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载体特性对Pd-Cu/TiO2催化剂催化脱氮性能的影响
INFLUENCE OF SUPPORT PROPERTIES ON CAPABILITY OF Pd-Cu/TiO2 FOR CATALYTIC DENITRIFICATION
【摘要】 以Pd-Cu/TiO2为催化剂,采用催化加氢技术进行脱氮研究.结果表明:TiO2载体的特性对催化活性及N2选择性有显著影响,与773K和973K温度下焙烧得到的载体相比,以573K温度下焙烧得到的TiO2为载体制备的Pd(5wt%)-Cu(1·25wt%)/TiO2催化剂可显著提高催化效率及N2选择性.
【Abstract】 In this study, catalytic hydrogenation using Pd-Cu/TiO2 as the catalyst w as adopted to remedy the simulated groundwater which was polluted by nitrate. Re sults showed that the properties of TiO2 support markedly influenced the catalytic activity and N2 selectivity of Pd-Cu/TiO2 catalyst. Pd (5wt%)-Cu(1.25wt%)/TiO 2 with TiO2 calcined at 573K as the support showed an enhanced activity and N2 selectivity compared with those with TiO2 calcined at 773K and 973K.
【关键词】 硝酸盐;
催化剂;
脱氮;
活性;
选择性;
【Key words】 nitrate pollution; catalysts; denitrification; activ ity; selectivity.;
【Key words】 nitrate pollution; catalysts; denitrification; activ ity; selectivity.;
【基金】 国家科技攻关项目(2003BA808A17-03专题)资助.
- 【文献出处】 环境化学 ,Environmental Chemistry , 编辑部邮箱 ,2005年05期
- 【分类号】X703
- 【被引频次】4
- 【下载频次】199