| VPO催化剂再生动力学特性研究 |
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| 引用本文： | 潘向东,梁日忠,李英霞,陈标华,李成岳. VPO催化剂再生动力学特性研究[J]. 北京化工大学学报(自然科学版), 2002, 29(3): 17-19+23. DOI: 10.3969/j.issn.1671-4628.2002.03.005 |
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| 作者姓名： | 潘向东 梁日忠 李英霞 陈标华 李成岳 |
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| 作者单位： | 北京化工大学可控化学反应教育部重点实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金委员会和中国石化集团公司联合资助项目;29792073-3; |
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| 摘 要： | 利用热分析技术研究了流动气氛下WPO催化剂再氧化的反应行为及非等温反应动力学,采用几种不同的方法处理实验数据均得到较一致的结果,据此推断VPO催化剂最可几的氧化再生机理符合相边界控制的收缩核模型,得到了动力学方程为dα/dt=Aexp(-E/RT)×3(1-α)2/3,活化能E=238.57kJ/mol,指前因子A=7.74×1013s-1.
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| 关 键 词： | VPO催化剂 再氧化 动力学 热分析 |
Reoxidation kinetic characteristics of the VPO catalyst |
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| PAN Xiang-dong LIANG Ri-zhong LI Ying-xia CHEN Biao-hua LI Cheng-yue. Reoxidation kinetic characteristics of the VPO catalyst[J]. Journal of Beijing University of Chemical Technology, 2002, 29(3): 17-19+23. DOI: 10.3969/j.issn.1671-4628.2002.03.005 |
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| Authors: | PAN Xiang-dong LIANG Ri-zhong LI Ying-xia CHEN Biao-hua LI Cheng-yue |
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| Affiliation: | he Key Laboratory of Science and Technology of Controllable Chemical Reactions; Ministry of Education; Beijing University of Chemical Technology; Beijing; China |
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| Abstract: | DTA, TG and DTG techniques were used to investigate the thermal oxidation process and reaction kinetics of a domestic VPO catalyst at the heating rate of 2.5、5、10 and 20 K/min in the air, respectively. Several methods for estimating the kinetic parameters and identifying the mechanism of the reaction-diffusion process were compared, and used to treat the non-isothermal kinetic data. The results obtained suggest that the reoxida-tion process of the catalyst obeys the contracted core model controlled by the phase border.The reaction rate equation can be expressed sa da/dt=A exp(-E/RT)*(1-a)2/3,where the activation energy E=238.57kj/mol,the frequency fctor A=7.74*10 13 s - |
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| Keywords: | VPO catalyst reoxidation kinetics thermal analysis |
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