ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Chemical Upgrading of Biomass
Atul Sharma Kazuya UeboTakahiro Shishido
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2023 Volume 63 Issue 9 Pages 1519-1525

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Abstract

In this study, a solvent based chemical upgrading process for coal was applied for chemical upgrading of biomass. Biomass was solvent treated at 320, 350, 380, 400, and 420°C, for 2 h with 1-methylnapthlene (1-MN) solvent. Upgraded biomass samples were obtained by removing 1-MN from the solvent treated samples using hexane washing approach. A part of 1-MN soluble fraction was also soluble in the hexane. n-Hexane soluble fraction obtained after the n-Hexane and the 1-MN recovery (solute) was combined to obtain upgraded biomass. H/C and O/C of the upgraded biomass (UB) samples were close to the values in the region of caking coals utilized in coke-making process suggesting chemical upgrading of the biomass. Solute fraction from the biomass was higher in comparison to that from the coal. The GCMS analysis showed the n-Hexane soluble may have compounds with boiling points lower than 1-MN. The carbon balance was lower than 100% may be because of the loss of the n-Hexane soluble biomass compounds with boiling points lower than 1-MN during the 1-MN separation process. Effect of addition of upgraded biomass to coal was investigated. Fracture strength and bulk density showed improvement due to the addition of upgraded biomass. Change in 1-MN solvent characteristics was investigated by recycling the used solvent. H/C, O/C and solute yields were nearly same for each recycle run.

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© 2023 The Iron and Steel Institute of Japan.

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https://creativecommons.org/licenses/by-nc-nd/4.0/
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