CAJ | 학술논문

以大孔SiO2为载体,醋酸铯为主活性组分,添加氧化锆助剂采用浸渍法制备了Cs-ZrO2/SiO2催化剂,用于以丙酸甲酯( MP)、甲醛为主要原料的甲基丙烯酸甲酯( MMA)合成反应。考察了助剂ZrO2添加及其含量、原料中水含量、反应温度、原料酯醛摩尔比、进料空速等因素对MMA合成反应的影响,并利用ICP、BET表征手段对催化剂失活原因进行了研究。结果表明,水对反应的影响很大,水含量增大会导致产物收率降低；无水条件下,催化剂中ZrO2含量0.5%,丙酸甲酯/甲醛(摩尔比)3∶1,反应温度340℃,空速300 h-1时反应活性最好,MMA选择性可达94%；ICP、BET表征分析表明,催化剂失活的主要原因是催化剂结构被破坏所致。
이대공SiO2위재체,작산색위주활성조분,첨가양화고조제채용침지법제비료Cs-ZrO2/SiO2최화제,용우이병산갑지( MP)、갑철위주요원료적갑기병희산갑지( MMA)합성반응。고찰료조제ZrO2첨가급기함량、원료중수함량、반응온도、원료지철마이비、진료공속등인소대MMA합성반응적영향,병이용ICP、BET표정수단대최화제실활원인진행료연구。결과표명,수대반응적영향흔대,수함량증대회도치산물수솔강저；무수조건하,최화제중ZrO2함량0.5%,병산갑지/갑철(마이비)3∶1,반응온도340℃,공속300 h-1시반응활성최호,MMA선택성가체94%；ICP、BET표정분석표명,최화제실활적주요원인시최화제결구피파배소치。
Cs-ZrO2/SiO2 catalyst was prepared by impregnation method with macroporous SiO2 as the car-rier,cesium carbonate as the main active component,and ZrO2 as the additives. The catalyst was used for the synthesis of methyl methacrylate (MMA). In this reaction,methyl propionate (MP),and formalde-hyde was the main raw materials. The effects of adding ZrO2 and its content,water content,reaction tem-perature,molar ratio of ester and aldehyde,and space velocity on the synthesis of MMA were investigated, the ICP,BET characterization methods were used to study the deactivation reason. The results showed that the influence of water on the reaction was great,water content increased would lead to reduce the product yield;it also showed that the reaction activity was best,and the selectivity of MMA reached 94%,under the conditions as follows: anhydrous,the content of ZrO2 in the catalyst was 0. 5%,methyl propionate/formaldehyde (molar ratio) was 3∶1,reaction temperature was 340 ℃,space velocity was 300 h-1;ICP, BET characterization analysis showed that the catalyst deactivation was mainly caused by destruction of the catalyst structure.