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