scholarly journals Conversion of Residual Palm Oil into Green Diesel and Biokerosene Fuels under Sub- and Supercritical Conditions Employing Raney Nickel as Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 995
Author(s):  
Eduardo Falabella Sousa-Aguiar ◽  
Carolina Zanon Costa ◽  
Maria Antonieta Peixoto Gimenes Couto ◽  
Débora de Almeida Azevedo ◽  
José Faustino Souza de Carvalho Filho

A comprehensive study of the thermal deoxygenation of palm residue under sub- and supercritical water conditions using Raney nickel as a heterogeneous catalyst is presented in this paper. Hydrothermal technology was chosen to replace the need for hydrogen as a reactant, as happens, for example, in catalytic hydrotreatment. Several experiments were carried out at different reaction temperatures (350, 370, and 390 °C) and were analyzed with different times of reaction (1, 3.5, and 6 h) and catalyst loads (5, 7.5, 10 wt.%). No hydrogen was introduced in the reactions, but it was produced in situ. The results showed the selectivity of biokerosene ranged from 2% to 67%, and the selectivity of diesel ranged from 5% to 98%. The best result was achieved for 390 °C, 10 wt.% catalyst load, and 3.5 h of reaction, when the selectivities equal to 67% for biokerosene and 98% for diesel were obtained. The Raney nickel catalyst demonstrated a tendency to promote the decarboxylation reaction and/or decarbonylation reaction over the hydrodeoxygenation reaction. Moreover, the fatty acid and glycerol reforming reaction and the water−gas shift reaction were the main reactions for the in situ H2 generation. This study demonstrated that a hydrothermal catalytic process is a promising approach for producing liquid paraffin (C11−C17) from palm residue under the conditions of no H2 supply.

2013 ◽  
Vol 33 (9) ◽  
pp. 1572-1577 ◽  
Author(s):  
Yuanzhuo ZHANG ◽  
Ziying YU ◽  
Fumin ZHANG ◽  
Qiang XIAO ◽  
Yijun ZHONG ◽  
...  

2021 ◽  
Vol 61 (10) ◽  
pp. 1131-1137
Author(s):  
I. G. Baigildin ◽  
E. A. Karakhanov ◽  
A. L. Maximov ◽  
A. V. Vutolkina

Abstract The feasibility of biphenyl hydrogenation with syngas for hydrogen purification and binding with the aim of its transportation was demonstrated. Specific features of the hydrogenation of biphenyl as a promising organic hydrogen carrier using unsupported Ni–Mo sulfide catalysts were studied. In particular, the influence of temperature, reaction time, presence of water in the system, and Н2/СО gas mixture composition on the substrate conversion and selectivity with respect to products was examined. The highest conversion and the maximal hydrogen uptake are reached at 380°С in 6–8 h. The dispersed catalysts are active in biphenyl hydrogenation at the CO concentration in the Н2/СО gas mixture of up to 50 vol %, and H2O can act in this case as an in situ hydrogen source owing to the occurrence of the water-gas shift reaction.


2020 ◽  
Vol 390 ◽  
pp. 124629 ◽  
Author(s):  
Jose A. Hernandez Lalinde ◽  
Pakpong Roongruangsree ◽  
Jan Ilsemann ◽  
Marcus Bäumer ◽  
Jan Kopyscinski

2020 ◽  
Vol 269 ◽  
pp. 118826 ◽  
Author(s):  
Christopher Panaritis ◽  
Johnny Zgheib ◽  
Sayed A.H. Ebrahim ◽  
Martin Couillard ◽  
Elena A. Baranova

2020 ◽  
Vol 10 (3) ◽  
pp. 768-775
Author(s):  
Ning Liu ◽  
Pan Yin ◽  
Ming Xu ◽  
Yusen Yang ◽  
Shaomin Zhang ◽  
...  

A redox mechanism towards the water-gas shift reaction was certified based on in situ/operando experiments and density functional theory calculation studies.


2016 ◽  
Vol 6 (7) ◽  
pp. 2214-2227 ◽  
Author(s):  
Pratibha L. Gai ◽  
Kenta Yoshida ◽  
Michael R. Ward ◽  
Michael Walsh ◽  
Richard T. Baker ◽  
...  

In situ real time single atom resolution observations of dynamic water gas shift catalysts in CO + water (WGS) environments.


2018 ◽  
Vol 8 (1) ◽  
pp. 344-357 ◽  
Author(s):  
Tanja Bauer ◽  
Robert Stepic ◽  
Patrick Wolf ◽  
Fabian Kollhoff ◽  
Weronika Karawacka ◽  
...  

Ru-based SILP systems efficiently catalyze the low-temperature water-gas shift reaction (WGSR).


2013 ◽  
Vol 53 (3) ◽  
pp. 1064-1072 ◽  
Author(s):  
Melis S. Duyar ◽  
Robert J. Farrauto ◽  
Marco J. Castaldi ◽  
Tuncel M. Yegulalp

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