锰基多元催化剂调控制备及室温臭氧强化催化氧化低浓度有机废气机理研究

项目名称： 锰基多元催化剂调控制备及室温臭氧强化催化氧化低浓度有机废气机理研究

项目编号： No.51208207

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 黄海保

作者单位： 中山大学

项目金额： 25万元

中文摘要： 有机废气来源广泛、成分复杂，是国家环境保护"十二五"规划重点控制的一类污染物。臭氧催化具有氧化能力强及反应条件温和等优点，是一种新兴高效的有机废气治理技术。针对反应过程存在的催化剂活性低、易失活等缺点，本项目通过调控活性炭载体、过渡金属氧化物活性组分及合成工艺等方法，制备高效、稳定负载型锰基多元催化剂；考察多元催化剂室温下臭氧强化催化氧化苯活性，表征分析催化剂吸附性能、比表面积、粒径和分散度等结构性能，建立催化剂构效关系，明确影响污染物降解的重要结构参数，掌握调控催化活性及稳定性的方法，揭示多元催化剂作用机制。采用原位红外等手段，追踪反应物及中间产物在催化剂表面的吸附、迁移和转化历程，阐明苯臭氧催化氧化历程及作用机理。考察并优化反应工艺，研究残余臭氧消除，为应用提供基础数据。该研究对于丰富空气污染治理技术与理论以及实现通过臭氧催化氧化途径治理低浓度有机废气具有重要意义。

中文关键词： 臭氧催化氧化；MnO2/改性载体；苯降解；催化失活；工艺参数

英文摘要： Volatile organic compounds (VOCs), with complex composition and numerous emission sources, are one of the priority pollutants listed in the "12th 5-Year Environmental Protection Plan" of China. Catalytic ozonation presents an emerging efficient technology for VOCs destruction due to its advantages like strong oxidation capacity and mild reaction conditions. In this project, efficient manganese-based multi-component catalysts of good stability will be developed by controlling catalyst carriers, active components and preparation methods to overcome the limitation with catalytic ozonation such as low catalytic activity and deactivation of catalysts. The catalysts are evaluated in form of catalytic ozonation of benzene at room temperature and further characterized to obtain the structural information including adsorption capacity, surface area, particle size and dispersion. This information will be used to establish catalytic structure-activity relationship, clarify the key structural parameters of multi-component catalysts and reveal their machanism on the increased catalytic activities and stability. The adsorption, migration and transformation of reactants and intermediates are tracked and analyzed by means such as in situ IR to find out the mechanism and pathways of benzene catalytic ozonation. The effect of ope

英文关键词： Catalytic ozonation；MnO2/modified support；benzene destruction；catalytic deactivation；operating parameters