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You searched for: Subject "acidity" Remove constraint Subject: "acidity" Journal Energy & fuels Remove constraint Journal: Energy & fuels Publication Year 2019 Remove constraint Publication Year: 2019
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1. Two-Step Sequence of Acetalization and Hydrogenation for Synthesis of Diesel Fuel Additives from Furfural and Diols

Author:
Patil, Anil; Shinde, Suhas; Kamble, Sanjay; Rode, Chandrashekhar V.
Source:
Energy & fuels 2019 v.33 no.8 pp. 7466-7472
ISSN:
1520-5029
Subject:
acidity,   etc   ; acids; additives; ambient temperature; biodiesel; byproducts; catalysts; cyclohexanes; diesel fuel; fuel production; furfural; glycerol; glycols; hydrogen; hydrogenation; models; moieties; palladium;     Show all 18 Subjects
Abstract:
... Acetalization of diols with furfural and subsequent hydrogenation of acetal products provided potential fuel additives that could be blended into commercial diesel. Glycerol could be an interesting polyol for acetalization with furfural due to its low cost, and it is produced as a byproduct in very large amount in the process of biodiesel production. In this work, glycerol acetalization with furfu ...
DOI:
10.1021/acs.energyfuels.9b01640

2. Effect of Nitro Groups on Desulfurization Efficiency of Benzyl-Substituted Imidiazolium-Based Ionic Liquids: Experimental and Computational Approach

Author:
Patra, Rabi Narayan; Gardas, Ramesh L.
Source:
Energy & fuels 2019 v.33 no.8 pp. 7659-7666
ISSN:
1520-5029
Subject:
acidity,   etc   ; Gibbs free energy; desulfurization; electric field; fuels; ionic liquids; models; nitro compounds; solvation; thiophene;     Show all 10 Subjects
Abstract:
... In the maneuver to achieve desulfurization, we have explored various nitro-substituted positional isomeric imidazolium-based aprotic ionic liquids (ILs). Ortho-, meta-, and para-substituted nitro benzyl group-aided imidazolium-based ILs were synthesized and used to understand the extractive desulfurization (EDS) efficiency of fuels. ILs chosen for the experiment were optimized using the B3LYP meth ...
DOI:
10.1021/acs.energyfuels.9b01279

3. Modified Vermiculite for Hydrocracking of Athabasca Bitumen

Author:
Cortés, Juan Carlos; Scott, Carlos E.; Pereira-Almao, Pedro; Molina, Rafael; Moreno, Sonia
Source:
Energy & fuels 2019 v.33 no.6 pp. 5153-5161
ISSN:
1520-5029
Subject:
acidity,   etc   ; X-ray diffraction; adsorption; ammonia; bitumen; catalysts; catalytic activity; cobalt; desorption; fuels; hydrogen; iron; molybdenum; nickel; nitrogen; porous media; texture; transmission electron microscopy; vermiculite;     Show all 19 Subjects
Abstract:
... A series of catalysts were synthesized by incorporating Mo and W active phases promoted with Co, Ni, or Fe, on a mesoporous delaminated vermiculite. The resulting solids were characterized by X-ray diffraction, temperature-programmed reduction with H₂ (TPR-H₂), temperature-programmed desorption of ammonia (TPD-NH₃), N₂ adsorption/desorption isotherms, and transmission electron microscopy. The cata ...
DOI:
10.1021/acs.energyfuels.9b00938

4. Deoxygenation of Wheat Straw Fast Pyrolysis Vapors using HZSM-5, Al₂O₃, HZSM-5/Al₂O₃ Extrudates, and Desilicated HZSM-5/Al₂O₃ Extrudates

