物理化学学报Issue(6)：1289-1296,8.DOI:10.3866/PKU.WHXB201304162
制备方法对Co-MOR催化剂CH4选择还原NO性能的影响
Effects of Preparation Methods on the Catalytic Performance of Selective Catalytic Reduction of NO with CH4 over Co-MOR Catalysts
摘要
Abstract
A series of Co-mordenite (MOR) catalysts prepared by ion-exchange or impregnation methods were used in the selective catalytic reaction of NO with methane (CH4-SCR). The structure and physicochemical properties of the catalysts were examined by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), UV-Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and temperature-programmed desorption of NO (NO-TPD). The Co species in the catalyst prepared by impregnation is present as Co3O4, whereas in the catalyst prepared by an ion-exchange method, the Co species enter in the mordenite skeleton with the ion form, and the more Co2+ and [Co-O-Co]2+ formed in the catalysts, the more uniform the adsorption of NO centers and the active centers of CH4-SCR. The catalysts prepared by different methods exhibited different activities for CH4-SCR. The catalysts prepared by ion-exchange exhibited activity over a wide activity temperature region, and NO conversion was over 50% at 327-450 °C on the Co(0.30)-MOR catalyst.关键词
Co/丝光沸石/离子交换/CH4/NOKey words
Co/Mordenite/Ion-exchange/CH4/NO分类
化学化工引用本文复制引用
李滨,王虹,丁福臣,李翠清,宋永吉,柯明,任翠涛..制备方法对Co-MOR催化剂CH4选择还原NO性能的影响[J].物理化学学报,2013,(6):1289-1296,8.基金项目
PHR20110517).北京市教委科技计划(KM200910017002)和北京市属高等学校人才强教计划(PHR200907129, PHR20110517)资助项目 （KM200910017002）
