摘要
以TiO2 /Al2 O3 /堇青石蜂窝陶瓷为载体 ,以V2 O5 MoO3 WO3 为活性组分 ,用于氨法选择性催化还原烟气中NO的新型催化剂 ,并对该催化剂的活性性能和微观结构进行了评价和表征 .同时 ,将该催化剂的活性性能与其它几种活性组分相同但载体、制备方法、结构不同的催化剂进行了对比 .对比结果表明 ,该新型催化剂能取得最好的选择性催化还原氮氧化物催化性能 .BET、FT IR、XPS表征实验结果表明 ,其高催化活性得益于大比表面积及大孔体积 ,而TiO2 /Al2 O3 /堇青石蜂窝陶瓷载体及其制备方法对获得好的催化剂构型起了至关重要的作用 .
A novel TiO 2/Al 2O 3/ceramic cordierite honeycomb(CC)-supported V 2O 5-MoO 3-WO 3 monolithic catalyst was studied for the selective reduction of NO with NH 3. The effects of reaction temperature, space velocity, NH 3/NO ratio and oxygen content on selective catalytic reduction(SCR)activity were evaluated. Two other V 2O 5-MoO 3-WO 3 monolithic catalysts supported on Al 2O 3/CC or TiO 2/CC support, two types of pellet catalysts supported on TiO 2/Al 2O 3 or Al 2O 3, as well as three types of pellet catalysts V 2O 5-MoO 3-WO 3-Al 2O 3 and V 2O 5-MoO 3-WO 3-TiO 2 were tested for comparison. The experiment results showed that this catalyst had a higher catalytic activity for SCR with comparison to others. The results of characterization showed, the preparation method of this catalyst can give rise to a higher Brunauer,Emmett,Teller (BET) surface area and pore volume, which was strongly related with the highly active performance of this catalyst. At the same time, the function of the combined carrier of TiO 2/Al 2O 3 cannot be excluded.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第1期7-13,共7页
Environmental Science
基金
国家自然科学基金项目(29100028)
广东省自然科学基金项目(920111)
广东省重大科技项目(2KB06601S)
