Efficiency of Ionic Liquid in the Dissolution of Rice Husk

BioResources, 6(4), 4790-4800.

11 Pages Posted: 19 Jan 2015

See all articles by Teck Nam

Teck Nam

The University of Auckland

Li Wan Yoon

University of Malaya (UM)

Kiat Moon Lee

University of Malaya (UM)

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Adeline Seak May Chua

University of Malaya (UM)

Min Gyu Lee

Pukyong National University

Date Written: 2011

Abstract

Ionic liquids that dissolve cellulose provide an option to pretreat lignocellulosic biomass. In this study, potential application of three ionic liquids in pretreating rice husk and their abilities in dissolving rice husk cellulose were investigated. The ionic liquids applied were 1-butyl-3-methylimidazolium chloride ([BMIM]Cl), 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc), and 1-ethyl-3-methylimidazolium diethyl phosphate ([EMIM]DEP). Dissolution of rice husk was conducted by heating 1.5% (w/v) rice husk-ionic liquid mixture at 100oC for 20 hours. The dissolved cellulose was subsequently regenerated with deionised water. All the ionic liquids were able to dissolve rice husk cellulose to varying extents, with the highest dissolution (36.7%) given by [EMIM]OAc followed by [BMIM]Cl (31.3%) and [EMIM]DEP (16.0%) at the 10th hour of heating. All the regenerated cellulose were found to be more amorphous as compared to the untreated rice husk. The energy study showed that both [EMIM]OAc and [BMIM]Cl had lower energy requirement compared to [EMIM]DEP. The results of energy requirement complemented the findings of dissolution ability of the ionic liquid. Both [EMIM]OAc and [BMIM]Cl are potential ionic liquids to be used in the pretreatment of rice husk, as they dissolved rice husk equally well.

Keywords: Ionic liquid; Dissolution; Regenerated cellulose; Rice husk; FT-IR; Energy requirement

JEL Classification: C09, C93, N55, O13, Q00, Q10, Q16, Q20, Q23, Q40, Q42

Suggested Citation

Ang, Teck Nam and Yoon, Li Wan and Lee, Kiat Moon and Ngoh, Gek-Cheng and Chua, Adeline Seak May and Lee, Min Gyu, Efficiency of Ionic Liquid in the Dissolution of Rice Husk (2011). BioResources, 6(4), 4790-4800.. Available at SSRN: https://ssrn.com/abstract=2550029

Teck Nam Ang (Contact Author)

The University of Auckland ( email )

Department of Chemical and Materials Engineering
Auckland, AK 1010
New Zealand

Li Wan Yoon

University of Malaya (UM) ( email )

Kuala Lumpur, Wilayah Persekutuan 50603
University of Malaya (UM)
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Kiat Moon Lee

University of Malaya (UM) ( email )

Kuala Lumpur, Wilayah Persekutuan 50603
University of Malaya (UM)
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Jalan Lembah Pantai
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Adeline Seak May Chua

University of Malaya (UM) ( email )

Kuala Lumpur, Wilayah Persekutuan 50603
University of Malaya (UM)
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Min Gyu Lee

Pukyong National University ( email )

599-1 Daeyeo-dong, Nam-Gu
Pusan 608-737
Korea, Republic of (South Korea)

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