Simultaneous catalytic esterification of carboxylic acids and acetalisation of aldehydes in a fast pyrolysis bio-oil from mallee biomass

Xiang Li, Richard Gunawan, C. Lievens, Yi Wang, Daniel Mourant, Shan Wang, Hongwei Wu, Manuel Garcia-Perez, Chun Zhu Li*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

78 Citations (Scopus)

Abstract

This paper reports the simultaneous catalytic esterification and acetalisation of a bio-oil with methanol using a commercial Amberlyst-70 catalyst at temperatures between 70 and 170 °C. The bio-oil was prepared from the pyrolysis of mallee woody biomass in a fluidised-bed pyrolysis reactor under the fast heating rate conditions. Our results show that the conversion of light organic acids and aldehydes to esters and acetals rises significantly with increasing temperature, reaction time and catalysts loading. However, some acetals (e.g. dimethoxymethane) could decompose at higher operating temperatures (>110 °C) and catalyst loadings (>6 wt.%). The medium and heavy fractions of bio-oil also reacted with methanol to result in increases in their volatility (or decreases in boiling points) when their reactive O-containing functional groups were stabilised. The acid-catalysed reactions between bio-oil and methanol also decreased the coking propensity of the bio-oil reaction products.

Original languageEnglish
Pages (from-to)2530-2537
Number of pages8
JournalFuel
Volume90
Issue number7
Early online date30 Mar 2011
DOIs
Publication statusPublished - 1 Jul 2011
Externally publishedYes

Keywords

  • Acetalisation
  • Bio-oil
  • Esterification
  • Upgrading
  • ITC-ISI-JOURNAL-ARTICLE

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