Samia A Hanafi, Ghada Eshaq and Mamdouh S Elmelawy
Egyptian Petroleum Research Institute, Egypt
Posters & Accepted Abstracts: Int J Appl Sci Res Rev
Our aim was to investigate the possibilities of the production of gas oil like hydrocarbons via the selective deoxygenation (SDO) realized by hydro treatment of waste chicken fat (WCF). We applied CoMoLa/Al2O3 catalyst in its sulfide and reduced state. The reactions were carried out in a fixed bed down flow reactor at reaction temperatures: 350-450 °C, operating pressure: 3, 7 and 8 MPa, liquid-hourly space-velocity (LHSV): 2.0, 4.0 h-1, at a fixed H2/feedstock ratio: 450 Nm3/Nm3 he gaseous and liquid products were analyzed using gas chromatography (GC). Selective deoxygenation of WCF has resulted to the production of nC16- nC18 hydrocarbons, i.e. a liquid mixture within the boiling point range of diesel fuel. It seems that the catalytic hydrodeoxygenation is favored over the sulfide CoMoLa/Al2O3 catalyst, while decarboxylation and decarbonylation are favored over the reduced CoMoLa/Al2O3 catalyst. Reactions including decarboxylation and decarbonylation that generate CO2 and CO can be suppressed at higher pressure and lower LHSV. The amount of H2 consumed during the deoxygenation was larger using the reduced catalyst owing to the methanation reaction, resulting in high dependency of product composition on the initial hydrogen pressure, temperature, as well as LHSV.