Effect of Support Acidic Properties on Sulfur Tolerance of Pd Catalysts for Partial Hydrogenation of Rapeseed Oil-Derived FAME

2012 ◽  
Vol 89 (11) ◽  
pp. 2117-2120 ◽  
Author(s):  
Natthida Numwong ◽  
Apanee Luengnaruemitchai ◽  
Nuwong Chollacoop ◽  
Yuji Yoshimura
Keyword(s):  
Rapeseed Oil ◽  
Partial Hydrogenation ◽  
Sulfur Tolerance ◽  
Acidic Properties ◽  
Pd Catalysts ◽  
Effect Of Support

Reaction pathways for the HDO of guaiacol over supported Pd catalysts: Effect of support type in the deoxygenation of hydroxyl and methoxy groups

2021 ◽  
pp. 111491
Author(s):  
Camila A. Teles ◽  
Priscilla M. de Souza ◽  
Raimundo C. Rabelo-Neto ◽  
Alejandra Teran ◽  
Gary Jacobs ◽  
...  
Keyword(s):  
Reaction Pathways ◽  
Pd Catalysts ◽  
Supported Pd Catalysts ◽  
Methoxy Groups ◽  
Effect Of Support ◽  
Supported Pd

Hydrodeoxygenation of Phenol over Pd Catalysts. Effect of Support on Reaction Mechanism and Catalyst Deactivation

ACS Catalysis ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 2058-2073 ◽  
Author(s):  
Priscilla M. de Souza ◽  
Raimundo C. Rabelo-Neto ◽  
Luiz E. P. Borges ◽  
Gary Jacobs ◽  
Burtron H. Davis ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Catalyst Deactivation ◽  
Pd Catalysts ◽  
Effect Of Support

Hydrogenation of Toluene over Supported Pt and Pd Catalysts: Influence of Structural Factors on the Sulfur Tolerance

2002 ◽  
Vol 212 (1) ◽  
pp. 63-75 ◽  
Author(s):  
K. Thomas ◽  
C. Binet ◽  
T. Chevreau ◽  
D. Cornet ◽  
J.-P. Gilson
Keyword(s):  
Structural Factors ◽  
Sulfur Tolerance ◽  
Pd Catalysts ◽  
Hydrogenation Of Toluene

scholarly journals Efficient hydrothermal deoxygenation of tall oil fatty acids into n-paraffinic hydrocarbons and alcohols in the presence of aqueous formic acid

2020 ◽  
Author(s):  
Lakhya Jyoti Konwar ◽  
Benedetta Oliani ◽  
Ajaikumar Samikannu ◽  
Paolo Canu ◽  
Jyri-Pekka Mikkola
Keyword(s):  
Fatty Acids ◽  
Formic Acid ◽  
Rapeseed Oil ◽  
Reaction Pathway ◽  
Kinetic Studies ◽  
Tall Oil ◽  
Pd Catalysts ◽  
Catalytic Systems ◽  
Tall Oil Fatty Acids ◽  
Aqueous Formic Acid

Abstract Hydrothermal deoxygenation of tall oil fatty acids (TOFA) was investigated in the presence of aqueous formic acid (0.5–7.5 wt%) as a H2 donor in the presence of subcritical H2O pressure (569–599 K). Pd and Ru nanoparticles supported on carbon (5% Pd/CSigma, 5% Ru/CSigma, 10% Pd/CO850_DP, and 5% Ru/COPcomm_DP) were found to be efficient catalysts for deoxygenation of TOFA. The reaction pathway was mainly influenced by the concentration of formic acid and the catalyst. In case of Pd catalysts, in the presence of 0–2.5 wt% formic acid, decarboxylation was the dominant pathway producing n-paraffinic hydrocarbons with one less carbon atom (heptadecane yield up to 94 wt%), while with 5–7.5% formic acid, a hydrodeoxygenation/hydrogenation mechanism was favored producing C18 deoxygenation products octadecanol and octadecane as the main products (yields up to 70 wt%). In contrast, Ru catalysts produced a mixture of C5-C20 (n-and iso-paraffinic) hydrocarbons via decarboxylation, cracking and isomerization (up to 58 wt% C17 yield and total hydrocarbon yield up to 95 wt%) irrespective of formic acid concentration. Kinetic studies showed that the rates of deoxygenation displayed Arrhenius type behavior with apparent activation energies of 134.44 ± 31.36 kJ/mol and 148.92 ± 3.66 kJ/mol, for the 5% Pd/CSigma and 5% Ru/CSigma catalyst, respectively. Furthermore, the experiments with glycerol tristearate, rapeseed oil, sunflower oil, rapeseed biodiesel, and hydrolyzed rapeseed oil produced identical products confirming the versatility of the aforementioned catalytic systems for deoxygenation of C18 feedstocks.

