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不同加热方式下催化氧化甲苯的性能研究

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卜龙利, 刘海楠, 王晓晖, 张浩, 孙剑宇, 杨力. 不同加热方式下催化氧化甲苯的性能研究[J]. 环境化学, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
引用本文: 卜龙利, 刘海楠, 王晓晖, 张浩, 孙剑宇, 杨力. 不同加热方式下催化氧化甲苯的性能研究[J]. 环境化学, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
shu
BO Longli, LIU Hainan, WANG Xiaohui, ZHANG Hao, SUN Jianyu, YANG Li. Study on the catalytic oxidation of toluene under different heating modes[J]. Environmental Chemistry, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
Citation: BO Longli, LIU Hainan, WANG Xiaohui, ZHANG Hao, SUN Jianyu, YANG Li. Study on the catalytic oxidation of toluene under different heating modes[J]. Environmental Chemistry, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
shu

不同加热方式下催化氧化甲苯的性能研究

  • 1.

    西安建筑科技大学环境与市政工程学院, 710055

  • 基金项目:

    西安市产业技术创新计划-技术转移促进工程项目(CX12176-4).

Study on the catalytic oxidation of toluene under different heating modes

  • 1.

    School of Environmental and municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China

  • Fund Project:

  • 摘要: 研究考察了微波单模腔、多模腔与传统电炉三种不同加热方式下甲苯的催化氧化性能,分析不同加热方式下进出口气体温度和固定床反应温度的变化,并对实验前后的Cu-Mn-Ce/TiO2-分子筛催化剂进行了扫描电镜、X射线衍射和比表面积等表征测试.研究表明,相同工艺条件下电炉加热、微波多模腔与单模腔加热对甲苯的去除效率分别为77%、83%和94%,对应的床层反应温度为265℃、215℃和145℃,微波加热的选择性、"热点效应"和偶极极化作用提高了甲苯的降解效率并降低其氧化温度和工艺处理能耗,微波单模腔内高的能量密度显著提高了甲苯的氧化效率并降低反应温度.催化剂表征发现,微波加热对催化剂结构与活性组分的分布几乎没有影响,而电炉加热则导致催化剂表面烧结与活性组分团聚,微波加热下催化剂更大的比表面积有利于甲苯的吸附与氧化降解.
    Abstract: Catalytic oxidation of toluene by Cu-Mn-Ce/TiO2-molecular sieve catalyst under microwave single-mode heating, multi-mode heating and electric furnace heating was investigated respectively, and inlet gas temperature, outlet gas temperature and reaction bed temperature variations were also examined. Used catalysts were characterized by scanning electron microscope, X-ray diffractometer and specific surface area analyzer, and compared with the new catalysts. The results showed that the removal rates of toluene were 77%, 83% and 94% respectively for electric heating, microwave multi-mode heating and single-mode heating under the same experimental conditions, corresponding to relative bed temperature of 265℃, 215℃ and 145℃. Selectivity and ‘hot spots' effect of microwave heating and dipole polarization of microwave improved the removal rate of toluene, and also reduced the oxidation reaction temperature and energy consumption. High energy density in single-mode cavity significantly increased toluene oxidation and decreased reaction temperature. Characteristion of the catalyst indicated that microwave heating had no influence on the structure and active component dispersion. However, electric furnace heating resulted in surface sintering and agglomeration of active components in the catalyst. Specific surface area was larger under microwave heating than conventional heating, which is beneficial to adsorption and oxidation degradation of toluene.
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  • 收稿日期:  2012-11-16
卜龙利, 刘海楠, 王晓晖, 张浩, 孙剑宇, 杨力. 不同加热方式下催化氧化甲苯的性能研究[J]. 环境化学, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
引用本文: 卜龙利, 刘海楠, 王晓晖, 张浩, 孙剑宇, 杨力. 不同加热方式下催化氧化甲苯的性能研究[J]. 环境化学, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
shu
BO Longli, LIU Hainan, WANG Xiaohui, ZHANG Hao, SUN Jianyu, YANG Li. Study on the catalytic oxidation of toluene under different heating modes[J]. Environmental Chemistry, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
Citation: BO Longli, LIU Hainan, WANG Xiaohui, ZHANG Hao, SUN Jianyu, YANG Li. Study on the catalytic oxidation of toluene under different heating modes[J]. Environmental Chemistry, 2013, 32(8): 1524-1531. doi: 10.7524/j.issn.0254-6108.2013.08.017
shu

不同加热方式下催化氧化甲苯的性能研究

  • 1. 西安建筑科技大学环境与市政工程学院, 710055
  • 收稿日期:  2012-11-16
基金项目:

西安市产业技术创新计划-技术转移促进工程项目(CX12176-4).

摘要: 研究考察了微波单模腔、多模腔与传统电炉三种不同加热方式下甲苯的催化氧化性能,分析不同加热方式下进出口气体温度和固定床反应温度的变化,并对实验前后的Cu-Mn-Ce/TiO2-分子筛催化剂进行了扫描电镜、X射线衍射和比表面积等表征测试.研究表明,相同工艺条件下电炉加热、微波多模腔与单模腔加热对甲苯的去除效率分别为77%、83%和94%,对应的床层反应温度为265℃、215℃和145℃,微波加热的选择性、"热点效应"和偶极极化作用提高了甲苯的降解效率并降低其氧化温度和工艺处理能耗,微波单模腔内高的能量密度显著提高了甲苯的氧化效率并降低反应温度.催化剂表征发现,微波加热对催化剂结构与活性组分的分布几乎没有影响,而电炉加热则导致催化剂表面烧结与活性组分团聚,微波加热下催化剂更大的比表面积有利于甲苯的吸附与氧化降解.

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