Understanding the formation of phenolic monomers during fractionation of birch wood under supercritical ethanol over iron based catalysts

Ramakrishna Jogi*, Päivi Mäki-Arvela, Pasi Virtanen, Narendra Kumar, Jarl Hemming, Vincenzo Russo, Ajaikumar Samikannu, Torbjörn A. Lestander, Jyri-Pekka Mikkola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The liquefaction of biomass in ethanol, at the critical point, has high potential due to low temperature and pressure (243 °C, 63 bar) when compared with water (374 °C, 220 bar). The current study deals with the fractionation of birch wood powder which was liquefied under supercritical ethanol over acidic or non-acidic catalysts, 5 wt % Fe-Beta-H-150 and 5 wt % Fe–SiO2, respectively. Based on the results, the reaction mechanism for the formation of lignin degradation products was proposed. The main phenolic product was isoeugenol over 5 wt % Fe-Beta-H-150 while intermediate products, i.e. such as coniferyl, and sinapyl alcohol, 4-propenyl syringol, syringaresinol, as well as syringyldehyde reacted rapidly further. The thermodynamic analysis was performed by Joback approach and using Gibbs-Helmholtz equation supporting the obtained results.

Original languageEnglish
Pages (from-to)2055-2062
JournalJournal of the Energy Institute
Volume93
Issue number5
DOIs
Publication statusPublished - Oct 2020
MoE publication typeA1 Journal article-refereed

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