Hydrothermal flowthrough pretreatment of biomass and pyrolysis characteristics of residual solid

LIU Tianlong; LI Qi; LI Zhonghong; YANG Peiyan; PANG Xinbo; HUANG Xin; ZHAO Xiaoyan; Cao Jingpei

doi:10.19906/j.cnki.JFCT.2023082

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LIU Tianlong, LI Qi, LI Zhonghong, YANG Peiyan, PANG Xinbo, HUANG Xin, ZHAO Xiaoyan, Cao Jingpei. Hydrothermal flowthrough pretreatment of biomass and pyrolysis characteristics of residual solid[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2023082

Citation:

LIU Tianlong, LI Qi, LI Zhonghong, YANG Peiyan, PANG Xinbo, HUANG Xin, ZHAO Xiaoyan, Cao Jingpei. Hydrothermal flowthrough pretreatment of biomass and pyrolysis characteristics of residual solid[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2023082

Citation:

LIU Tianlong, LI Qi, LI Zhonghong, YANG Peiyan, PANG Xinbo, HUANG Xin, ZHAO Xiaoyan, Cao Jingpei. Hydrothermal flowthrough pretreatment of biomass and pyrolysis characteristics of residual solid[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2023082

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Hydrothermal flowthrough pretreatment of biomass and pyrolysis characteristics of residual solid

doi: 10.19906/j.cnki.JFCT.2023082

LIU Tianlong^{1
,
,},
LI Qi^1
,,
LI Zhonghong^1
,,
YANG Peiyan^1
,,
PANG Xinbo¹,
HUANG Xin^2
,,
ZHAO Xiaoyan^1
,,
Cao Jingpei^{1
,
,}

1.
Jiangsu Province Engineering Research Center of Fine Utilization of Carbon Resources, China University of Mining & Technology, Xuzhou 221116, China
2.
Key Laboratory of Low-grade Energy Utilization Technologies & Systems, Chongqing University, Chongqing 400044, China

Funds: The project was supported by the National Natural Science Foundation of China (22108294), the China Postdoctoral Science Foundation (2021M693412), the Priority Academic Program Development of Jiangsu Higher Education Institutions and Shccig-Qinling Program.

Received Date: 2023-12-04
Accepted Date: 2023-12-13
Rev Recd Date: 2023-12-13

Available Online: 2024-01-18

Abstract

Abstract

The sophisticated multi-components and densed cross-link chemical structures of lignocellulosic biomass are important bottlenecks restricting its value-added utilization. The pre-fractionation of lignocellulose components is of great significance for the fractional conversion of biomass. The present study subjected rice husk (RH) to hydrothermal treatment in a flowthrough mode and investigated the effects of hydrothermal temperature and water flowrate on the decomposition rate of RH, chemical components of residual solids and their pyrolysis characteristics. It is shown that the decomposition of RH under hydrothermal conditions conformed well to the unreacted shrinking core model with phase boundary reactions rate-controlling. The pretreatment at 180 ℃ removed 95% alkali and alkaline-earth metallic species, 92% hemicellulose and 59% lignin from RH and selectively retained most of the cellulose components. As a result of the pretreatment, the relative content of anhydrosugar (mainly levoglucosan) from pyrolysis of RH at a curie-point temperature of 445 ℃ was increased from 9.9% up to 48.2%.
- rice husk,
- hydrothermal pretreatment,
- anhydrosugar,
- pyrolysis

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References(31)

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