Author:
Eschenbacher, Andreas; Jensen, Peter Arendt; Henriksen, Ulrik Birk; Ahrenfeldt, Jesper; Li, Chengxin; Duus, Jens Øllgaard; Mentzel, Uffe Vie; Jensen, Anker Degn
Source:
Energy & fuels 2019 v.33 no.7 pp. 6405-6420
ISSN:
1520-5029
Subject:
acidity,   etc   ; acid value; aluminum oxide; aromatization; biofuels; carbon; catalysts; crystals; elemental composition; energy; energy recovery; evaporation; flame ionization; fossil fuels; gas chromatography-mass spectrometry; micropores; molecular weight; nuclear magnetic resonance spectroscopy; oils; oxygen; porous media; pyrolysis; silicon carbide; stable isotopes; steam; temperature; wheat straw; zeolites;     Show all 28 Subjects
Abstract:
... HZSM-5 extrudates, its two constituents (HZSM-5 zeolite and alumina binder), and SiC for reference were tested after steam treatment for the upgrading of wheat straw fast pyrolysis (FP) vapors from an ablative bench scale system. In addition, mesoporosity was added to the HZSM-5 crystals of the zeolite/Al₂O₃ extrudates by desilication, which decreased the microporous volume and led to enhanced wea ...
DOI:
10.1021/acs.energyfuels.9b00906

5. Effect of the FCC Equilibrium Catalyst Properties and of the Cracking Temperature on the Production of Fuel from HDPE Pyrolysis Waxes

Author:
Rodríguez, Elena; Palos, Roberto; Gutiérrez, Alazne; Vela, Francisco J.; Arandes, José M.; Bilbao, Javier
Source:
Energy & fuels 2019 v.33 no.6 pp. 5191-5199
ISSN:
1520-5029
Subject:
acidity,   etc   ; alkenes; aromatic compounds; catalysts; catalytic cracking; gases; liquid petroleum gas; oils; petroleum; polyethylene; pyrolysis; temperature; waxes;     Show all 13 Subjects
Abstract:
... The catalytic cracking of high-density polyethylene pyrolysis waxes has been investigated with the aim of promoting the production of fuels. The runs have been conducted in a CREC riser simulator reactor under industrial fluid catalytic cracking conditions: 500–560 °C; catalyst/oil ratio, 5 gcₐₜ gwₐₓ–¹; and contact time, 6 s. Three commercial equilibrium catalysts with different compositions have ...
DOI:
10.1021/acs.energyfuels.9b00993

6. Trade-Off between Acidic Sites and Crystallinity of the WO₃–TiO₂ Catalyst toward Dehydration of Glucose to 5-Hydroxymethylfurfural

Author:
Ganji, Parameswaram; Roy, Sounak
Source:
Energy & fuels 2019 v.33 no.6 pp. 5293-5303
ISSN:
1520-5029
Subject:
acidity,   etc   ; Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; ammonia; catalysts; catalytic activity; combustion; crystal structure; desorption; energy; fuels; glucose; hot water treatment; hydroxymethylfurfural; microwave treatment; pyridines; reaction mechanisms; reflectance spectroscopy; scanning electron microscopes; surface area;     Show all 21 Subjects
Abstract:
... The dehydration of glucose to 5-hydroxymethylfurfural (HMF) is one of the most coveted catalytic reactions from energy and environmental perspective. In spite of the exhaustive work, the understanding of the reaction mechanism is still debated in literatures. Here, the composite WO₃–TiO₂ catalyst was synthesized by different routes such as solution combustion synthesis method and microwave-assiste ...
DOI:
10.1021/acs.energyfuels.9b00461

7. Effects of the Active Phase of CoMo/γ-Al₂O₃ Catalysts Modified Using Cerium and Phosphorus on the HDS Performance for FCC Gasoline

