Highly selective Co3O4/silica-alumina catalytic system for deoxygenation of triglyceride-based feedstock

Hydrodeoxygenation of aliphatic acid over NiFe intermetallic compounds: Insights into the mechanism via model compound study

“…The alkanes produced through hydrodeoxygenation (HDO) of the renewable triglyceride are called the second generation of biodiesel and have attracted much attention [4][5][6]. Compared with the aliphatic acid alkyl esters, the deoxygenated biodiesel possesses a higher cetane number, better stability, better flow property, and lower cloud point [7]. As the molecular structure is similar to that of petro-diesel, the second generation of biodiesel can be used in the current diesel engines directly.…”

“…To improve the conversion of aliphatic acid and the selectivity of alkane products, lots of efforts have been devoted to the catalysts. To date, many kinds of catalysts including the traditional sulphided catalysts [16,17], noble metal [10,18], and transition metal catalysts [19], as well as the metal phosphide [8], nitride [20], and oxide catalysts [7] have been studied in the HDO of aliphatic acid. And the influence of support was also considered in some studies [1,21].…”

“…Compared with noble metal catalysts, non-noble transition metal catalysts are more attractive in the industrial magnification. And the non-noble transition metals are also easier to be prepared as alloys or other compounds [7,8,20], which will bring more possibility to the selection of catalyst.…”

Cobalt–Alumina Coprecipitated Catalysts for Green Diesel Production

“…The relatively low SDO efficiency of the 55CoAl 400 catalyst with respect to that exhibited by the 55CoAl 500 one should be attributed to the presence of CoO as a predominant cobalt phase in the 55CoAl 400 catalyst (XRD, electron diffraction, H 2 -TPR), which is less efficient than metallic cobalt and results in a lower population of very active Co 0 /CoO interface sites. Soni et al 47 proved the SDO performance of cobalt oxide phase for deoxygenation of a triglyceride-based feedstock. Thus, the existence of cobalt oxide and the development of remarkable surface (H 2 -TPD) created by small Co 0 nanoparticles (H 2 -TPR) not detectable by XRD, in conjunction with the very high value of SSA BET (Table 1) exhibited by 55CoAl 400 catalyst, could explain its remarkable SDO activity.…”

Studies on the catalytic hydrothermal liquefaction of sugarcane bagasse to bio-oil, over cobalt oxide

“…The second step and thus the bio-oil yield depends upon the activity of the externally added catalyst and the process parameters [12]. Soni et al reported that the cobalt oxide catalyst was effective for the deoxygenation of jatropha and palm oil to hydrocarbons [14].…”