江汉大学学报(自然科学版) ›› 2019, Vol. 47 ›› Issue (1): 5-11.doi: 10.16389/j.cnki.cn42-1737/n.2019.01.001

• 烟层与废气污染治理研究 • 上一篇    下一篇

不同方法制备的Cu/OMS-2 催化剂上甲苯催化氧化性能研究

胡明华,岳琳*,郭矩成,王雯君   

  1. 江汉大学 工业烟尘污染控制湖北省重点实验室,化学与环境工程学院,湖北 武汉 430056
  • 出版日期:2019-02-28 发布日期:2019-02-25
  • 通讯作者: 岳琳
  • 作者简介:胡明华(1988—),女,实验师,硕士,研究方向:大气污染控制。
  • 基金资助:
    国家自然科学基金资助项目(21407062,21477095,21677114,21577046)

Catalytic Oxidation of Toluene Over Cu-modified Manganese Oxide Octahedral Molecular Sieves Synthesized with Different Methods

HU Minghua,YUE Lin*,GUO Jucheng,WANG Wenjun   

  1. Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China
  • Online:2019-02-28 Published:2019-02-25
  • Contact: YUE Lin

摘要: 利用不同方法制备了Cu负载OMS-2分子筛材料,并测试其催化氧化甲苯的性能,发现催化活性表现为:OMS-2 > Cu/OMS-2(离子交换法)> Cu/OMS-2(前处理法)。其中OMS-2 具有最好的催化性能,T90%(甲苯转化率为90%时的催化氧化温度)为225 ℃。由材料表征结果分析可知,Cu 的加入减少了OMS-2 催化剂表面Mn3+/Mn4+电子对的数量,降低了催化剂的还原性和表面氧移动性,导致Cu/OMS-2催化性能相比OMS-2有所降低。

关键词: Cu/OMS-2, 催化氧化, 甲苯, 氧化还原电对, VOCs

Abstract: Cu/OMS-2 catalysts were prepared with different methods,and their catalytic performance was investigated for the oxidation of toluene. The catalytic activity was revealed as sequence below: OMS-2 > Cu/OMS-2(ion exchange method)> Cu/OMS-2(pretreatment method). It was found that OMS-2 had best catalytic performance;it achieved 90% toluene conversion at 225 ℃ due to the better reducibility. The material characterization results showed the addition of Cu reduced the Mn3+/Mn4+ electron pairs on the surface of OMS-2 catalyst,it reduced the reducibility and oxygen mobility on the surface of OMS-2 catalyst,which led to the decrease of catalytic performance of Cu/OMS-2 compared with OMS-2.

Key words: Cu/OMS-2, catalytic oxidation, toluene, redox pairs, VOCs

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