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Improvement of Biomass Properties by Pretreatment With Ionic Liquids for Bioconversion Process

Improvement of Biomass Properties by Pretreatment With Ionic Liquids for Bioconversion Process

Piyarat Weerachanchai, Susanna Su Jan Leong, Matthew Wook Chang, Chi Bun Ching, Jong-Min Lee

Bioresour Technol. 2012 May;111:453-9.

PMID: 22366610

Abstract:

Cassava pulp residue and rice straw were used as a precursor for pretreatment with ionic liquids to study the effects of pretreatment conditions on product yield and properties. Cassava pulp residue is a potential biomass in the bioconversion process due to it requiring mild pretreatment conditions while providing a high sugar conversion. The maximum sugar conversion and lignin extraction are attained from pretreatment of biomasses with particle size of <38 μm and ionic liquid of 1-Ethyl-3-methylimidazolium acetate at 120°C for 24h. The effectiveness of ionic liquid for biomass pretreatment process follows the sequence: 1-Ethyl-3-methylimidazolium acetate>1-Ethyl-3-methylimidazolium diethyl phosphate>1,3-Dimethylimidazolium methyl sulfate. The increase of pretreatment temperature from 25 to 120°C and decrease of biomass particle size renders higher sugar conversion, lignin extraction and lower crystallinity index. However, pretreatment at temperatures higher than 120°C shows a sharp decline of regenerated biomass yield, sugar conversion and lignin extraction and giving higher crystallinity index at pretreatment temperature of 180°C.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP516474014	1-Ethyl-3-methylimidazolium methyl sulfate		516474-01-4	Price

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