Author:
Xia, Butian; Cao, Liyuan; Luo, Kaiwei; Zhao, Liang; Wang, Xiaoqin; Gao, Jinsen; Xu, Chunming
Source:
Energy & fuels 2019 v.33 no.5 pp. 4462-4473
ISSN:
1520-5029
Subject:
acidity,   etc   ; Bronsted acids; Fourier transform infrared spectroscopy; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; catalysts; catalytic activity; cerium; desulfurization; gasoline; hydrogen; isomerization; molybdenum disulfide; olefin; phosphorus; pollution load; pyridines; slabs; synergism; thiophene; transmission electron microscopy;     Show all 21 Subjects
Abstract:
... The modified CoMo/γ-Al₂O₃ catalysts with different Ce and/or P loading were prepared by the incipient wetness impregnation method. The catalysts were characterized using X-ray fluorescence spectroscopy, N₂-adsorption–desorption, pyridine Fourier transform infrared, H₂ temperature-programmed reduction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The effec ...
DOI:
10.1021/acs.energyfuels.8b04332

8. Phosphorous-Modified Beta Zeolite and Its Performance in Vacuum Gas Oil Hydrocracking Activity

Author:
Manrique, Cecilia; Guzmán, Alexander; Solano, Roger; Echavarría, Adriana
Source:
Energy & fuels 2019 v.33 no.4 pp. 3483-3491
ISSN:
1520-5029
Subject:
acidity,   etc   ; Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; aluminum; ammonia; atomic absorption spectrometry; catalysts; desorption; distillates; energy-dispersive X-ray analysis; fuel oils; hydrogen; magnetism; nitrogen; phosphorus; phosphorus content; phosphorus pentoxide; pyridines; stable isotopes; surface area; transmission electron microscopy; zeolites;     Show all 23 Subjects
Abstract:
... The present work reports the synthesis of beta zeolite and its modification with phosphorous in different percentages of P₂O₅ (1 and 5%) and vacuum gas oil (VGO) hydrocracking (HCK) conversion and yield to naphtha and middle distillates. The solids were characterized by X-ray diffraction, elemental analysis by atomic absorption spectroscopy and inductively coupled plasma atomic emission spectromet ...
DOI:
10.1021/acs.energyfuels.8b04485

9. Efficient Synergetic Combination of H-USY and SnO₂ for Direct Conversion of Glucose into Ethyl Levulinate (Biofuel Additive)

Author:
Heda, Jidnyasa; Niphadkar, Prashant; Bokade, Vijay
Source:
Energy & fuels 2019 v.33 no.3 pp. 2319-2327
ISSN:
1520-5029
Subject:
acidity,   etc   ; biodiesel; catalysts; diesel engines; formic acid; glucose; glucosides; hydroxymethylfurfural; isomerization; levulinic acid; petroleum; reaction mechanisms; tin dioxide; titanium dioxide; zeolites; zirconium oxide;     Show all 16 Subjects
Abstract:
... Ethyl levulinate (EL), a biofuel additive for petroleum and biodiesel can also be used as a 100% fuel to replace petroleum diesel with the existing diesel engine. The major problem to make the EL process economical is the lack of a proper conversion technology to convert C₆ sugars such as glucose with higher yield of EL as well as process which can tolerate higher glucose concentration to increase ...
DOI:
10.1021/acs.energyfuels.8b04395

10. Assessing Waste Cooking Oils for the Production of Quality Biodiesel Using an Electronic Nose and a Stochastic Model

Author:
Siqueira, Adriano F.; Vidigal, Igor G.; Melo, Mariana P.; Giordani, Domingos S.; Batista, Pollyanna S.; Ferreira, Ana L. G.
Source:
Energy & fuels 2019 v.33 no.4 pp. 3221-3226
ISSN:
1520-5029
Subject:
acidity,   etc   ; biodiesel; discriminant analysis; economic feasibility; electronic nose; frying oil; fuel production; iodine value; kitchen waste; laboratory experimentation; lipids; prediction; raw materials; stochastic processes; viscosity; Brazil;     Show all 16 Subjects
Abstract:
... Around 1% of waste cooking oil (WCO) is currently recycled to make biodiesel in Brazil, mainly because used oils can acquire physicochemical characteristics that render them unsuitable as raw materials. To make biofuel production from waste oils and fats more efficient and economically feasible, it is important to develop simple, rapid, and low-cost methods for testing the quality of WCOs. With th ...
DOI:
10.1021/acs.energyfuels.8b04230

