Skip to main content
Research article - Peer-reviewed, 2020

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

Jogi, Ramakrishna; Maki-Arvela, Paivi; Virtanen, Pasi; Kumar, Narendra; Hemming, Jarl; Russo, Vincenzo; Samikannu, Ajaikumar; Lestander, Torbjorn A.; Mikkola, Jyri-Pekka


The liquefaction of biomass in ethanol, at the critical point, has high potential due to low temperature and pressure (243 degrees C, 63 bar) when compared with water (374 degrees 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. (C) 2020 Energy Institute. Published by Elsevier Ltd. All rights reserved.


Hydrothermal liquefaction (HTL); Birch; Supercritical ethanol; Hydrogen atmosphere; Iron supported zeolite; Isoeugenol; Thermodynamic analysis

Published in

Journal of the Energy Institute
2020, volume: 93, number: 5, pages: 2055-2062

Authors' information

Jogi, Ramakrishna
Abo Akademi University
Maki-Arvela, Paivi
Abo Akademi University
Virtanen, Pasi
Abo Akademi University
Kumar, Narendra
Abo Akademi University
Hemming, Jarl
Abo Akademi University
Russo, Vincenzo
University of Naples Federico II
Samikannu, Ajaikumar
Umea University
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
Mikkola, Jyri-Pekka
Umea University

UKÄ Subject classification


Publication Identifiers


URI (permanent link to this page)