A4 Conference proceedings

Impact of lignin extraction pretreatment on hydrothermally carbonized spruce characteristics

Publication Details
Authors: Partridge Anna, Sermyagina Ekaterina, Vakkilainen Esa
Publication year: 2018
Language: English
Title of parent publication: Young Biomass Researchers Conference 2018
JUFO-Level of this publication: 0
Open Access: Not an Open Access publication


Upgrading biomass waste streams can improve economics in wood industries by adding value to the process side streams. Lignin extraction and hydrothermal carbonization (HTC) have been studied independently as routes for increasing the pro fitability of raw woodchips. This work considers the effect of lignin extraction on subsequent HTC thermochemical upgrading. Batch experiments were performed at 200-240 C and residence time 3 h with biomass to water ratio 8:1 for two feedstocks: raw spruce, and spruce after lignin extraction. The proximate analysis and higher heating value showed similar results for both feedstocks, while the energy yield was 9.7 percentage points better for the treated wood on average across the range temperatures. The energy densifi cation ratio and the mass yield were strongly correlated with reactor temperature, while the energy yield was not. Treated wood achieved slightly higher energy density with less mass loss for each reaction temperature studied.

Last updated on 2018-09-07 at 09:44