| 生物质热反应机理与活化能确定方法Ⅰ.干燥段研究 |
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| 引用本文： | 陈登宇,朱锡锋. 生物质热反应机理与活化能确定方法Ⅰ.干燥段研究[J]. 燃料化学学报, 2011, 39(8): 580-584 |
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| 作者姓名： | 陈登宇 朱锡锋 |
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| 作者单位： | Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China |
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| 基金项目： | 国家自然科学基金(50930006); 国家重点基础研究发展规划(973计划,2007CB210203); 中国科学院知识创新工程方向性项目(KGCX2-YW-330) |
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| 摘 要： | 干燥段是生物质热解的第一个过程.采用热分析仪研究了杉木木屑干燥段质量和热量的变化,推导了非等温干燥动力学模型,探讨了热质传输机理.结果表明,随着温度的升高,木屑含湿量迅速下降,80℃左右出现一个明显的失重峰；非等温干燥动力学Page模型能很好地模拟木屑干燥过程,木屑干燥活化能为12.6 kJ/mol；水分传输与热量传递...
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| 关 键 词： | 生物质 非等温干燥 活化能 热质传输 |
| 收稿时间： | 2010-11-01 |
Thermal reaction mechanism of biomass and determination of activation energy I.drying section |
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| CHEN Deng-yu,ZHU Xi-feng. Thermal reaction mechanism of biomass and determination of activation energy I.drying section[J]. Journal of Fuel Chemistry and Technology, 2011, 39(8): 580-584 |
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| Authors: | CHEN Deng-yu ZHU Xi-feng |
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| Affiliation: | CHEN Deng-yu,ZHU Xi-feng(Anhui Province Key Laboratory of Biomass Clean Energy,University of Science and Technology of China,Hefei 230026,China) |
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| Abstract: | The first step of biomass pyrolysis corresponds to water evaporation. Thermal analysis instrument was used to determine the mass and heat change of fir wood during drying process. Non-isothermal drying kinetics model was derived to explore the mechanism of heat and mass transfer. The results show that moisture content decreases rapidly and weight loss peak appears at 80℃. Page model for non-isothermal drying kinetics can well simulate wood drying process and the drying activation energy is 12.6kJ/mol. Water and heat transfer have close relationship and the dry heat is mainly used for water evaporation. The value of heat requirement is 426kJ/kg and the simulated results show good agreement with experimental values. |
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| Keywords: | biomass non-isothermal drying activation energy mass and heat transfer |
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