1 research outputs found
Two-Stage Hydrothermal Liquefaction of Sweet Sorghum Biomassî—¸Part II: Production of Upgraded Biocrude Oil
The
hydrothermal liquefaction (HTL), followed by hydrodeoxygenation
(HDO) of lignin-rich biomass has a potential to improve the yield
and the quality of upgraded biocrude oil. In this study, the lignin-rich
biomass obtained from the low-temperature HTL (stage 1) of sweet sorghum
bagasse was investigated to evaluate the biocrude oil yield and its
compositions using catalytic high-temperature HTL-HDO (stage 2) and
was compared with the conventional, whole-stage HTL-HDO process. Biocrude
oil yield was achieved up to 38% during a high-temperature HTL, while
42% was obtained after catalytic (5% Ru/C) HDO process. Up to 96%
hydrocarbon content of biocrude oil was achieved, which is twice as
high as that of the conventional whole-stage HTL-HDO process. Aromatic
hydrocarbons and long-chain alkanes were also dominant in the upgraded
biocrude oil, which collectively accounted for 28% of the total hydrocarbons.
From raw sweet sorghum bagasse, the hydrocarbons yield from second-stage
HTL-HDO process (11%) was substantially increased by 78%, compared
to that of the whole-stage HTL-HDO process (7%). The upgraded biocrude
oil could be directly processed or co-processed in the existing refinery
to produce drop-in fuels