Investigation of the production of high cetane number bio gas oil from pre-hydrogenated vegetable oils over Pt/HZSM-22/Al2O3

摘要

A new field of the catalytic application of Pt/HZSM-22/Al2O3 catalysts for the isomerization of pre-hydrogenated sunflower oils (PHSO) aiming the production of diesel fuel is presented.High cetane number blending components that are practically free of sulfur (<1 ppm) and of aromatic compounds are required for satisfying environmental and human health regulations as well as specifications of diesel fuels in the European Union (cetane number:min 51;CFPP:max -20 °C depending on the climate of the country).Experiments were carried out over catalysts containing 0.25-1.1% platinum on HZSM-22 at temperatures of 280-370 °C,total pressures of 35-80 bar;liquid hourly space velocities (LHSV) of 1.0-4.0 h_1,H2 to hydrocarbon ratios of 250-400 Nm3/m3.Results indicated that the yield of liquid products obtained under favorable process conditions was >90%,the ratio of i--paraffins was in the range of 3.7:1-4.7:1,cetane numbers were 81-84 units and CFPP values were between -18 and -14 °C.These are excellent blend stocks of diesel fuels.