用后柴油机尾气催化剂氨浸处理研究  

Research of Ammonia Leaching Process on the Spent Diesel Exhaust Catalyst

作　　者：赵志鹏[1] 郭敏[1] 张梅[1] 

机构地区：[1]北京科技大学冶金与生态工程学院稀贵金属绿色回收与提取北京市重点实验室,北京100083

出　　处：《安全与环境工程》2015年第3期51-55,共5页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(51372019);国家重点基础研究发展计划(973计划)项目(2014CB643401)

摘　　要：以用后柴油机尾气催化剂体系V2O5-MoO3/TiO2为研究对象,采用氨浸的方法,在V和Mo有效提取的同时,制备得到TiO2光催化材料,研究氨浸处理前后样品的化学成分、晶体结构以及微观形貌对其光催化性能的影响。结果表明:氨浸处理后的滤渣主要是锐钛矿型TiO2,具有较好的光催化效果,其在光催化降解罗丹明B溶液120min后,光催化降解率可达86.6%,可以作为光催化材料使用;光降解后的溶液中溶出的V离子含量在国家标准要求范围之内,不会对水体造成污染,从而基本实现了用后柴油机尾气催化剂综合利用的目的。By using an ammonia leaching process,this paper extracts molybdenum （Mo） and vanadium （V） from the spent diesel exhaust catalyst V2O5-MoO3/TiO2 effectively,and obtains the photocatalyst TiO2. The paper studies the effects of chemical composition,crystal phase and micromorphology on the photocat- alytic properties of the spent diesel exhaust catalyst and the ammonia leaching residue. The results indicate that the ammonia leaching residue is anatase type TiO2 and its photodegradation efficiency based on Rhoda- mine B solution could reach about 81.2% after degradation for 120 rain. In addition,the soluble vanadium i- ons content in the photodegradation solution is in the required range, which may not pollute the natural wa- ter. The paper may provide a pathway for comprehensive utilization of the spent diesel exhaust catalyst.

关 键 词：柴油机尾气 氨浸处理 V2O5-MoO3/TiO2催化剂 光催化材料 

分 类 号：X701[环境科学与工程—环境工程]