Selective demethoxylation of guaiacol to alkylphenols in supercritical methanol over a HT-MoS2 catalyst

Kai Wu, Saravanan Kasipandi, Fei Yan, Yushuai Sang, Zewei Ma, Mengmeng Chen, Hong Chen, Yongdan Li

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The high value-added products such as alkyl substituted phenols (A-Ps) are very important from lignin-derived feedstocks. Herein, the selective conversion of guaiacol, an important chemical of lignin-derived bio-oil, to A-Ps over hydrothermally synthesized bulk MoS2 (HT-MoS2) was examined under supercritical methanol conditions without any gaseous hydrogen input. HRTEM confirms the formation of MoS2 with the nanosheet-like structure and XPS analysis exhibited the presence of Mo5+ and S22- species which are likely the active species for demethoxylation (DMO) and alkylation of guaiacol. The possible reaction pathways along with their plausible intermediates of guaiacol conversion are proposed. The HT-MoS2 catalyst can be reused up to 4 catalytic runs without loss of its catalytic activity.
Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusE-pub ahead of print - 13 Nov 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • alkylphenols
  • biomass
  • guaiacol
  • molybdenum oxysulfide
  • selective demethoxylation

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