不同Cu负载量Cu-ZSM-5催化剂上正丁胺的选择催化氧化性能

邢欣; 李娜; 程杰

doi:10.13205/j.hjgc.202203009

不同Cu负载量Cu-ZSM-5催化剂上正丁胺的选择催化氧化性能

doi: 10.13205/j.hjgc.202203009

邢欣¹,
李娜²,
程杰^2, ,

1. 太原科技大学环境科学与工程学院, 太原 030024;
2. 中国科学院大学环境材料与污染控制技术研究中心挥发性有机物污染控制材料与技术国家工程实验室, 北京 101408

基金项目:

太原科技大学博士科研启动基金(20202053)

中央高校基本科研业务费专项资金

北京市科技计划课题(Z181100000118003)

详细信息

作者简介:
邢欣(1993-),女,讲师,主要研究方向为含氮挥发性有机污染物控制。xingxin916616@163.com

通讯作者:
程杰(1980-),男,教授,主要研究方向为环境材料和工业污染物催化控制的应用基础研究。jiecheng@ucas.ac.cn

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出版历程
- 收稿日期: 2021-07-28
- 网络出版日期: 2022-07-07

SELECTIVE CATALYTIC OXIDATION PERFORMANCE OF N-BUTYLAMINE OVER Cu-ZSM-5 CATALYSTS WITH DIFFERENT COPPER LOADINGS

XING Xin¹,
LI Na²,
CHENG Jie^{2
, ,}

1. College of Environmental Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. National Engineering Laboratory for VOCs Pollution Control Material&Technology, Research Center for Environmental Material and Pollution Control Technology, University of Chinese Academy of Sciences, Beijing 101408, China

摘要

摘要: 采用等体积浸渍法制备不同Cu负载量(1%、2%、5%和10%)的系列Cu-ZSM-5催化剂,并考察了Cu负载量对催化剂的正丁胺催化氧化性能的影响。通过XRD、N₂吸脱附、EPR、H₂-TPR、NH₃-TPD表征方法对催化剂的晶相结构和物化性质进行表征并研究构效关系。结果表明:Cu负载量为10%的催化剂催化活性最高,在300℃下实现了正丁胺的完全转化;而Cu负载量为5%的催化剂N₂选择性最佳,低温时N₂选择性明显高于其他催化剂。表征结果表明,催化剂的氧化还原性能主要影响正丁胺的转化率,Cu负载量影响催化材料的氧化还原性能,Cu负载量高的催化剂氧化还原性能优异。高N₂选择性主要归属于催化剂孤立态Cu²⁺物种和弱酸性位,催化剂的弱酸性位有利于正丁胺的吸附活化和深度氧化。
- 正丁胺 /
- 选择催化氧化 /
- Cu-ZSM-5催化剂 /
- 铜物种 /
- 酸性
Abstract: A series of Cu-ZSM-5 catalysts with different Cu loadings (1%, 2%, 5% and 10%) were synthesized by equal volume impregnation method, and the effect of Cu loading on n-butylamine catalytic oxidation was investigated. The crystal structure and physicochemical properties of the catalysts were characterized by XRD, N₂ adsorption desorption, EPR, H₂-TPR and NH₃-TPD, and the structure-activity relationship was studied. The catalyst with Cu loading of 10% had the highest catalytic activity, and the complete conversion of n-butylamine was achieved at 300℃. The catalyst with 5% Cu loading had the best N₂ selectivity, and the N₂ selectivity at low temperature was significantly higher than that of the other catalysts. The characterization results showed that the redox performance of the catalyst mainly affected the n-butylamine conversion, the different Cu loading affected the redox performance of the catalyst materials, and the catalyst with higher Cu loading had excellent redox performance. The high N₂ selectivity could be attributed to the isolated Cu²⁺ species and the weak acid sites of the catalyst, which was conducive to the adsorption activation and deep oxidation of n-butylamine to form N₂.
- n-butylamine /
- selective catalytic oxidation /
- Cu-ZSM-5 catalyst /
- copper species /
- acidity

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