乙醇在Pt/ZSM-5上催化氧化动力学

doi:10.11949/j.issn.0438-1157.20180098

化工学报 ›› 2018, Vol. 69 ›› Issue (10): 4269-4275.DOI: 10.11949/j.issn.0438-1157.20180098

• 催化、动力学与反应器 • 上一篇下一篇

乙醇在Pt/ZSM-5上催化氧化动力学

苏佳乐, 周俊虎, 张兴, 赵庆辰, 王业峰, 杨卫娟

浙江大学能源清洁利用国家重点实验室, 浙江杭州 310027

收稿日期:2018-01-22 修回日期:2018-07-26 出版日期:2018-10-05 发布日期:2018-10-05
通讯作者: 杨卫娟
基金资助:
国家自然科学基金项目（51336010）。

Kinetics of ethanol oxidation over Pt/ZSM-5 catalyst

SU Jiale, ZHOU Junhu, ZHANG Xing, ZHAO Qingchen, WANG Yefeng, YANG Weijuan

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2018-01-22 Revised:2018-07-26 Online:2018-10-05 Published:2018-10-05
Supported by:
supported by the National Natural Science Foundation of China (51336010).

摘要/Abstract

摘要：

在内径为4 mm的石英管燃烧器中进行了富氧条件下乙醇在Pt/ZSM-5上的催化深度氧化动力学实验，反应温度控制在428 K以下，建立了Power-rate law模型和Langmuir-Hinshelwood模型来表征乙醇的低温深度氧化反应，Power-rate law模型和Langmuir-Hinshelwood模型的活化能分别为95.96和103.72 kJ·mol^-1，乙醇和氧气的反应级数分别为0.38和1.38。Langmuir-Hinshelwood模型中，乙醇的吸附常数比氧气的吸附常数大，说明乙醇在催化剂表面的吸附能力比氧气强，提高氧气的浓度比提高乙醇的浓度更有利于提高反应速率，这一点同样反映在氧气的反应级数比乙醇的反应级数大。

关键词: 乙醇, 催化作用, 动力学, 模型, 活化能, 氧化

Abstract:

The kinetics of ethanol deep oxidation over Pt/ZSM-5 catalyst was carried out under oxygen-rich conditions in a quartz tube burner with an inner diameter of 4 mm. The reaction temperature was controlled below 428 K. The Power-rate law model and the Langmuir-Hinshelwood model are established to characterize the ethanol deep oxidation for the low-temperature. The activation energy catalytic oxidation is 95.96 and 103.72 kJ·mol^-1 for the Power-rate law model and the Langmuir-Hinshelwood model respectively. The order of reaction for ethanol and oxygen is 0.38 and 1.38 respectively. In the Langmuir-Hinshelwood model, the adsorption constant of ethonal is larger than oxygen, indicating that the ethanol adsorption capacity of the catalyst surface is stronger than oxygen. Increasing the concentration of oxygen concentration is more conducive to increasing the reaction rate than ethanol, which is also reflected in the reaction order of oxygen is larger than ethanol.

Key words: ethanol, catalysis, kinetics, model, activation energy, oxidation

中图分类号:

TK16

苏佳乐, 周俊虎, 张兴, 赵庆辰, 王业峰, 杨卫娟. 乙醇在Pt/ZSM-5上催化氧化动力学[J]. 化工学报, 2018, 69(10): 4269-4275.

SU Jiale, ZHOU Junhu, ZHANG Xing, ZHAO Qingchen, WANG Yefeng, YANG Weijuan. Kinetics of ethanol oxidation over Pt/ZSM-5 catalyst[J]. CIESC Journal, 2018, 69(10): 4269-4275.

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乙醇在Pt/ZSM-5上催化氧化动力学

Kinetics of ethanol oxidation over Pt/ZSM-5 catalyst

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