions by SCR catalysts from coal-fired boiler

Author:
Jun Xiang; Pengying Wang; Sheng Su; Liqi Zhang; Fan Cao; Zhijun Sun; Xi Xiao; Lushi Sun; Song Hu
Source:
Fuel processing technology 2015 v.135 pp. 168-173
ISSN:
0378-3820
Subject:
abrasion resistance; aluminum oxide; catalysts; coal; cupric oxide; ferric oxide; fly ash; mercury; nitric oxide; oxidation; power plants; recycling; strength (mechanics); temperature
Abstract:
... CuO/γ-Al2O3 and CuO–MnO2–Fe2O3/γ-Al2O3 catalysts were synthesized by impregnation method. Their performances for selective catalytic reduction (SCR) were explored in a 200MW coal-fired power plant boiler tail flue. The effects of catalyst amounts, NH3/NO molar ratios, abrasion resistance, catalyst regeneration and the catalytic efficiencies for Hg⁰ oxidation were also discussed here. The optimum t ...
DOI:
10.1016/j.fuproc.2014.12.044

38. Enhanced catalytic activity for NO oxidation over Ba doped LaCoO₃ catalyst

Author:
Chen Zhou; Zijian Feng; Yexin Zhang; Lingjun Hu; Rong Chen; Bin Shan; Hongfeng Yin; Wei Guo Wang; Aisheng Huang
Source:
RSC advances 2015 v.5 no.36 pp. 28054-28059
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; aluminum oxide; barium; catalysts; catalytic activity; nitric oxide; oxidation; platinum; sol-gel processing; transmission electron microscopy
Abstract:
... A series of La₁₋ₓBaₓCoO₃ (x = 0, 0.1, 0.2, 0.3) perovskites were synthesized by the modified sol–gel method, and their activities for NO oxidation were investigated as well. The relevant structural characterizations of the prepared catalysts were conducted by XRD, ICP, BET, FTIR, TEM, H₂-TPR and NO-TPD. The performance evaluation indicated that introduction of Ba at the A-site in LaCoO₃ greatly im ...
DOI:
10.1039/c5ra02344k

39. Opportunities for ceria-based mixed oxides versus commercial platinum-based catalysts in the soot combustion reaction. Mechanistic implications

Author:
Javier Giménez-Mañogil; Avelina García-García
Source:
Fuel processing technology 2015 v.129 pp. 227-235
ISSN:
0378-3820
Subject:
activation energy; aluminum oxide; catalysts; catalytic activity; combustion; mass transfer; nitric oxide; nitrogen dioxide; platinum; soot
Abstract:
... The aim of this paper is to study the activities of ceria–zirconia and copper/ceria–zirconia catalysts, comparing with a commercial platinum/alumina catalyst, for soot combustion reaction under different gas atmospheres and loose contact mode (simulating diesel exhaust conditions), in order to analyse the kinetics and to deduce mechanistic implications.Activity tests were performed under isotherma ...
DOI:
10.1016/j.fuproc.2014.09.018

40. Oxidation of diesel soot on binary oxide CuCr(Co)-based monoliths

Author:
Sergiy O. Soloviev; Andriy Y. Kapran; Yaroslava P. Kurylets
Source:
Journal of Environmental Sciences 2015 v.28 pp. 171-177
ISSN:
1001-0742
Subject:
aluminum oxide; ambient temperature; carbon dioxide; catalysts; coatings; cold; combs (social insects); combustion; filters; gases; nitric oxide; oxidants; oxygen; ozone; soot
Abstract:
... Binary oxide systems (CuCr2O4, CuCo2O4), deposited onto cordierite monoliths of honeycomb structure with a second support (finely dispersed Al2O3), were prepared as filters for catalytic combustion of diesel soot using internal combustion engine's gas exhausts (O2, NOx, H2O, CO2) and O3 as oxidizing agents. It is shown that the second support increases soot capacity of aforementioned filters, and ...
DOI:
10.1016/j.jes.2014.08.017

41. Simultaneous adsorption of SO2 and NO from flue gas over mesoporous alumina

Author:
Xin Sun; Xiaolong Tang; Honghong Yi; Kai Li; Ping Ning; Bin Huang; Fang Wang; Qin Yuan
Source:
Environmental technology 2015 v.36 no.5 pp. 588-594
ISSN:
1479-487X
Subject:
adsorbents; adsorption; aluminum oxide; environmental technology; nitric oxide; oxygen; relative humidity; sulfur dioxide; temperature; water vapor
Abstract:
... Mesoporous alumina (MA) with a higher ability to simultaneously remove SO ₂ and NO was prepared by the evaporation-induced self-assembly process. The adsorption capacities of MA are 1.79 and 0.702 mmol/g for SO ₂ and NO, respectively. The Brunauer–Emmett–Teller method was used to characterize the adsorbent. Simultaneous adsorption of SO ₂ and NO from flue gas over MA in different operating conditi ...
DOI:
10.1080/09593330.2014.953600

42. Spontaneous and Light-Driven Conversion of NOx on Oxide-Modified TiO2 Surfaces

Author:
Dinh Cao-Thang; Hoogland Sjoerd; Sargent Edward H.
Source:
Industrial & Engineering Chemistry Research 2015 v.54 no.51 pp. 12750-12756
ISSN:
1520-5045
Subject:
aluminum oxide; atmospheric chemistry; coatings; engineering; gases; lighting; nitric oxide; nitrogen dioxide; nitrous oxide; oxygen; titanium dioxide; ultraviolet radiation
Abstract:
... Heterogeneous reactions of trace atmospheric gases on solid surfaces play an important role in atmospheric chemistry. In this study, we investigate the reaction of NO₂ with solid surfaces of TiO₂ covered with a thin layer of an alumina–silica mixture over a range of different compositions. The reactions were conducted in the presence of oxygen under dark or ultraviolet light (UV) illumination cond ...
DOI:
10.1021/acs.iecr.5b03710

