@article{
 title = {Continuous-flow production of petroleum-replacing fuels from highly viscous Kraft lignin pyrolysis oil using its hydrocracked oil as a solvent},
 type = {article},
 year = {2020},
 keywords = {CoMo/Hβ,Hydrocracking,Hydrodeoxygenation,Lignin pyrolysis oil,Viscosity},
 volume = {213},
 month = {6},
 publisher = {Elsevier Ltd},
 day = {1},
 id = {bbf02c9a-94ec-3074-86e5-8490c04f6301},
 created = {2020-05-07T10:53:07.310Z},
 file_attached = {true},
 profile_id = {e2d2f261-b93b-3381-802e-ec4f45d345ec},
 last_modified = {2020-05-07T10:53:10.194Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {The development of solvent-free lignin pyrolysis processes is highly desirable, because these processes would allow the depolymerized product to be used directly as a renewable energy source and chemical feedstock, without removal of solvnets. However, this product is typically highly viscous and cannot be used in continuous-flow reaction systems. In this study, lignin pyrolysis oil was prepared from Kraft lignin using bench-scale fixed-bed batch pyrolysis and then hydrocracked to produce less-viscous liquid products. Oligomers were degraded into smaller molecules via reactions involving hydrogen (hydrocracking) using CoMo/Hβ and CoMo/Al2O3 as catalysts. A low viscosity of 21 cP, a liquid yield of 76.6%, and a low coke yield of 1.6% were successfully attained using a reaction temperature of 400 °C, a reaction time of 60 min, and the CoMo/Hβ catalyst. Thus, these conditions were selected to achieve the highest liquid yield with sufficient fluidity, although the lowest viscosity of 3.2 cP was achieved after 240 min. When 30 wt% of the resulting hydrocracked oil was used, it dissolved sticky raw lignin pyrolysis oil, significantly reducing its viscosity from 751 cP to 111 cP, which is sufficient to ensure flow in a typical petroleum pipeline. Using the hydrocracked/raw lignin pyrolysis oil mixture, the proposed continuous-flow hydrodeoxygenation successfully produced petroleum-replacing deoxygenated fuels.},
 bibtype = {article},
 author = {Kim, Yoonsoo and Shim, Jingi and Choi, Jae Wook and Jin Suh, Dong and Park, Young Kwon and Lee, Ung and Choi, Jungkyu and Ha, Jeong Myeong},
 doi = {10.1016/j.enconman.2020.112728},
 journal = {Energy Conversion and Management}
}

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However, this product is typically highly viscous and cannot be used in continuous-flow reaction systems. In this study, lignin pyrolysis oil was prepared from Kraft lignin using bench-scale fixed-bed batch pyrolysis and then hydrocracked to produce less-viscous liquid products. Oligomers were degraded into smaller molecules via reactions involving hydrogen (hydrocracking) using CoMo/Hβ and CoMo/Al2O3 as catalysts. A low viscosity of 21 cP, a liquid yield of 76.6%, and a low coke yield of 1.6% were successfully attained using a reaction temperature of 400 °C, a reaction time of 60 min, and the CoMo/Hβ catalyst. Thus, these conditions were selected to achieve the highest liquid yield with sufficient fluidity, although the lowest viscosity of 3.2 cP was achieved after 240 min. When 30 wt% of the resulting hydrocracked oil was used, it dissolved sticky raw lignin pyrolysis oil, significantly reducing its viscosity from 751 cP to 111 cP, which is sufficient to ensure flow in a typical petroleum pipeline. Using the hydrocracked/raw lignin pyrolysis oil mixture, the proposed continuous-flow hydrodeoxygenation successfully produced petroleum-replacing deoxygenated fuels.","bibtype":"article","author":"Kim, Yoonsoo and Shim, Jingi and Choi, Jae Wook and Jin Suh, Dong and Park, Young Kwon and Lee, Ung and Choi, Jungkyu and Ha, Jeong Myeong","doi":"10.1016/j.enconman.2020.112728","journal":"Energy Conversion and Management","bibtex":"@article{\n title = {Continuous-flow production of petroleum-replacing fuels from highly viscous Kraft lignin pyrolysis oil using its hydrocracked oil as a solvent},\n type = {article},\n year = {2020},\n keywords = {CoMo/Hβ,Hydrocracking,Hydrodeoxygenation,Lignin pyrolysis oil,Viscosity},\n volume = {213},\n month = {6},\n publisher = {Elsevier Ltd},\n day = {1},\n id = {bbf02c9a-94ec-3074-86e5-8490c04f6301},\n created = {2020-05-07T10:53:07.310Z},\n file_attached = {true},\n profile_id = {e2d2f261-b93b-3381-802e-ec4f45d345ec},\n last_modified = {2020-05-07T10:53:10.194Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {false},\n hidden = {false},\n private_publication = {false},\n abstract = {The development of solvent-free lignin pyrolysis processes is highly desirable, because these processes would allow the depolymerized product to be used directly as a renewable energy source and chemical feedstock, without removal of solvnets. However, this product is typically highly viscous and cannot be used in continuous-flow reaction systems. In this study, lignin pyrolysis oil was prepared from Kraft lignin using bench-scale fixed-bed batch pyrolysis and then hydrocracked to produce less-viscous liquid products. Oligomers were degraded into smaller molecules via reactions involving hydrogen (hydrocracking) using CoMo/Hβ and CoMo/Al2O3 as catalysts. A low viscosity of 21 cP, a liquid yield of 76.6%, and a low coke yield of 1.6% were successfully attained using a reaction temperature of 400 °C, a reaction time of 60 min, and the CoMo/Hβ catalyst. Thus, these conditions were selected to achieve the highest liquid yield with sufficient fluidity, although the lowest viscosity of 3.2 cP was achieved after 240 min. When 30 wt% of the resulting hydrocracked oil was used, it dissolved sticky raw lignin pyrolysis oil, significantly reducing its viscosity from 751 cP to 111 cP, which is sufficient to ensure flow in a typical petroleum pipeline. 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