铈基纳米材料催化剂上氯代有机污染物的低温催化消除

项目名称： 铈基纳米材料催化剂上氯代有机污染物的低温催化消除

项目编号： No.21277047

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 环境科学、安全科学

项目作者： 王幸宜

作者单位： 华东理工大学

项目金额： 80万元

中文摘要： 氯代烃类有机化合物的排放构成了对环境持久性的污染，其催化消除以低温转化和高选择性不造成二次污染而成为最经济、最可靠的方法。本申请提出通过溶剂热法、水热合成法、表面活性剂自组装等技术制备不同形貌、晶面的CeO2纳米材料，研究CeO2纳米微观结构对氧的吸附活化能力、Cl的吸附强度以及解理水分子的能力的影响；通过引入Ru和其他过渡金属氧化物，多层次的修饰Ce基催化材料，造就多种活性中心的结合，实现Cl的转移以及与活性氧的交换，克服现有Ce基催化体系中Cl的强吸附而导致失活问题；同时提高氯代烃类低温氧化活性和HCl氧化活性以及抑制氯代反应，使Ce基催化剂在Cl2的存在下不催化氯代反应，将氯代烃类化合物高选择性的转化成HCl、H2O、CO2，建立氯代烃类化合物低温消除长期稳定操作体系。本申请课题的研究成功，将为我国在氯代烃类的低温催化消除提供新思想和新方法，并获完全的知识产权。

中文关键词： 氯代烃类；催化燃烧；氧化铈；过渡金属；催化氧化

英文摘要： The exhaust containing chlorinated organic volatile compounds (CVOC) presents persistent environmental pollution. Catalytic elimination of organic chlorinated hydrocarbons is most economical and reliable, because of the conversion at low temperature and high selectivity. In this proposal, solvent and water thermal synthesis, surfactant self-assembly will be used for preparing CeO2 nano-materials with different morphologies and lattice faces. The effect of nano-CeO2 mricrostructure on the ability to adsorb and activate oxygen, adsorption strength of Cl species and hydrolysis will be investigated. Through the introduction of Ru and some transitional metal oxides, the Ce-base materials can be modified with several levers so as to create the combination of several active sites for different reactions, realize the removal of Cl species from the catalyst surface, and exchange Cl species with active oxygen. Therefore, a strong adsorption of Cl species produced during CVOC decomposition resulting in the deactivation whish is serious question can be overcome. At the same time, the activities for CVOC oxidation at low temperature and HCl oxidation will be promoted and the activity for chlorination of CVOC will be inhibited. As a result, the chlorination may not proceed over Ce-based catalysts even in the presence of a sma

英文关键词： Chlorinated compounds；catalytic combustion；Ceria；transition metals；catalytic oxidation