Hydrorefining of oil from rapeseed cake pyrolysis over NiMo/Al sub(2)O sub(3) catalyst

• Published in: Fuel processing technology Vol. 128; pp. 191 - 198
• Main Authors: Pstrowska, Katarzyna, Walendziewski, Jerzy, Stolarski, Marek
• Format: Journal Article
• Language: English
• Published: 01.12.2014
• Subjects: Aluminum oxide; Boiling; Cakes; Catalysts; Fuels; Pyrolysis; Rapeseed; Refining
• ISSN: 0378-3820
• DOI: 10.1016/j.fuproc.2014.07.035

Bio-oil from rapeseed cake pyrolysis, bio-oil fraction boiling over 120 [degrees]C and bio-oil blended with light gas oil fraction were submitted to the hydrorefining studies. The usability of NiMo/Al sub(2)O sub(3) catalyst for pyrolytic oil hydrorefining was tested at the following parameters: temperature (290-350 [degrees]C), LHSV (0.5-2.0 h super(-1)) and 3 MPa hydrogen pressure. The influence of hydrorefining parameters on the physicochemical properties and chemical composition of the obtained products was evaluated. Hydrorefining of raw bio-oil at the temperature of 350 [degrees]C 2.0 h super(-1) and 3 MPa of H sub(2) resulted in unsatisfactory level of refining. Removal of low boiling fraction and LHSV until the value of 0.5 h super(-1) was reached allowed to deepen the degree of hydro refining up to the levels of 71.4% of HDS, 29.0% of HDN and 78.8% of HDO. These hydrorefining products cannot be used as internal combustion engine liquid fuels or as their components. Blending of the biooil (20% v/v) with petroleum-derived oil fraction and subjecting it to a hydrorefining process made it possible to obtain a fuel component of relatively good quality.