43. Thermal decomposition of bulk and supported barium nitrate

Author:
Christopher J. Bardwell; Roger I. Bickley; Stephen Poulston; Martyn V. Twigg
Source:
Thermochimica acta 2015 v.613 pp. 94-99
ISSN:
0040-6031
Subject:
adsorption; aluminum oxide; barium nitrate; gases; nitric oxide; nitrogen; nitrogen dioxide; nitrous oxide; oxygen; synergism; temperature; thermal degradation; titanium dioxide
Abstract:
... Anhydrous bulk barium nitrate decomposes over the temperature range 500–700°C, with the main decomposition taking place at 630°C. The gaseous products were oxygen and nitric oxide that were evolved simultaneously. Minor amounts of nitrogen dioxide, nitrogen, and nitrous oxide were also detected. Dispersing the barium nitrate on alumina and titania led to substantial reductions in the nitrate decom ...
DOI:
10.1016/j.tca.2015.05.013

44. 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

45. Copper Oxides Supported on Aluminum Oxide Borates for Catalytic Ammonia Combustion

Author:
Hinokuma Satoshi; Matsuki Shun; Kawabata Yusuke; Shimanoe Hiroki; Kiritoshi Saaya; Machida Masato
Source:
The Journal of Physical Chemistry C 2016 v.120 no.43 pp. 24734-24742
ISSN:
1932-7455
Subject:
X-radiation; X-ray photoelectron spectroscopy; absorption; adsorption; aluminum oxide; ammonia; borates; combustion; copper; energy-dispersive X-ray analysis; nanoparticles; nitric oxide; nitrogen; nitrous oxide; reaction mechanisms; temperature; thermal stability; transmission electron microscopy
Abstract:
... The catalytic NH₃ combustion properties and local structures of copper oxides (CuOₓ) supported on aluminum oxide borates (Al₂₀B₄O₃₆, 10Al₂O₃·2B₂O₃: 10A2B) were studied by means of high-angle annular dark-field scanning transmission electron microscopy, energy dispersive X-ray mapping, X-ray absorption fine structure, X-ray photoelectron spectroscopy, gas adsorption techniques, etc. Among the CuOₓ ...
DOI:
10.1021/acs.jpcc.6b07157

46. Effect of water vapor on sulfur poisoning of MnOₓ–CeO₂/Al₂O₃ catalyst for diesel soot oxidation

Author:
Yuxi Gao; Xiaodong Wu; Shuang Liu; Duan Weng; Rui ran
Source:
RSC advances 2016 v.6 no.62 pp. 57033-57040
ISSN:
2046-2069
Subject:
acidity; aluminum oxide; ammonia; catalysts; desorption; hydrogen; infrared spectroscopy; moieties; nitric oxide; nitrogen dioxide; oxidation; oxygen; poisoning; soot; sulfates; sulfur; thermogravimetry; water vapor
Abstract:
... MnOₓ–CeO₂ mixed oxide supported on γ-Al₂O₃ was sulfated in dry and wet atmospheres to explore the effect of water during sulfur poisoning. The fresh and poisoned catalysts were characterized by Brunauer–Emmett–Teller (BET), thermo-gravimetric analysis (TGA), NH₃ temperature-programmed desorption (NH₃-TPD), infrared spectroscopy (IR), H₂ temperature-programmed reduction (H₂-TPR), NO temperature-pro ...
DOI:
10.1039/c6ra09241a

47. Hierarchically porous Fe-N-doped carbon nanotubes as efficient electrocatalyst for oxygen reduction

Author:
Jin-Cheng Li; Peng-Xiang Hou; Chao Shi; Shi-Yong Zhao; Dai-Ming Tang; Min Cheng; Chang Liu; Hui-Ming Cheng
Source:
Carbon 2016 v.109 pp. 632-639
ISSN:
0008-6223
Subject:
active sites; aluminum oxide; ammonia; carbon; carbon nanotubes; iron; mass transfer; micropores; nitric oxide; oxygen; surface area
Abstract:
... A hierarchically meso/micro-porous Fe-N-doped carbon nanotube electrocatalyst (meso/micro-Fe-N-CNT), for the first time, was synthesized. Anodic aluminum oxide (AAO) was used as a template to cast the CNT framework and Fe(NO)3 was filled in the AAO nanochannels as both a mesopore template in CNT walls and the iron source to form Fe-N-C active sites. Subsequent NH3 activation was carried out to cre ...
DOI:
10.1016/j.carbon.2016.08.078

48. 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

49. 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

50. Removal of Elemental Mercury by MnOx Catalysts Supported on TiO2 or Al2O3

Author:
Cimino Stefano; Scala Fabrizio
Source:
Industrial & Engineering Chemistry Research 2016 v.55 no.18 pp. 5133-5138
ISSN:
1520-5045
Subject:
X-ray diffraction; aluminum oxide; ammonia; catalysts; engineering; flue gas; mercury; nitric oxide; sorbents; temperature; titanium dioxide
Abstract:
... The performance of two Mn-based catalysts/sorbents developed for simultaneous low-temperature selective catalytic reduction (SCR) of NOₓ with NH₃ and Hg capture was studied in the temperature range 50–250 °C. In particular, the effect of the type of support (TiO₂ vs Al₂O₃) on both NOₓ conversion and Hg capture efficiency was investigated. The two catalysts displayed significant and quite similar N ...
DOI:
10.1021/acs.iecr.5b04147