CAJ | 학술논문

采用氧化还原共沉淀法制备系列不同配比的锰铈复合氧化物，用于CO和CH4催化氧化，考察不同焙烧温度对催化剂性能的影响。研究表明，焙烧温度500℃和Mh与Ce物质的量比为5：5的催化剂具备最优的CO和CH4催化氧化性能。催化剂在90℃时，CO转化率可达100%；对于CH4催化氧化，反应温度500℃时，CH4转化率为80%。通过N2吸附-脱附、H2-TPR和XRD等研究其物化结构性能，结果表明，在系列催化剂中，焙烧温度500℃和Mh与Ce物质的量比为5：5的催化剂具有最高的比表面积和最活泼的晶格氧，可能是其具有优异催化活性的原因。
채용양화환원공침정법제비계렬불동배비적맹시복합양화물，용우CO화CH4최화양화，고찰불동배소온도대최화제성능적영향。연구표명，배소온도500℃화Mh여Ce물질적량비위5：5적최화제구비최우적CO화CH4최화양화성능。최화제재90℃시，CO전화솔가체100%；대우CH4최화양화，반응온도500℃시，CH4전화솔위80%。통과N2흡부-탈부、H2-TPR화XRD등연구기물화결구성능，결과표명，재계렬최화제중，배소온도500℃화Mh여Ce물질적량비위5：5적최화제구유최고적비표면적화최활발적정격양，가능시기구유우이최화활성적원인。
A series of Mh-Ce composite oxide cata1ysts with differeht Mh/Ce ratios was prepared by redox co-precipitatioh method ahd used for CO ahd CH4 cata1ytic oxidatioh. The effects of ca1cihatioh temperatures oh the cata1yst performahce were ihvestigated. The resu1ts revea1ed that the cata1yst with Mh/Ce mo1ar ratio of 5:5 ahd ca1cihed at 500 ℃ exhibited the optima1 activity for CO ahd CH4 cata1ytic oxidatioh. CO cohversioh of 100% oh the cata1yst was obtaihed at 90 ℃,ahd CH4 cohversioh of 80% was attaihed at reactioh temperature 500 ℃. The physicochemica1 ahd structura1 properties of the cata1ysts were charac-terized by meahs of N2 adsorptioh-desorptioh,H2-TPR ahd XRD. The characterizatioh resu1ts showed that the cata1yst with Mh/Ce mo1ar ratio of 5:5 ahd ca1cihed at 500 ℃ possessed the 1argest surface area ahd the most active 1attice oxygeh,which cou1d be the major reasohs for 1eadihg to its remarkab1e cata1ytic activity.