以类水滑石为前驱体制备的复合氧化物同时吸附烟道气中SO_2和NO研究  

Simultaneous adsorption of SO_2 and NO in flue gas over mixed oxides derived from hydrotalcite-like compounds

作　　者：余谟鑫[1] 徐建昌[1] 覃柯敏[1] 李雪辉[1] 王乐夫[1] 

机构地区：[1]华南理工大学化工与能源学院,广东广州510640

出　　处：《工业催化》2006年第3期39-43,共5页Industrial Catalysis

基　　金：国家自然科学基金资助项目(20076017);广东省自然科学基金资助项目(980512000428);广东省科技攻关项目(2KB06601S);广东省环保局科技基金资助项目(2000114)

摘　　要：采用共沉淀法制备NiMgAlO、CuMgAlO、ZnMgAlO和FeMgAlO类水滑石复合氧化物,并用于常压下同时氧化吸附模拟烟道气中的SO2和NO。模拟烟道气中SO2的摩尔分数为1%,NO的摩尔分数为0.2%,O2以及He作为载气。研究结果表明,这四种催化剂对烟道气中的SO2和NO具有良好的同时氧化吸附效果。比较四种催化剂的吸附效果发现,NiMgAlO和CuMgAlO要优于ZnMgAlO和FeMgAlO,且NiMgAlO对SO2和NO的吸附效果最佳。Mixed oxides NiMgAlO, CuMgAlO, ZnMgAlO, FeMgAlO derived from hydrotaleite-like eompounds were prepared by eoprecipitation, and used in simultaneously adsorption of SO2 and NO in flue gas at atmospheric pressure. Typically the molar composition of the feed gas was 1% SO2,0.2% NO and O2 with ultra-high purity He as the diluent. The results showed that the catalysts were excellent materials for the simultaneous oxidative adsorption of SO2 and NO. NiMgAlO, CuMgAlO catalysts exhibited better properties than ZnMgAlO and FeMgAlO. NiMgAlO catalyst showed best behavior in simultaneous adsorption of S02 and NO.

关 键 词：类水滑石复合氧化物 前躯体 吸附 

分 类 号：TQ426.6[化学工程] X511[环境科学与工程—环境工程]