| 在Mo-Bi-Ce/SiO2催化剂上甲醇氧化制甲醛的Redox机理及其动力学 |
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| 引用本文： | 俞启全,金韵,张钒,郭沁林,桂琳琳.在Mo-Bi-Ce/SiO2催化剂上甲醇氧化制甲醛的Redox机理及其动力学[J].物理化学学报,1989,5(6):699-704. |
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| 作者姓名： | 俞启全 金韵 张钒 郭沁林 桂琳琳 |
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| 作者单位： | Department of Chemistry; Peking University; Institute of Physical Chemistry; Peking University |
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| 基金项目： | 北京大学结构化学开放研究实验室课题 |
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| 摘 要： | 用外循环无梯度反应器研究了甲醇氧化制甲醛的动力学。动力学实验结果用二步骤Redox模型描述。动力学方程中的参数用线性最小二乘法估计。甲醇的反应级数m和氧的反应级数n与温度有关, m与n的和接近于1, 反应级数的变化可用Redox机理动力学解释。不同处理催化剂的XPS分析结果证实, 反应按Redox机理进行。
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| 关 键 词： | 甲醛 甲醇 氧化还原机理 动力学 |
| 收稿时间： | 1988-05-11 |
| 修稿时间： | 1989-05-08 |
THE REDOX MECHANISM AND KINETICS OF OXIDATION OF METHANOL OVER Mo-Bi-Ce/SiO2 CATALYST |
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| Yu Qiquan,Jin Yun,Zhang Fan,Guo Qinlin,Gui Linlin.THE REDOX MECHANISM AND KINETICS OF OXIDATION OF METHANOL OVER Mo-Bi-Ce/SiO2 CATALYST[J].Acta Physico-Chimica Sinica,1989,5(6):699-704. |
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| Authors: | Yu Qiquan Jin Yun Zhang Fan Guo Qinlin Gui Linlin |
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| Institution: | Department of Chemistry; Peking University; Institute of Physical Chemistry; Peking University |
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| Abstract: | The kinetics of oxidation of methanol to formaldehyde on Mo-Bi-Ce/SiO_2 catalyst has been investigated in an external recirculation gradientless reactor. The kinetic data can be described by a two-stage redox model. The parameters of the kinetic equation were estimated by the linear least square method. The m-order with respect to methanol and n-order with respect to oxygen depended on the reaction temperature and m+n=1 (the sum of m and n is close to 1). The change of reaction order was interpreted by the kinetics of redox mechanism. XPS results which come from different treated catalysts verify the redox mechanism mentioned above. |
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