Synthesis-Controlled α- And β-Molybdenum Carbide for Base-Promoted Transfer Hydrogenation of Lignin to Aromatic Monomers in Ethanol

Research output: Contribution to journalArticle

Researchers

  • Kejing Wu
  • Chunyan Yang
  • Yingming Zhu
  • Junbo Wang
  • Xueting Wang
  • Changjun Liu
  • Yingying Liu
  • Houfang Lu
  • Bin Liang
  • Yongdan Li

Research units

  • Sichuan University
  • Tianjin University

Abstract

Molybdenum carbide catalysts over activated carbon with different crystal phases were synthesized under controllable carburization atmospheres and temperatures for transfer hydrogenation of Kraft lignin in ethanol to aromatic monomers. Single α-MoC1-x and crystal transformation of α-MoC1-x to β-Mo2C are observed under a CH4/H2 mixture and H2 carburization atmospheres, respectively. The mixed crystal phases of α-MoC1-x and β-Mo2C with different crystallinities under a N2 carburization atmosphere exhibit higher activity with a maximum aromatic yield of 0.5163 g/g Kraft lignin when carburized at 700 °C. The dehydrogenation reaction and Kraft lignin hydrogenation are proposed to explain the synergistic effect of β-Mo2C, base, and α-MoC1-x for the base-promoted transfer hydrogenation process in ethanol, which is confirmed by in situ Fourier transform infrared analysis. This highly efficient process is suitable for the conversion of different lignin feedstock.

Details

Original languageEnglish
Pages (from-to)20270-20281
Number of pages12
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number44
Publication statusPublished - 6 Nov 2019
MoE publication typeA1 Journal article-refereed

ID: 39232778