Catalytic conversion of Kraft lignin into platform chemicals in supercritical ethanol over a Mo(OCH2CH3)x/NaCl catalyst

Qingfeng Liu, Yushuai Sang, Yunfei Bai, Kai Wu, Zewei Ma, Mengmeng Chen, Yiming Ma, Hong Chen*, Yongdan Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A Mo(OCH2CH3)x/NaCl catalyst showed high efficiency in supercritical ethanol without adding H2 in the conversion of Kraft lignin to chemicals, including C6 alcohols, C8-C10 esters, benzyl alcohols and arenes. Control experiments were done with MoCl5, NaOC2H5 and the physical mixture of them. The Mo(OCH2CH3)x/NaCl catalyst exhibited superior activity among the samples examined. The overall yield increased as the reaction temperature increased from 260 to 300 °C. The yield of aromatic compounds achieved 303mg/g lignin over the Mo(OCH2CH3)x/NaCl catalyst at 300oC for 6h. MoCl5 and NaOC2H5 forms Mo(OCH2CH3)x in the catalyst preparation, which behaves as the active species in Kraft lignin conversion. The primary aromatics formed from the catalytic lignin depolymerization steps may undergo secondary reactions to form the final products.
Original languageEnglish
JournalCatalysis Today
Early online date13 May 2022
DOIs
Publication statusE-pub ahead of print - 13 May 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Kraft Lignin
  • Mo-based catalyst
  • Aromatics
  • Biomass
  • Catalytic solvolysis

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