CaO catalyst for multi-route conversion of oakwood biomass to value-added chemicals and fuel precursors in fast pyrolysis

Jyoti Gupta, Konstantinos Papadikis, Elena Yu Konysheva, Yi Lin, Ivan V. Kozhevnikov, Jingjing Li

Research output: Journal PublicationArticlepeer-review

29 Citations (Scopus)

Abstract

The impact of CaO on oakwood pyrolysis was explored by the Py-GC/MS at 500 °C. Ca(OH)2 presents on the CaO surface, indicating its partial hydration (noted as CaOOH). CaOOH promoted the ketonisation of carboxylic acids to aliphatic ketones, furfural to cyclopentanone/2-cyclopentenone, facilitated the elimination of the methoxy-phenolic compounds. The catalyst loading did not show any significant effect on the formation of acetone, while a noticeable reduction in the phenolics was revealed. Increasing catalyst loading almost eliminated CO2, acids, furans, aldehydes, ether groups, whilst the fractions of alcohols, esters, sugars, and alkoxybenzene decreased noticeably. The use of partially hydrated CaOOH in the CFP can create conditions where by-products generated during the ketonisation and phenolics upgrading reactions (CO2, H2O, CO) interact through the adsorption enhance water-gas-shift reaction and through coking reactions with formation of H2 used for hydrogenation during multistep conversion of furfural to cyclopentanone in a vapour phase.

Original languageEnglish
Article number119858
JournalApplied Catalysis B: Environmental
Volume285
DOIs
Publication statusPublished - 15 May 2021

Keywords

  • Catalytic fast pyrolysis
  • Furfural transformation
  • Ketonisation
  • Oakwood biomass conversion
  • Partially hydrated CaO

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science (all)
  • Process Chemistry and Technology

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