| 谭丽红,马乐凡,刘定军,刘继权,曾 凯,梁宇婷.楠竹水预水解半纤维素溶出动力学的研究[J].中国造纸学报,2012,27(3):33-36 |
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| 楠竹水预水解半纤维素溶出动力学的研究 |
| Kinetic Model of Hemicellulose Dissolution during Water Prehydrolysis of Phyllostachys Heterocyclava |
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| DOI： |
| 中文关键词: 楠竹 水预水解 聚戊糖 动力学 |
| Key Words:phyllostachys heterocyclava water prehydrolysis pentosan kinetics |
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| 中文摘要: |
| 以楠竹为原料，在液比1∶10、温度140～170℃、保温时间0～300 min范围内进行了水预水解半纤维素溶出动力学的研究，经数据拟合得到水解反应动力学参数。研究表明，楠竹在140～170℃内，半纤维素水解存在明显的快反应和慢反应，其反应的活化能分别为83.29 kJ/mol和138.79 kJ/mol；温度对水预水解影响很大，在水预水解过程中必须严格控制反应温度，以达到在短时间内去除半纤维素、减少纤维素降解的目的。 |
| Abstract: |
| Kinetic model of hemicellulose dissolution during water prehydrolysis of phyllostachys heterocyclava under the conditions of temperature 140～170℃, reaction time of the temperature 0～300 min and ratio of liquid to solid 10∶1 was studied. All experimental data were fitted to get the kinetic parameters. The results showed that the hydrolysis reaction of hemicellulose was clearly divided into fast and slow stages from 140℃ to 170℃, the activation energys were 83.29 kJ/mol and 138.79 kJ/mol respectively. The reaction temperature had significant influence on the water prehydrolysis process, which must be strictly controlled to achieve the purpose of removing hemicellulose in a short time and reducing the degradation of cellulose. |
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