One-pot catalytic hydrocracking of diesel distillate and residual oil fractions obtained from bio-oil to gasoline-range hydrocarbon fuel

About the author

Xianwei Zheng, Ph.D. candidate, The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, China

Xianwei Zheng received his bachelor degree from Henan Institute of Science and Technology, China in 2010. She worked as a Master and PhD student at South China University of Technology from 2010 to 2015. Her research focused on classified separation and catalytic hydrotreatment of bio-oil. 

About the author

Dr. Jie Chang graduated in Chemical Engineering from the Research Institute of Petroleum Processing (Sinopec Group), China.  He is a Professor in the School of Chemistry and Chemical Engineering at South China University of Technology.  His current research interests focus on the conversion of biomass into commercially valuable products such as biofuels, biobased materials and platform chemicals. 

About the author

Yan Fu  Associate Professor

School of Chemistry and Chemical Engineering, South China University of Technology,China. Main research field is biomass conversion to liquid fuel and high-valued chemicals. 

Journal Reference

Fuel, Volume 157,2015, Pages 107–114.

Xianwei Zheng, Jie Chang, Yan Fu*

Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381#, Guangzhou 510640, China

Abstract

Bio-oil can be fractionated into three parts according to their boiling point. Here we report that diesel distillate and residual oil fractions can be converted into high-quality fuels by catalytic hydrocracking with the combined CoMoS/Al2O3 and HZSM-5 catalysts. Under the conditions of 390 ℃ and 6 MPa H2, a high yield (87.0 wt.%) of liquid products was obtained. The compositions were C7–C14 hydrocarbons, including 23.3% of saturated naphthene, 23.4% of saturated chain hydrocarbons, 30.5% of aromatic hydrocarbons, and 22.8% of polycyclic aromatic hydrocarbons with one of ring saturated. The high heating value of products was 42.35 MJ/kg. The amounts of coking was only 1.15 wt.%, and the combined catalysts were

recycled three times without the obvious decline of activity. Moreover, the reaction process did not need any solvent, and the products were easily separated. Based on the material balance, the net hydrogen consumption for the hydrocracking process was 38 g of H2/kg of bio-oil, and the energy efficiency could reach up to 84%. This approach provides a high-efficiency route for the preparation of high-quality hydrocarbon fuel from bio-oil.

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