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Effects of bifunctional Ni/HZSM-5 and zinc hydrolysis on the yield and quality of bio-crude in sawdust catalytic hydrothermal liquefaction (HTL)

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2017 ASABE Annual International Meeting  1700696.(doi:10.13031/aim.201700696)
Authors:   Shouyun Cheng, Lin Wei
Keywords:   Bio-crude; Hydrothermal liquefaction; Ni/HZSM-5; hydrocarbon; zinc hydrolysis


Hydrothermal liquefaction (HTL) is effective for converting biomass to bio-crude, but direct use of bio-crude derived from biomass HTL remains a challenge due to its low quality. In this study, Ni/HZSM-5 catalysts and zinc hydrolysis were combined to upgrade bio-crude to biofuel in HTL process. The effects of Ni/HZSM-5 and HZSM-5 on the yield and quality of bio-crude and gas were investigated. The results indicate that bifunctional Ni/HZSM-5 catalysts exhibited higher catalyst activities to improve bio-crude quality compared to HZSM-5 catalyst. Ni/HZSM-5 was more effective to convert oxygenated compounds to hydrocarbons due to the integrated cracking and hydrodeoxygenation reactions. Compared to HZSM-5, 6%Ni/HZSM-5 catalyst produced the bio-crude product with the highest hydrocarbon content at 11.02%. HZSM-5 produced the highest bio-crude yield at 64.31 wt.%.

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