Hydrodeoxygenation of oleic acid using γ-Al2O3 supported transition metallic catalyst systems: Insight into the development of novel FeCu/γ-Al2O3 catalyst

2021 ◽  
pp. 111526
Author(s):  
Naveenji Arun ◽  
Sonil Nanda ◽  
Yongfeng Hu ◽  
Ajay K. Dalai
Keyword(s):  
Oleic Acid ◽  
Metallic Catalyst ◽  
Catalyst Systems ◽  
Al2o3 Catalyst ◽  
Insight Into

scholarly journals Hydroprocessing of Oleic Acid for Production of Jet-Fuel Range Hydrocarbons over Cu and FeCu Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1051
Author(s):  
Afees A. Ayandiran ◽  
Philip E. Boahene ◽  
Ajay K. Dalai ◽  
Yongfeng Hu
Keyword(s):  
Oleic Acid ◽  
Photoelectron Spectroscopy ◽  
Textural Properties ◽  
Acid Sites ◽  
Jet Fuel ◽  
Metal Dispersion ◽  
X Ray ◽  
Metal Support Interaction ◽  
High Metal ◽  
Al2o3 Catalyst

In the present study, a series of monometallic Cu/SiO2-Al2O3 catalysts exhibited immense potential in the hydroprocessing of oleic acid to produce jet-fuel range hydrocarbons. The synergistic effect of Fe on the monometallic Cu/SiO2-Al2O3 catalysts of variable Cu loadings (5–15 wt%) was ascertained by varying Fe contents in the range of 1–5 wt% on the optimized 13% Cu/SiO2-Al2O3 catalyst. At 340 °C and 2.07 MPa H2 pressure, the jet-fuel range hydrocarbons yield and selectivities of 51.8% and 53.8%, respectively, were recorded for the Fe(3)-Cu(13)/SiO2-Al2O3 catalyst. To investigate the influence of acidity of support on the cracking of oleic acid, ZSM-5 (Zeolite Socony Mobil–5) and HZSM-5(Protonated Zeolite Socony Mobil–5)-supported 3% Fe-13% Cu were also evaluated at 300–340 °C and 2.07 MPa H2 pressure. Extensive techniques including N2 sorption analysis, pyridine- Fourier Transform Infrared Spectroscopy (Pyridine-FTIR), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), and H2-Temperature Programmed Reduction (H2-TPR) analyses were used to characterize the materials. XPS analysis revealed the existence of Cu1+ phase in the Fe(3)-Cu(13)/SiO2-Al2O3 catalyst, while Cu metal was predominant in both the ZSM-5 and HZSM-5-supported FeCu catalysts. The lowest crystallite size of Fe(3)-Cu(13)/SiO2-Al2O3 was confirmed by XRD, indicating high metal dispersion and corroborated by the weakest metal–support interaction revealed from the TPR profile of this catalyst. CO chemisorption also confirmed high metal dispersion (8.4%) for the Fe(3)-Cu(13)/SiO2-Al2O3 catalyst. The lowest and mildest Brønsted/Lewis acid sites ratio was recorded from the pyridine–FTIR analysis for this catalyst. The highest jet-fuel range hydrocarbons yield of 59.5% and 73.6% selectivity were recorded for the Fe(3)-Cu(13)/SiO2-Al2O3 catalyst evaluated at 300 °C and 2.07 MPa H2 pressure, which can be attributed to its desirable textural properties, high oxophilic iron content, high metal dispersion and mild Brønsted acid sites present in this catalyst.

Design and Preparation of Heterogeneous Catalysts by Controlled Chemical Reactions with Oxygen and Hydrogen

1994 ◽  
Vol 368 ◽  
Author(s):  
David L. Cocke ◽  
Donald G. Naugle ◽  
Thomas R. Hess
Keyword(s):  
Chemical Reactions ◽  
Heterogeneous Catalysts ◽  
Formation Processes ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Reduction Processes ◽  
Alloy Oxidation ◽  
Reaction Models ◽  
Catalyst Systems ◽  
Insight Into

ABSTRACTChemical reactions of metals and strongly interacting alloys such as Cu-Mn, Ni-Ti, Ni-Hf and Ni-Zr with oxygen and hydrogen play important roles in the preparation, activation, and regeneration of many important heterogeneous catalytic systems involving supported and unsupported metals and alloys. Recent advances in the understanding of metal and alloy oxidation is bringing new insight into the reactive design and activation of bi- and multi-metallic catalysts. By surface studies of oxidation, thermal annealing and reduction of selected alloys and their thin films and reaction layers and products we have been able to delineate the factors which are most important to the oxide formation processes and the oxide reduction processes. Reaction models developed from these results are permitting the design of new catalyst systems and providing long sought understanding to explain specific aspects of well established metallic catalysts.