11. Catalytic Hydropyrolysis of Biomass Using Molybdenum Sulfide Based Catalyst. Effect of Promoters

Author:
Stummann, Magnus Zingler; Hansen, Asger Baltzer; Hansen, Lars Pilsgaard; Davidsen, Bente; Rasmussen, Søren Birk; Wiwel, Peter; Gabrielsen, Jostein; Jensen, Peter Arendt; Jensen, Anker Degn; Høj, Martin
Source:
Energy & fuels 2019 v.33 no.2 pp. 1302-1313
ISSN:
1520-5029
Subject:
acidity,   etc   ; Fagus; Raman spectroscopy; ammonia; biomass; calcium; carbon; catalysts; cracking; desorption; energy-dispersive X-ray analysis; fluidized beds; fuels; gases; hydrogenation; liquids; molybdates; molybdenum; oxygen; potassium; scanning electron microscopy; temperature; transmission electron microscopy; wood;     Show all 24 Subjects
Abstract:
... Catalytic hydropyrolysis of beech wood was conducted in a fluid bed reactor at 450 °C and a total pressure of 26 bar. The differences in hydrodeoxygenation activity, selectivity, and the resulting product compositions between sulfided Mo/MgAl₂O₄, CoMo/MgAl₂O₄, and NiMo/MgAl₂O₄ catalysts have been investigated. The acidity and molybdate species in the oxide catalyst precursors were characterized wi ...
DOI:
10.1021/acs.energyfuels.8b04191

12. Influence of Support Acidity on the HDS Performance over β-SBA-16 and Al-SBA-16 Substrates: A Combined Experimental and Theoretical Study

Author:
Zheng, Peng; Hu, Di; Meng, Qian; Liu, Cong; Wang, Xilong; Fan, Jiyuan; Duan, Aijun; Xu, Chunming
Source:
Energy & fuels 2019 v.33 no.2 pp. 1479-1488
ISSN:
1520-5029
Subject:
acidity,   etc   ; Bronsted acids; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aluminum; aluminum oxide; catalysts; composite materials; density functional theory; fuels; nitrogen; nuclear magnetic resonance spectroscopy; pyridines; seeds; silicon; stable isotopes; transmission electron microscopy;     Show all 18 Subjects
Abstract:
... A novel composite material β-SBA-16 is successfully synthesized and utilized as the support for the development of hydrodesulfurization (HDS) catalyst. The supports and the corresponding catalysts were characterized by a variety of techniques involving X-ray diffraction, N₂ physisorption, ²⁷Al NMR, Raman, pyridine IR, X-ray photoelectron spectra, and high-resolution transmission electron microscop ...
DOI:
10.1021/acs.energyfuels.8b04133

13. Upgrading of Light Cycle Oil to High-Octane Gasoline through Selective Hydrocracking over Non-Noble Metal Bifunctional Catalysts

Author:
Peng, Chong; Zhou, Zhiming; Cheng, Zhenmin; Fang, Xiangchen
Source:
Energy & fuels 2019 v.33 no.2 pp. 1090-1097
ISSN:
1520-5029
Subject:
acidity,   etc   ; aromatic compounds; catalysts; catalytic activity; gasoline; liquids; oils; streams; surface area;     Show all 9 Subjects
Abstract:
... Three non-noble metal bifunctional catalysts (Ni–W/Hβ–Al₂O₃, Ni–W/HY–Al₂O₃, and Ni–Mo/HY–Al₂O₃) were prepared and applied to the selective hydrocracking of light cycle oil (LCO) into high-octane gasoline. The structures of catalysts were characterized by various techniques, and the catalytic performances were tested at 400 °C, 8.0 MPa, and a liquid hourly space velocity of 0.8 h–¹ using a once-thr ...
DOI:
10.1021/acs.energyfuels.8b04229