中国电机工程学报 2008, 28(17) 55-60  DOI:      ISSN: 0258-8013 CN: 11-2107/TM
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水焦浆
水煤浆
热重分析
动力学分析
本文作者相关文章
赵卫东
PubMed
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水焦浆燃烧动力学参数求解方法
赵卫东 刘建忠 张保生 周俊虎 岑可法
能源清洁利用国家重点实验室(浙江大学) 能源清洁利用国家重点实验室(浙江大学) 中国矿业大学机电学院 能源清洁利用国家重点实验室(浙江大学) 能源清洁利用国家重点实验室(浙江大学)
摘要： 利用热重分析仪获得水焦浆的燃烧失重特性曲线，采用四种动力学模型求解了水焦浆的活化能，分析了其动力学特性，并与兖州烟煤水煤浆进行对比。结果表明，同一反应深度（转化率a）水焦浆的活化能低于烟煤水煤浆；Coats-Redfern法可以得到燃烧过程的平均活化能，得到水焦浆的反应级数为0.7，烟煤水煤浆的反应级数为1.0；等转化率的Flynn-Wall-Ozawa法和Friedman-Reich-Levi法可以得到活化能随转化率的变化趋势，后者结果更可靠；非Arrhenius公式的Dollimore法可以得到和Friedman-Reich-Levi法相近的活化能结果,这两种方法可以作为求解水焦浆燃烧动力学参数的优选方法。
关键词： 水焦浆   水煤浆   热重分析   动力学分析  
Kinetic Parameters of Petroleum Coke Water Slurry Combustion by Different Methods
ZHAO Wei-dong LIU Jian-zhong ZHANG Bao-sheng ZHOU Jun-hu CEN Ke-fa
State Key Laboratory of Clean Energy Utilization(Zhejiang University) College of Mechanical and Electrical Engineering, China University of Mining and Technology State Key Laboratory of Clean Energy Utilization (Zhejiang University) State Key Laboratory of Clean Energy Utilization (Zhejiang University)
Abstract: Thermoanalysis curves of combustion of a petroleum coke water slurry(PCWS) were recorded by a thermogravimetric apparatus. Kinetic parameters such as activatin energy of PCWS were evaluated by four different methods, and compared with that of a coal water slurry(CWS) prepared with bituminous coal from Yanzhou, Shandong. Results showed that the activation energy of PCWS was smaller than that of the bitumous CWS at certain conversion rates; using Coats-Refern method, an average activation energy of the whole combustion process can be achieved, and the reaction order, n, of PCWS and Yanzhou CWS was 0.7 and 1.0 respectively; the relationship between activation energy and conversion rates was plotted by Flynn-Wall-Ozawa method, also by Friedman-Reich-Levi method, and the results of the latter were more credible; activation energy obtained by Dollimore method, which was not originated from the Arrhenius formula, approximated to that by Friedman-Reich-Levi method.The last two methods are superior to others in evaluating kinetic parmeters of PCWS.
Keywords: petroleum coke water slurry   coal water slurry   thermogravimetric analysis   dynamic analysis  
收稿日期 2007-12-10 修回日期 1900-01-01 网络版发布日期  
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通讯作者: 赵卫东
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作者Email: weidong80@zju.edu.cn
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