CAJ | 학술논문

采用浸渍法制备了一系列用于甲烷选择催化还原( CH4-SCR)氮氧化物的 Co/MOR 催化剂。采用 XRD、BET、TG-MS、H2-TPR、NH3-TPD和NO-TPD等手段对催化剂进行表征,并对其在甲烷选择催化还原氮氧化物反应中的活性进行评价。结果表明,钴物种以Co3 O4尖晶石形态存在于Co/MOR催化剂中；与MOR载体相比,引入钴物种后,催化剂的酸性、氧化还原能力和对NO的吸脱附能力均发生了变化。在甲烷选择催化还原氮氧化物反应中,Co/MOR的催化活性与其氧化还原性能和对NO的吸脱附性能直接相关；其中, Co 负载量为10％的 Co (10)/MOR 催化剂的 CH4-SCR 脱硝活性最好,在330℃下NO的转化率达54.2％。
채용침지법제비료일계렬용우갑완선택최화환원( CH4-SCR)담양화물적 Co/MOR 최화제。채용 XRD、BET、TG-MS、H2-TPR、NH3-TPD화NO-TPD등수단대최화제진행표정,병대기재갑완선택최화환원담양화물반응중적활성진행평개。결과표명,고물충이Co3 O4첨정석형태존재우Co/MOR최화제중；여MOR재체상비,인입고물충후,최화제적산성、양화환원능력화대NO적흡탈부능력균발생료변화。재갑완선택최화환원담양화물반응중,Co/MOR적최화활성여기양화환원성능화대NO적흡탈부성능직접상관；기중, Co 부재량위10％적 Co (10)/MOR 최화제적 CH4-SCR 탈초활성최호,재330℃하NO적전화솔체54.2％。
A series of Co/MOR catalysts were prepared by impregnation method and used in the selective catalytic reduction of nitric oxide with methane ( CH4-SCR) . These catalysts were characterized by XRD, BET, TG-MS, H2-TPR, NH3-TPD and NO-TPD; their performance in the CH4-SCR of NO was investigated. The results showed that cobalt species exist as Co3 O4 spinal in the Co/MOR catalysts;the acidity and redox and NO absorption/desorption ability of the Co/MOR catalysts are changed after the incorporation of cobalt in MOR zeolite, in comparison with pure MOR zeolite. The catalytic performance of Co/MOR is closely related to its redox and NO adsorption/desorption ability, which are dependent on the cobalt loading. The Co ( 10 )/MOR catalyst with a cobalt loading of 10% exhibits high activity in the CH4-SCR of NO; over it the conversion of nitric oxide reaches 54 . 2% at 330℃.