| 多组分钼铋系催化剂补氧再生本征动力学 |
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| 引用本文： | 武新颖,于光认,王亚辉,刘长江,陈晓春.多组分钼铋系催化剂补氧再生本征动力学[J].北京化工大学学报(自然科学版),2009,36(5):5-8. |
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| 作者姓名： | 武新颖 于光认 王亚辉 刘长江 陈晓春 |
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| 作者单位： | 北京化工大学,化学工程学院,北京,100029;中国石化工程建设公司,化工工艺室,北京,100101 |
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| 基金项目： | 高等学校博士学科点专项科研基金 |
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| 摘 要： | 利用热重法研究了一种用于生产丙烯腈的多组分钼铋催化剂的补氧再生本征动力学。通过应用Achar-Brindley-Sharp微分和Coats-Redfern积分对照的方法得到了动力学三因子，分别为：活化能125.4kJ/mol，指前因子(A)为1.82×108min-1，动力学机理函数的积分形式为g(α)= ln1-α)，表明再氧化反应机理为单分子成核生长。
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| 关 键 词： | 热重法 本征动力学 再氧化 |
| 收稿时间： | 2008-12-16 |
Intrinsic kinetics of reoxidation of a multicomponent molybdate |
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| WU XinYing,YU GuangRen,WANG YaHui,LIU ChangJiang,CHEN XiaoChun.Intrinsic kinetics of reoxidation of a multicomponent molybdate[J].Journal of Beijing University of Chemical Technology,2009,36(5):5-8. |
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| Authors: | WU XinYing YU GuangRen WANG YaHui LIU ChangJiang CHEN XiaoChun |
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| Affiliation: | 1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029;2. Petrochemical Process Department, Sinopec Engineering Incorporation, Beijing 100101, China |
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| Abstract: | The intrinsic kinetics of reoxidation of a multicomponent molybdate catalyst for propylene ammoxidation have been studied by thermogravimetric techniques. The kinetic triplet of this reaction was obtained by comparison of the Achar-Brindley-Sharp differential and the Coats-Redfern integral equation. The activation energy and pre-exponential factor (A) were found to be 125.4kJ/mol and 1.82×108min-1, respectively. The kinetic model is best expressed by Avrami-Erofeev equation i.e., g(α)=-ln(1-α), suggesting a nucleation and growth mechanism (n=1). |
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| Keywords: | thermogravimetric analysis intrinsic kinetics reoxidation |
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