Catalytic hydrothermal pretreatment of corncob into xylose and furfural via solid acid catalyst.

Bioresour Technol. 2014 Apr;158:313-20.

Li H1, Deng A1, Ren J2, Liu C3, Lu Q1, Zhong L1, Peng F4, Sun R5.

 

1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China and

2State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address: [email protected] and

3School of Computer Science and Engineering, South China University of Technology, Guangzhou 510006, China and

4Institute of Biomass Chemistry and Utilization, Beijing Forestry University, Beijing 100083, China and

5State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; Institute of Biomass Chemistry and Utilization, Beijing Forestry University, Beijing 100083, China. Electronic address: [email protected]

 

Abstract

 

Selectively catalytic hydrothermal pretreatment of corncob into xylose and furfural has been developed in this work using solid acid catalyst (SO4(2-)/TiO2-ZrO2/La(3+)). The effects of corncob-to-water ratio, reaction temperature and residence time on the performance of catalytic hydrothermal pretreatment were investigated. Results showed that the solid residues contained mainly lignin and cellulose, which was indicative of the efficient removal of hemicelluloses from corncob by hydrothermal method. The prepared catalyst with high thermal stability and strong acid sites originated from the acid functional groups was confirmed to contribute to the hydrolysis of polysaccharides into monosaccharides followed by dehydration into furfural. Highest furfural yield (6.18 g/100g) could be obtained at 180°C for 120 min with 6.80 g/100g xylose yield when the corncob/water ratio of was 10:100. Therefore, selectively catalytic hydrothermal pretreatment of lignocellulosic biomass into important platform chemicals by solid acids is considered to be a potential treatment for biodiesel and chemical production.

Copyright © 2014 Elsevier Ltd. All rights reserved.

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