Assessment of Cellulosic Biomass Saccharification by Molten Bronsted Acidic 1-Ethyl-3-Methylimidazolium Hydrogen Sulphate ([EMIM][HSO4]) Via Kinetic Studies

Ang T.N., Chan C.-H., Ngoh G.C., Lee K.M., Yoon L.W. & Chua A.S.M. (2016). Assessment of cellulosic biomass saccharification by molten Bronsted acidic 1-ethyl-3-methylimidazolium hydrogen sulphate ([EMIM][HSO4]) via kinetic studies. BioResources. 11(1), 1349-1358.

10 Pages Posted: 23 Feb 2017

See all articles by Teck Nam

Teck Nam

The University of Auckland

Chung-Hung Chan

affiliation not provided to SSRN

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Kiat Moon Lee

University of Malaya (UM)

Li Wan Yoon

University of Malaya (UM)

Adeline Seak May Chua

University of Malaya (UM)

Date Written: February 22, 2016

Abstract

Ionic liquids have been employed to deconstruct and fractionate lignocellulosic biomasses because of their capacity to dissolve cellulose. However, there is limited literature reporting the use of ionic liquids in biomass saccharification, which mostly involves the addition of acid or water that conceals the true action of ionic liquid in saccharification. This article assesses the performance of molten Brӧnsted acidic 1-ethyl-3-methylimidazolium hydrogen sulphate ([EMIM][HSO4]) in saccharifying three agricultural biomasses, namely sago hampas, sugarcane bagasse, and rice husk, via saccharification kinetics. At 100 °C, [EMIM][HSO4] saccharification of the biomasses achieved equilibrium reducing sugar yields at various durations (sago hampas, 3 h; sugarcane bagasse, 1 h; rice husk, 5 h). The kinetic rate constant was obtained from model fitting, indicated that [EMIM][HSO4] showed a preference for saccharifying less recalcitrant sugarcane bagasse (37.9%) than sago hampas (7.0%) and rice husk (1.1%). Compared to H2SO4 saccharification, reducing sugar yields of [EMIM][HSO4] were consistently lower. The difference in yields might be attributed to the hydrous/anhydrous state of reaction and limited availability of component ions of the ionic liquid for dissolution and saccharification. This study demonstrates the feasible technical aspects of applying [EMIM][HSO4] to saccharify agricultural biomasses, which may lead to economic feasibility, recyclability, and cost effectiveness of ionic liquids in saccharification.

Keywords: Ionic liquid; Simultaneous dissolution and saccharification; Kinetic modeling; Sago hampas; Sugarcane bagasse; Rice husk

JEL Classification: C61, A00, B00, C90, I20, Q20, Q00, Q16, Q32

Suggested Citation

Ang, Teck Nam and Chan, Chung-Hung and Ngoh, Gek-Cheng and Lee, Kiat Moon and Yoon, Li Wan and Chua, Adeline Seak May, Assessment of Cellulosic Biomass Saccharification by Molten Bronsted Acidic 1-Ethyl-3-Methylimidazolium Hydrogen Sulphate ([EMIM][HSO4]) Via Kinetic Studies (February 22, 2016). Ang T.N., Chan C.-H., Ngoh G.C., Lee K.M., Yoon L.W. & Chua A.S.M. (2016). Assessment of cellulosic biomass saccharification by molten Bronsted acidic 1-ethyl-3-methylimidazolium hydrogen sulphate ([EMIM][HSO4]) via kinetic studies. BioResources. 11(1), 1349-1358.. Available at SSRN: https://ssrn.com/abstract=2921726

Teck Nam Ang (Contact Author)

The University of Auckland ( email )

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

Chung-Hung Chan

affiliation not provided to SSRN

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Jalan Lembah Pantai
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

Li Wan Yoon

University of Malaya (UM) ( email )

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

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