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Effects of lignin on the ionic-liquid assisted catalytic hydrolysis of cellulose: chemical inhibition by lignin

Authors
Lee, Hwa-JeongSanyoto, BernardiChoi, Jae-WookHa, Jeong-MyeongSuh, Dong JinLee, Kwan-Young
Issue Date
10월-2013
Publisher
SPRINGER
Keywords
Lignin; Hydrolysis; Catalysis; Ether; Ester; Hydroxyl; Carboxyl
Citation
CELLULOSE, v.20, no.5, pp.2349 - 2358
Indexed
SCIE
SCOPUS
Journal Title
CELLULOSE
Volume
20
Number
5
Start Page
2349
End Page
2358
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101928
DOI
10.1007/s10570-013-9989-0
ISSN
0969-0239
Abstract
The production of cellulose-derived biofuels and biochemicals, such as bioalcohols and bioplastics, from lignocellulose requires the isolation of cellulose by lignin removal or delignification processes. While the remaining lignin and its phenolic fragments have been reported to inhibit the biological conversion of cellulose, we observed that the catalytic hydrolysis of cellulose also can be inhibited most likely because of an associative interaction between cellulose and lignin. The associative interaction between cellulose and the functional groups of lignin was proven by gel-permeation-chromatography measurement of regenerated mixtures of lignin and cellulose which simulate the lignocellulose-derived cellulose containing lignin as an impurity. Chemical bonds between cellulose and lignin were hypothesized using lignin model compounds containing known functionalities such as hydroxyl, methoxy, phenyl, allyl, and carboxyl groups in order to explain the effects of lignin on the hydrolysis of cellulose. The yield of glucose from cellulose dropped when carboxylic and hydroxyl groups were present possibly because of the formation of ether and ester bonds between the lignin and cellulose. These observations may help develop the chemical processes and therefore convert the inedible biomass resource of lignocellulose-based cellulose containing lignin and its derivatives to the valuable fuels and chemicals.
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Lee, Kwan Young
공과대학 (화공생명공학과)
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