负载Mn型类水滑石结构催化剂同时催化净化NO<sub><i>x</i></sub>和o-DCB研究

梁宝瑞; 王斌; 马志亮; 刘俊杰; 徐水洋; 魏振强; 张晖

doi:10.13205/j.hjgc.202202002

负载Mn型类水滑石结构催化剂同时催化净化NO_x和o-DCB研究

doi: 10.13205/j.hjgc.202202002

1. 北京科技大学天津学院环境工程系, 天津 301830;
2. 天津市水利工程有限公司, 天津 300222;
3. 北京科技大学能源与环境工程学院, 北京 100083

基金项目:

天津市教委科研计划资助项目(2019KJ147)

详细信息

作者简介:
梁宝瑞(1986-),男,博士,讲师,主要研究方向为大气污染控制工程。18910284067@126.com

通讯作者:
王斌(1972-),男,硕士,副教授,主要研究方向为环境保护项目教学化及应用。yhhy86@126.com

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出版历程
- 收稿日期: 2021-02-23
- 网络出版日期: 2022-04-02
- 刊出日期: 2022-04-02

SIMULTANEOUS CATALYTIC PURIFICATION OF NO_x AND O-DCB WITH SUPPORTED Mn HYDROTALCITE-LIKE STRUCTURE CATALYST

1. Department of Environmental Engineering, Tianjin College, University of Science and Technology Beijing, Tianjin 301830, China;
2. Tianjin Water Engineering Co., Ltd, Tianjin 300222, China;
3. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083,China

摘要

摘要: 采用共沉淀法成功制备了钴铁层状双氢氧化物结构载体(CoFe-LDH),并采用浸渍法负载活性组分Mn经煅烧制备不同Mn负载量的类水滑石结构催化剂——Mn_xCoFe-LDO催化剂(其中x为硝酸锰与CoFe-LDH的质量比),探究了催化剂对典型工业尾气中氮氧化物(NO_x)和含氯挥发性有机化合物(CVOCs)的催化性能,并对催化剂进行XRD、H₂-TPR、NH₃-TPD及TEM-EDX mapping等表征。结果表明:Mn的加入会极大提高钴铁层状氧化物(CoFe-LDO)的催化性能,其中质量比为0.25的催化剂活性最高,测试温度范围内脱硝率维持在90%以上,且300℃邻二氯苯(o-DCB)的去除率可达到95.4%。在该配比下制备的催化剂活性组分Mn的分散性最好,且表面酸性位数量及氧化还原性能最佳。
- 类水滑石 /
- NO_x /
- CVOCs /
- 催化氧化
Abstract: The cobalt-iron layered double hydroxide structure carrier(CoFe-LDH) was successfully prepared by the co-precipitation method, and the active component Mn was loaded by the impregnation method and calcined to prepare the hydrotalcite-like structure catalyst Mn_xCoFe-LDO catalyst with different Mn loadings(Where x was the mass ratio of manganese nitrate solution to CoFe-LDH). The catalytic performance of the catalyst on nitrogen oxides(NO_x) and chlorinated volatile organic compounds(CVOCs) in typical industrial exhaust gas was explored, and the catalyst was characterized by XRD, H₂-TPR, NH₃-TPD and TEM-EDX mapping. The results showed that the addition of Mn greatly improved the catalytic performance of CoFe-LDO. Among them, the catalyst with a mass ratio of 0.25 had the highest activity. The denitration efficiency was maintained above 90% in the test temperature range, and the efficiency of o-DCB removal at 300 ℃ could be up to 95.4%. This was mainly due to the best dispersibility of the active component Mn of the catalyst prepared under this ratio, and the best redox performance.
- hydrotalcite-like /
- NO_x /
- CVOCs /
- catalytic oxidation

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