Cu/Ce-Ti-PILC上丙烯选择催化还原NO的研究  

Study on Cu/Ce-Ti-PILC for selective catalytic reduction of NO by propylene

作　　者：文焱炳[1] 董新法[1] 林维明[2] 

机构地区：[1]华南理工大学化工与能源学院,广东广州510640 [2]广州大学能源与催化研究所,广东广州510006

出　　处：《广州大学学报（自然科学版）》2008年第1期53-57,共5页Journal of Guangzhou University:Natural Science Edition

基　　金：广东省科技厅科技计划项目(2003C34501)

摘　　要：采用铈钛共交联剂对蒙脱土进行柱撑,制备铈钛共交联粘土(Ce-Ti-PILC),并以其为载体,制备了应用于C3H6选择还原NO催化剂Cu/Ce-Ti-PILC.考察了(Ce+Ti)/clay比、制备方法、活性组分、Cu含量、催化剂焙烧温度等对催化剂性能的影响,并用比表面、N2吸附/脱附等温线、XRD、孔径分布及TPR等表征方法对载体和催化剂进行表征.结果表明,(Ce+Ti)/clay比为15 mmol.g-1,采用浸渍法,活性组分Cu负载量为3(wt)%,催化剂焙烧温度为500℃,空速25 000 h-1时,Cu/Ce-Ti-PILC在250℃使NO转化率达到最大值71.21%.In this paper, Na-montmorillnoite was pillared by oligomeric hydroxyl cerium and titanium cations to synthesize Ce-Ti co-pillared interlayered clay （Ce-Ti-PILC）. Cu/ Ce-Ti-PILC catalysts were prepared by defferent （Ce ＋ Ti）/clay, preparation methods, loading metals, calcination temperature and applied to selective catalytic reduction of NO by propylene. The influence of preparation parameters on catalytic properties of Cu/ Ce-Ti-PILC catalysts was investigated, and Ce-Ti-PILC and whose catalysts were characterized by means of BET, N2 adsorption/desorption isotherms, XRD, pore size distribution and TPR. The results showed that the maximum conversion of NO obtained 71.21% at space velocity 25 000 h^-1. The most suitable （Ce ＋ Ti）/clay ratio, preparation method, loading metal, Cu loading, calcination temperature were 15 mmol· g^-1, impregnating method, 3 （wt）% Cu, 500℃.

关 键 词：Cu/Ce—Ti—PILC 丙烯 选择性 还原 

分 类 号：O643[理学—物理化学] X7[理学—化学]