Journal
CARBOHYDRATE POLYMERS
Volume 149, Issue -, Pages 369-381Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.129
Keywords
Cellulose deformation; Enzymatic digestibility; Ionic liquid; Pretreatment; Mechanism
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Funding
- Department of Biotechnology, Government of India
- DBT-IOC Centre for Advanced Bio Energy Research, Indian Oil Corporation Ltd., Research & Development Centre, Faridabad (India) [BT/PB/08/03/2007]
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In this study, five ionic liquids (ILs) have been explored for biomass pretreatment for the production of fermentable sugar. We also investigated the driving factors responsible for improved enzymatic digestibility of various ILs treated biomass along with postulating the plausible mechanism thereof. Post pretreatment, mainly two factors impacted the enzymatic digestibility (i) structural deformation (cellulose I to II) along with xylan/lignin removal and (ii) properties of ILs; wherein, K-T parameters, viscosity and surface tension had a direct influence on pretreatment. A systematic investigation of these parameters and their impact on enzymatic digestibility is drawn. [C(2)mim][OAc] with beta-value 1.32 resulted 97.7% of glucose yield using 10 FPU/g of biomass. A closer insight into the cellulose structural transformation has prompted a plausible mechanism explaining the better digestibility. The impact of these parameters on the digestibility can pave the way to customize the process to make biomass vulnerable to enzymatic attack. (C) 2016 Elsevier Ltd. All rights reserved.
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