A comprehensive insight into the role of barium in catalytic performance of Co/Al2O3 catalyst for Fischer-Tropsch synthesis

Fuel ◽  
2019 ◽  
Vol 256 ◽  
pp. 115911 ◽  
Author(s):  
Shupeng Guo ◽  
Qiang Wang ◽  
Min Wang ◽  
Zhongyi Ma ◽  
Jungang Wang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Al2o3 Catalyst ◽  
Insight Into

Methanation of CO2: Further insight into the mechanism over Rh/γ-Al2O3 catalyst

2012 ◽  
Vol 113-114 ◽  
pp. 2-10 ◽  
Author(s):  
Antoine Beuls ◽  
Colas Swalus ◽  
Marc Jacquemin ◽  
George Heyen ◽  
Alejandro Karelovic ◽  
...  
Keyword(s):  
Al2o3 Catalyst ◽  
Insight Into

Hydrodesulphurization of Thiophenes over CoMoRe/ ZSM 5gama-Al2O3 Catalyst

2018 ◽  
Vol 69 (6) ◽  
pp. 1386-1390
Author(s):  
Rami Doukeh ◽  
Mihaela Bombos ◽  
Marioara Moldovan ◽  
Ion Bolocan
Keyword(s):  
Pore Volume ◽  
Pore Diameter ◽  
Fixed Bed ◽  
Texture Features ◽  
Molar Ratio ◽  
Catalytic Reactor ◽  
Average Pore ◽  
Metallic Catalyst ◽  
C 30 ◽  
Al2o3 Catalyst

The hydrodesulphurization (HDS) of thiophenes was performed on metallic catalyst CoMoRe/ZSM5-gAl2O3. Experiments were carried out on a fixed bed catalytic reactor at 175-300�C, 30-60 atm, thiophene volume hourly space velocities of 1h-1- 4h-1 and molar ratio hydrogen/thiophene of 60/1. Texture features like specific surface area, the pore volume and the average pore diameter decrease after catalyst sulfurization. The thiophenes conversion on CoMoRe/gAl2O3-Zn-HZSM 5 catalyst differs with the nature of the studied thiophenes.

Insight into the effects of different ageing protocols on Rh/Al2O3 catalyst

2014 ◽  
Vol 308 ◽  
pp. 230-236 ◽  
Author(s):  
Baohuai Zhao ◽  
Rui Ran ◽  
Yidan Cao ◽  
Xiaodong Wu ◽  
Duan Weng ◽  
...  
Keyword(s):  
Al2o3 Catalyst ◽  
Insight Into

scholarly journals Catalytic Conversion of Free Fatty Acids to Bio-Based Aromatics: A Model Investigation Using Oleic Acid and an H-ZSM-5/Al2O3 Catalyst

2021 ◽  
Vol 9 (3) ◽  
pp. 1128-1141
Author(s):  
Songbo He ◽  
Frederike Gerda Hiltje Klein ◽  
Thomas Sjouke Kramer ◽  
Anshu Chandel ◽  
Zhuorigebatu Tegudeer ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Free Fatty Acids ◽  
Catalytic Conversion ◽  
Model Investigation ◽  
Al2o3 Catalyst

Insight into forced hydrogen re-arrangement and altered reaction pathways in a protocol for CO2 catalytic processing of oleic acid into C8–C15 alkanes

2017 ◽  
Vol 19 (17) ◽  
pp. 4157-4168 ◽  
Author(s):  
Shiyou Xing ◽  
Pengmei Lv ◽  
Haoran Yuan ◽  
Lingmei Yang ◽  
Zhongming Wang ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Reaction Pathways ◽  
Liquid Products ◽  
Catalytic Processing ◽  
Insight Into

A protocol for CO2 enhanced processing of oleic acid for C8–C15 alkane production is proposed where intrinsic hydrogen in oleic acids is re-arranged in final liquid products.

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