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| Purify Cellulose of Corn Straw by Acid and Alkali Pretreatment and Research of Reducing Sugar by Enzymatic Hydrolysis |
| WU Chong-hui1, KOU Wei2, SHAO Li-jie2, ZHANG Huan2, CAO Yan-xin2, ZHANG Da-lei2 |
1. Shenyang Aerospace University, Institute of Energy & Environment, Shenyang 110136, China;
2. Liaoning Institute of Energy Resource, Yingkou 115003, China |
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Abstract In order to improve reducing sugar yield of corn straw, corn straw was pretreated by dilute acid and alkali. The finding by analysis showed that the content of cellulose was increased from 39.15% to 91.34%, and most of hemicellulose and lignin was eliminated, yet the mass loss of cellulose was only 2.01%. X-ray diffraction showed the crystalline degree of cellulose increased by 124.13%; Infrared spectrum analysis found that most of the structure of hemicellulose and lignin was destructed after corn straw was pretreated by acid and alkali; Scanning electron microscope pictures found that cracks and holes increased obviously on the surface of fiber bundle. Further cellulose enzymolysis experiment showed that the yield of reducing sugar of untreated corn straw was only 13.66%, while the yield of corn straw treated by acid and alkali can reach 65.17%,improved 377.09% compared with the materials untreated, while enzymolysis time could be reduced about 24h. The result showed that dilute acid and alkali pretreatment could obviously increase the conversion efficiency of corn straw cellulose.
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Received: 08 June 2013
Published: 25 November 2013
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