Catalytic hydropyrolysis of biomass using supported CoMo catalysts – Effect of metal loading and support acidity

Effect of Calcium Doping Using Aqueous Phase Reforming of Glycerol over Sonochemically Synthesized Nickel-Based Supported ZrO2 Catalyst

“…Besides that, it is also observed that the glycerol conversion decreased with an increase in metal loading for both the Us and WI methods (Table 2). This might be caused by the decrease in the catalyst activity due to particles' agglomeration, which resulted in a smaller surface area and active sites for the reaction to occur [37].…”

“…Besides that, it is also observed that the glycerol conversion decreased with an increase in metal loading for both the Us and WI methods (Table 2). This might be caused by the decrease in the catalyst activity due to particles' agglomeration, which resulted in a smaller surface area and active sites for the reaction to occur [37]. 1,2-PDO can then be further converted into acetone or propanol, which were also identified among the products produced via this reaction, whereas ethylene glycol (EG) was produced only as a minor product via dehydrogenation of glycerol to 2,3-dihydroxypropanal and decarbonylation of 2,3-dihydroxypropanal to EG.…”

Biorefinery via Catalytic Upgraded Fast Pyrolysis of Biomass

“…Hydropyrolysis (CFHP) is the technology that it uses an hydrogenation catalyst together with a fast pyrolysis reaction and H2, in order to reduce the amount of aromatics transforming them in alkanes, to reduce the char and to produce methane as gas. Hydopyrolysis of biomass is the combination of fast pyrolysis and catalytic hydrodehoxygenation of biomass to produce directly renewable diesel and gasoline from biomass [39][40][41] The presence of hydrogen in the CFHP reactor increases carbon efficiency by shifting reaction pathway from decarbonylation and decarboxylation to dehydration, thus removing oxygen in the form of water. Inclusion of a ZSM-5 catalyst in the CFHP reactor assists in pyrolysis vapor deoxygenation and char reduction, while the presence of a transition metal, such as Ni or Ru may assist in hydrogenation reactions working at 35bar.…”

Hydrodeoxygenation of fatty acid methyl esters and simultaneous products isomerization over bimetallic Ni‐Co / SAPO ‐11 catalysts

“…[8][9][10][11] Therefore, hydrodeoxygenation (HDO) of FAMEs, involving hydrogenation and deoxygenation of FAMEs with hydrogen over catalysts to generate C 15-18 dieselrange hydrocarbons, has received a great attention in recent years, since the properties of the obtained hydrocarbons are similar to those of petro-diesel. 12,13 Conventional hydrodesulphurization (HDS) catalysts [14][15][16][17] (supported sulfided metal catalysts) and hydrogenation catalysts [18][19][20][21][22][23] (supported noble metal catalysts) have been commonly applied in the HDO process, and exhibit high activity for obtaining long-chain alkanes from FAMEs. Nevertheless, the sulfided metal catalysts undergo deactivation by oxidation of active sulfided phase during the HDO reaction and thus necessitate addition of sulfiding agent to maintain their catalytic activity, which will contaminate the final products by sulfur and increase the operation costs.…”