Catalytic upgrading of soybean oil methyl esters by partial hydrogenation using Pd catalysts

Fuel ◽  
2016 ◽  
Vol 163 ◽  
pp. 8-16 ◽  
Author(s):  
Chachchaya Thunyaratchatanon ◽  
Apanee Luengnaruemitchai ◽  
Nuwong Chollacoop ◽  
Yuji Yoshimura
Keyword(s):  
Soybean Oil ◽  
Methyl Esters ◽  
Partial Hydrogenation ◽  
Pd Catalysts ◽  
Catalytic Upgrading

scholarly journals Effect of Support on the Performance of CoMoRe Catalyst in Thiophene and Benzothiophene Hydrodesulfurization

2019 ◽  
Vol 70 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Rami Doukeh ◽  
Mihaela Bombos ◽  
Daniela Popovici ◽  
Minodora Pasare ◽  
Ion Bolocan
Keyword(s):  
Aqueous Solutions ◽  
Pore Size Distribution ◽  
Pore Volume ◽  
Impregnation Method ◽  
Acidic Properties ◽  
Dimethyl Disulphide ◽  
Temperature And Pressure ◽  
Benzothiophene Hydrodesulfurization ◽  
Effect Of Support ◽  
Selection Of

This work is aimed at selection of a suitable support for CoMoRe catalyst in hydrodesulfurization (HDS) of thiophenes. g-Al2O3 and g-Al2O3-HMS were used as a support for CoMoRe catalyst with 4%Co, 8%Mo and 0.5%Re loading. The metal loading was incorporated by using the pore volume impregnation method, employing aqueous solutions of cobalt (II) nitrate, ammonium molibdate and rhenium (VII) oxide. The catalysts were sulfided with dimethyl disulphide at 250 �C for 10 h and finally tested in the HDS reaction of thiophene and benzothiophene in different temperature and pressure conditions. The catalysts were characterized by determining the adsorption isotherms, the pore size distribution and the acid strengt, FTIR, XRD and S EM. T he catalyst supported on g - Al2O3 displayed higher activity than catalyst supported on g-Al2O3-HMS. The results suggest that activity is favoured by the suitable textural and acidic properties of the support.

scholarly journals Sulfur-tolerance of Al2O3- and TiO2-supported Bimetallic Pt-Pd Catalysts for Naphthalene Hydrogenation

2003 ◽  
Vol 46 (5) ◽  
pp. 315-321 ◽  
Author(s):  
Koki ITO ◽  
Kaori SATOH ◽  
Tadahiro TOMINO ◽  
Masao MIYAKE ◽  
Masa-aki OHSHIMA ◽  
...  
Keyword(s):  
Sulfur Tolerance ◽  
Pd Catalysts

Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation

2008 ◽  
Vol 126 (3-4) ◽  
Author(s):  
Terachai Sirikajorn ◽  
Okorn Mekasuwandumrong ◽  
Piyasan Praserthdam ◽  
James G. Goodwin ◽  
Joongjai Panpranot
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Crystallite Size ◽  
Pd Catalysts ◽  
Liquid Phase Hydrogenation ◽  
Supported Pd Catalysts ◽  
Effect Of Support ◽  
Supported Pd

scholarly journals Renewable Hydrocarbon Production via Rapeseed Oil Hydrotreatment Over Palladium Catalysts

2021 ◽  
Vol 897 (1) ◽  
pp. 012012
Author(s):  
I Malina ◽  
K Malins ◽  
M Strods-Vavilovs ◽  
V Uleiskis
Keyword(s):  
Palladium Catalysts ◽  
Rapeseed Oil ◽  
Narrow Range ◽  
Liquid Hydrocarbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Hydrocarbon Synthesis ◽  
Saturated Hydrocarbons ◽  
Pd Catalysts ◽  
Hydrocarbon Production ◽  
Supported Palladium

Abstract The effect of SiO2-Al2O3 (Pd5%/SA), activated carbon (Pd5%/C) and Al2O3 (Pd5%/A) supported palladium (5%) catalysts on renewable hydrocarbon synthesis via rapeseed oil hydrotreatment was investigated. The hydrotreatment experiments were carried out in solvent free medium under initial H2 pressure 100 bar and at 340 °C temperature for 120 min using catalyst amount 5%. Gas chromatography-mass spectrometry (GC/MS) analysis were used for estimation of hydrocarbon content in the obtained samples. Pd5%/SA catalyst provided complete conversion of rapeseed oil into marketable liquid renewable hydrocarbons without presence of oxygen containing substances under studied hydrotreatment conditions. Moreover, all tested Pd catalysts gave narrow range of linear saturated hydrocarbons (n-C15-C19). Pd5%/C and Pd5%/A catalysts gave partial feedstock conversion into hydrocarbons even in long residence time. Overall liquid hydrocarbon yields were from 55.3% to 82.3%.

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