Microwave-assisted co-pyrolysis of pretreated lignin and soapstock for upgrading liquid oil: Effect of pretreatment parameters on pyrolysis behavior

Dengle Duan, Roger Ruan, Hanwu Lei, Yuhuan Liu, Yunpu Wang, Yayun Zhang, Yunfeng Zhao, Leilei Dai, Qiuhao Wu, Shumei Zhang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The co-pyrolysis of pretreated lignin and soapstock was carried out to upgrade vapors under microwave irradiation. Results showed that the yield of 29.92–42.21 wt% of upgraded liquid oil was achieved under varied pretreatment conditions. Char yield decreased from 32.44 wt% for untreated control to 24.35 wt% for the 150 °C pretreated samples. The increased temperature, irradiation time and acid concentration were conducive to decrease the relative contents of phenols and oxygenates in liquid oils. The main components of the liquid oil were gasoline fraction (mono-aromatics and C5–C12 aliphatics), which ranged from 57.38 to 71.98% under various pretreatment conditions. Meanwhile, the diesel fraction (C12+ aliphatics) ranged from 13.16 to 22.62% from co-pyrolysis of pretreated lignin and soapstock, comparing with 10.18% of C12+ aliphatics from co-pyrolysis of non-pretreated lignin and soapstock. A possible mechanism was proposed for co-pyrolysis of pretreated lignin and soapstock for upgraded liquid oils.

Original languageEnglish (US)
Pages (from-to)98-104
Number of pages7
JournalBioresource Technology
Volume258
DOIs
StatePublished - Jun 2018

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support from The Agriculture and Food Research Initiative of National Institute of Food and Agriculture, United States Department of Agriculture ( 2016-67021-24533 ), The National Natural Science Foundation of China ( 21766019 ), The Key Research and Development Program of Jiangxi Province ( 20171BBF60023 ), International Cooperation Project of MOST. P. R. China ( 2015DFA60170 ), China Scholarship Council (CSC. No. 201706820027 ), Science and Technology Research Project of Jiangxi Province Education Department ( GJJ150213 ), Innovation and Entrepreneurship Development Fund of “Thousand talents program” Talent ( 1001-02102082 ), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development ( Y707sb1001 ).

Funding Information:
We gratefully acknowledge the financial support from The Agriculture and Food Research Initiative of National Institute of Food and Agriculture, United States Department of Agriculture (2016-67021-24533), The National Natural Science Foundation of China (21766019), The Key Research and Development Program of Jiangxi Province (20171BBF60023), International Cooperation Project of MOST. P. R. China (2015DFA60170), China Scholarship Council (CSC. No. 201706820027), Science and Technology Research Project of Jiangxi Province Education Department (GJJ150213), Innovation and Entrepreneurship Development Fund of “Thousand talents program” Talent (1001-02102082), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development (Y707sb1001).

Keywords

  • Acid pretreatment
  • Co-pyrolysis
  • Lignin
  • Microwave
  • Soapstock

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