| 刘建乐 白昌军 严琳玲 贾庆麟 张 瑜 邵 光.割手密硫酸 解糖化的研究[J].广东农业科学,2015,42(2):82-88 |
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割手密硫酸 解糖化的研究 |
| Study on conditions of sugar manufacturing of Saccharum spontaneum L. by acid hydrolysis |
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| DOI： |
| 中文关键词: 割手密 酸水解 两段水解法 |
| 英文关键词: Saccharum spontaneum L. acid hydrolysis two-section acid hydrolysis |
| 基金项目: |
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| 摘要点击次数: 1391 |
| 全文下载次数: 664 |
| 中文摘要: |
| 割手密是生物质产量较高的纤维素类植物，作为能源植物受到国内外的普遍关注。利用纤维素类材料生产燃料乙醇的过程中，秸秆的水解糖化是关键步骤。 以割手密为试验材料进行单因素和正交试验研究浓硫酸和稀硫酸的浓度、试验时间、试验温度、液固比对割手密糖化处理的影响，筛选出浓硫酸和稀硫酸处理
的最佳条件，将两段硫酸处理的最佳反应条件结合，即浓硫酸水解，液固比 42：1、浓硫酸浓度 70%、水浴时间20 min、水浴温度 55益；稀硫酸水解，液固比 115：1、浓硫酸浓度 5.5%、水解时间 155 min、水解温度 100益。 在此工艺中，还原糖得率为 48.78%。 该两段水解糖化法条件温和、操作简单，不需要高压，成本低廉，还原糖得率高，为割手密的进一步有效利用奠定了基础。 |
| 英文摘要: |
| Saccharum spontaneum L., which is a high-yield cellulose, is noticed as an energy plant at presentall over the world. The acid hydrolysis and saccharifying of straw is a key process in the fuel ethanol production. Inorder to solve the problem with low yield of acid hydrolysis and saccharifying in the technique of producing ethanolfrom biomass, by single factor orthogonal test, the process conditions of normal pressure two-stage acid hydrolysisare optimized as follow: the first section was concentrated sulphuric acid hydrolysis in 70% sulphuric acid at 55 for 20 min, and the ratio of liquid to solid was 421; the second section was dilute sulphuric acid hydrolysis in 5.5%sulphuric acid at 100for 155 min, and the ratio of liquid to solid was 1151. The yield of reducing sugar was48.78% in two-stage hydrolysis. The technology of two-stage acid hydrolysis has advantages of moderate condition,simple flow, low pressure, low cost, high reducing sugar yield and broad application prospect. The results may be thebase of utilization of S. spontaneum L. |
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