Screening microwave susceptors for microwave-assisted pyrolysis of lignin: Comparison of product yield and chemical profile

Liangliang Fan, Hanwu Song, Qian Lu, Lijian Leng, Kun Li, Yuhuan Liu, Yunpu Wang, Paul Chen, Roger Ruan, Wenguang Zhou

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Lignin was pyrolyzed with microwave heating in the presence of different microwave susceptors including silicon carbide (SiC), activated carbon (AC), and biochar (BC). The heating profiles of microwave heating with different susceptors were characterized. With SiC as the susceptor, three distinct heating stages were observed, which were believed to correspond to the three main stages of lignin decomposition. The effects of temperature, susceptor loading weight, and susceptor type on product yield and composition were investigated. Higher pyrolysis temperatures favored char reduction, demethoxylation and alkylation of phenols, and H2 formation. Higher SiC loading weight promoted the formation of alkyl phenols and syngas (CO and H2). Compared with SiC, both AC and BC enhanced the production of syngas, accounting for 74.5% and 70.1% in volume percentage, respectively. AC contributed to the highest bio-oil and gas production while BC showed highest selectivity to phenol and alkyl phenols, up to 58.2% and 37.7%, respectively.

Original languageEnglish (US)
Article number104623
JournalJournal of Analytical and Applied Pyrolysis
Volume142
DOIs
StatePublished - Jan 1 2019
Externally publishedYes

Bibliographical note

Funding Information:
The present work is supported in part by National Natural Science Foundation of China (No. 21466022 ; No. 21766019 ), Key Research and Development Program of Jiangxi Province ( 20161BBF60057 ; 20171BBF60023 ; GCXZ2014-124 ), the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources (LCCMR), Xcel Energy , and University of Minnesota Center for Biorefining .

Funding Information:
The present work is supported in part by National Natural Science Foundation of China (No. 21466022; No. 21766019), Key Research and Development Program of Jiangxi Province (20161BBF60057; 20171BBF60023; GCXZ2014-124), the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources (LCCMR), Xcel Energy, and University of Minnesota Center for Biorefining.

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

  • Activated carbon
  • Biochar
  • Lignin
  • Phenols
  • Silicon carbide
  • Syngas

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