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Supercritical extraction of biomass as an effective pretreatment step for the char yield control in pyrolysis

Trubetskaya, Anna and Budarin, Vitaliy and Arshadi, Mehrdad and Magalhaes, Duarte and Kazanc, Feyza and Hunt, Andrew John (2021). Supercritical extraction of biomass as an effective pretreatment step for the char yield control in pyrolysis. Renewable Energy. 170 , 107-117
[Research article]

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Abstract

This work demonstrates that the coupling of supercritical carbon dioxide extraction with pyrolysis is an effective method for the removal of extractives from forestry residues and generation of solid char with different properties from the remaining solid wood fractions. Extraction of the needles and stumps shows greater yields of resin acids, terpenes, steroids and other derivatives than that of pinewood bark, cones and branches. The char yields of both non-treated and scCO(2) extracted wood fractions varied from approximately 17.5 to 38.5 wt. % on dry basis at fast heating rates. The catalytic effect of extractives is significant on the yields and morphology of solid chars in fast pyrolysis and less pronounced at slow heating rates. These results are promising as they show that both the composition and location of extractives inclusions in the interior of wood particle can affect the morphology of char samples. Moreover, the impact of alkali metals on the wood devolatilization appears to be less compared to the lignocellulosic composition in slow pyrolysis. These results demonstrate that supercritical carbon dioxide extraction can be integrated in biorefinery as a pretreatment step to control the properties of pyrolysis products by varying the heating rate. (C) 2021 The Author(s). Published by Elsevier Ltd.

Authors/Creators:Trubetskaya, Anna and Budarin, Vitaliy and Arshadi, Mehrdad and Magalhaes, Duarte and Kazanc, Feyza and Hunt, Andrew John
Title:Supercritical extraction of biomass as an effective pretreatment step for the char yield control in pyrolysis
Series Name/Journal:Renewable Energy
Year of publishing :2021
Volume:170
Page range:107-117
Number of Pages:11
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0960-1481
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Renewable Bioenergy Research
Keywords:Supercritical extraction, Char yield, Scots pine, Heating rate, Fluidisation
URN:NBN:urn:nbn:se:slu:epsilon-p-111388
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111388
Additional ID:
Type of IDID
DOI10.1016/j.renene.2021.01.116
Web of Science (WoS)000632047200009
ID Code:23246
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:12 Apr 2021 10:03
Metadata Last Modified:12 Apr 2021 10:11

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