燃料化学学报2011，Vol.39Issue(6)：455-459,5.
SO2对Co/MOR催化剂上CH4选择催化还原NO反应性能的影响
Effect of SO2 on the performance of Co/MOR catalyst for the selective catalytic reduction of NO by CH4
摘要
Abstract
The selective catalytic reduction (SCR) of NO by CH4 in the presence of SO2 was investigated over the catalyst cobalt supported on Mordenite (Co/MOR); both the fresh and spent catalysts were characterized by temperature-programmed desorption of NO (NO-TPD) , X-ray diffraction (XRD) , H2 temperature-programmed reduction (H2-TPR), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The results indicated that the presence of SO2 in the feed leads to a decrease of NO conversion at a temperature below 550 ℃; however, this influence is not evident at a temperature above 600 ℃. Moreover, the negative effect of SO2 on the NO conversion is reversible over the Co/MOR catalyst. SO2 may inhibit the adsorption of NO on the active sites and promote the formation of CoO during the reaction, which leads to a decrease of the active sites and the activity of Co/MOR for the SCR of NO.关键词
二氧化硫/一氧化氮/甲烷/选择催化还原/钴/丝光沸石Key words
SO2/ NO/ CH4/ selective catalytic reduction/ cobalt/ mordenite分类
化学引用本文复制引用
闫晓亮,陈树伟,于峰,李瑞丰..SO2对Co/MOR催化剂上CH4选择催化还原NO反应性能的影响[J].燃料化学学报,2011,39(6):455-459,5.基金项目
国家自然科学基金(20876102) （20876102）
高等学校博士学科点专项科研基金(200801120006) （200801120006）
山西省自然科学基金(2008011022)。 （2008011022）
