Effect of SC-CO2 pretreatment in increasing rice straw biomass conversion

文献类型: 外文期刊

第一作者: Gao, Miao

作者: Gao, Miao;Xu, Feng;Ji, Xiaoci;Chen, Sanfeng;Gao, Miao;Xu, Feng;Ji, Xiaoci;Chen, Sanfeng;Gao, Miao;Li, Shurong;Zhang, Dequan

作者机构:

关键词: glucose: 58367-01-4;beta-glucosidase: 9001-22-3;EC 3.2.1.21;cellulase: 9012-54-8;EC 3.2.1.4;cellulose: 9004-34-6;lignocellulose: 11132-73-3;enzymatic hydrolysis;liquid-solid ratio;supermolecular structure;rice straw biomass conversion;anomalous porosity

期刊名称:BIOSYSTEMS ENGINEERING ( 影响因子:4.123; 五年影响因子:4.508 )

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年卷期:

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收录情况: SCI

摘要: Rice straw, pretreated with supercritical carbon dioxide (SC-CO2) at 10-30 MPa and 40-110 degrees C for 15-45 mm at a 1:1 g/g liquid: solid ratio, was analysed for glucose yield from enzymatic hydrolysis, main chemical composition, and supermolecular structure. Rice straw that was pretreated with SC-CO2 at 30 MPa and 110 degrees C for 30 min had a final glucose yield of 32.4 +/- 0.5%, compared with 27.7 +/- 0.5% for unpretreated straw, after enzymatic hydrolysis with a mixture of cellulose and beta-glucosidase. Unpretreated and pretreated rice straw differed in chemical composition, with SC-CO2 pretreatment removing some non-lignocellulose material. Scanning electron microscopy showed that pretreated rice straw had extensive anomalous porosity and lamellar structures. Also, SC-CO2 pretreatment rendered fibres relatively fluffy and soft, which enhanced cellulase enzymatic hydrolysis. (c) 2010 IAgrE

分类号: S18

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