| 木屑及其水热炭的热解特性和动力学对比 |
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| 引用本文： | 邢献军,杨静,范方宇,李永玲,张贤文.木屑及其水热炭的热解特性和动力学对比[J].农业工程学报,2017,33(4):258-264. |
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| 作者姓名： | 邢献军 杨静 范方宇 李永玲 张贤文 |
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| 作者单位： | 1. 合肥工业大学先进能源技术与装备研究院,合肥 230009;合肥工业大学汽车与交通工程学院,合肥 230009;2. 合肥工业大学机械工程学院,合肥,230009;3. 合肥工业大学化学与化工学院,合肥,230009 |
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| 基金项目： | 国家科技支撑计划（2012BAD30B01） |
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| 摘 要： | 为全面了解木屑及其水热炭的差异,获取更多关于水热炭作为化工燃料的使用特性。该文使用热重分析仪和傅里叶红外光谱仪对比研究了木屑及其水热炭在热解过程(10℃/min升温速率)中的失重特性及其官能团变化,分析了升温速率(10、20、30℃/min)对2种样品热解失重过程的影响,采用DAEM(分布活化能模型)计算了2种样品不同转化率下的活化能。结果表明:1)在200℃反应6 h得到的木屑水热炭,化学结构与木屑相似。2)在热解过程(10℃/min升温速率)中,木屑与水热炭最大失重速率分别为0.817%/℃和1.224%/℃,温度为353.57℃和363.42℃;不同终温下半焦红外光谱分析发现,水热炭更易解聚,其碳化速度更快。3)对比3种不同升温速率下2种样品的失重曲线可知,水热处理没有影响热滞后现象,样品焦炭生成量与升温速率无关,焦炭生成量平均值水热炭大于木屑。4)DAEM模型适用于2种样品热解反应活化能的求解,木屑及其水热炭活化能分别为99.33~252.72 k J/mol和63.77~211.68 k J/mol,当转化率在0.30到0.80范围时,木屑的活化能高于水热炭。研究结果为木屑水热炭热化学转化制备焦炭提供理论依据。
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| 关 键 词： | 木屑 热解 活化能 水热炭 傅里叶红外光谱 |
| 收稿时间： | 2016/6/24 0:00:00 |
| 修稿时间： | 2016/7/26 0:00:00 |
Comparison of pyrolysis characteristics and kinetics of sawdust and its hydrochar |
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| Xing Xianjun,Yang Jing,Fan Fangyu,Li Yongling and Zhang Xianwen.Comparison of pyrolysis characteristics and kinetics of sawdust and its hydrochar[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(4):258-264. |
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| Authors: | Xing Xianjun Yang Jing Fan Fangyu Li Yongling and Zhang Xianwen |
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| Institution: | 1. Institute of Advanced Energy Technology & Equipment, Hefei University of Technology, Hefei 230009, China; 2. School of Automobile and Transportation Engineering, Hefei University of Technology, Hefei 230009, China;,3. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;,4. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;,3. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China; and 1. Institute of Advanced Energy Technology & Equipment, Hefei University of Technology, Hefei 230009, China; 2. School of Automobile and Transportation Engineering, Hefei University of Technology, Hefei 230009, China; |
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| Abstract: | |
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| Keywords: | sawdust pyrolysis activation energy hydrochar fourier infrared spectrum |
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