TY - JOUR
T1 - Automotive sustainable diesel blendstock production through biocrude obtained from hydrothermal liquefaction of municipal solid waste
AU - Kohansal, Komeil
AU - Lozano Sanchez, Eliana
AU - Khare, Shivang
AU - Oskar Pires Bjørgen, Karl
AU - Salman Haider, Muhammad
AU - Castello, Daniele
AU - Løvås, Terese
AU - Aistrup Rosendahl, Lasse
AU - Helmer Pedersen, Thomas
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/10/15
Y1 - 2023/10/15
N2 - Hydrothermal liquefaction (HTL) bio-crude is known as a potential alternative to conventional fossil fuels in the existing infrastructure. Although HTL has enormous potential as a process for renewable fuel production, developing economically viable HTL-based value-chains has encountered extensive challenges owing to the contaminants and the complex matrix it possesses. Therefore, devising efficient downstream processing and blending strategies is of high importance. This study evaluates different bio-crude refining scenarios; namely 1) pre-stabilization using partial hydrotreating, 2) fractionation through vacuum distillation and 3) the integration of the former processes, in producing a compliant HTL-derived road diesel blendstock. The combination of the distillation fractions is optimized through a multi-objective optimization method minimizing the deviation from the road diesel standard specifications. The optimized blend fuels are combusted in an optical accessible compression-ignited chamber (OACIC) to assess the exhaust emissions. Partial hydrotreating successfully improves the distillation recovery from 22.7 wt% (raw bio-crude) to 55.6 wt% along with a significant improvement in the physicochemical properties. The hydrotreated bio-crude distillate mixture is an adequate diesel blendstock that complies with the standard specification by at least 5 wt% contribution to the finished fuel. The results also show that with a slight improvement in the desulphurization of bio-crude, the bio-blendstock share can increase up to 10 wt%. With the comparable GHG emission profile to the reference diesel, the hydrotreated bio-crude distillate mixture heralds a promising green blendstock that can significantly contribute to meeting the current road transport diesel fuel demand.
AB - Hydrothermal liquefaction (HTL) bio-crude is known as a potential alternative to conventional fossil fuels in the existing infrastructure. Although HTL has enormous potential as a process for renewable fuel production, developing economically viable HTL-based value-chains has encountered extensive challenges owing to the contaminants and the complex matrix it possesses. Therefore, devising efficient downstream processing and blending strategies is of high importance. This study evaluates different bio-crude refining scenarios; namely 1) pre-stabilization using partial hydrotreating, 2) fractionation through vacuum distillation and 3) the integration of the former processes, in producing a compliant HTL-derived road diesel blendstock. The combination of the distillation fractions is optimized through a multi-objective optimization method minimizing the deviation from the road diesel standard specifications. The optimized blend fuels are combusted in an optical accessible compression-ignited chamber (OACIC) to assess the exhaust emissions. Partial hydrotreating successfully improves the distillation recovery from 22.7 wt% (raw bio-crude) to 55.6 wt% along with a significant improvement in the physicochemical properties. The hydrotreated bio-crude distillate mixture is an adequate diesel blendstock that complies with the standard specification by at least 5 wt% contribution to the finished fuel. The results also show that with a slight improvement in the desulphurization of bio-crude, the bio-blendstock share can increase up to 10 wt%. With the comparable GHG emission profile to the reference diesel, the hydrotreated bio-crude distillate mixture heralds a promising green blendstock that can significantly contribute to meeting the current road transport diesel fuel demand.
KW - Diesel blendstock
KW - Hydrothermal liquefaction
KW - Hydrotreating
KW - Internal combustion
KW - Vacuum distillation
UR - http://www.scopus.com/inward/record.url?scp=85160691234&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2023.128770
DO - 10.1016/j.fuel.2023.128770
M3 - Journal article
AN - SCOPUS:85160691234
SN - 0016-2361
VL - 350
JO - Fuel
JF - Fuel
M1 - 128770
ER -