CAJ | 학술논문

用溶胶凝胶法制备稀土复合固体酸催化剂SO42_/TiO2/Ce4+，将其用于棕榈酸与甲醇的加压酯化反应。考察了不同制备条件对催化剂性能的影响，并对其结构进行表征。结果表明，在Ce4+浓度0.05 mol/L、H2 SO4浓度1.38 mol/L、煅烧温度450℃和煅烧时间3 h的制备条件下，催化剂活性最高。棕榈酸与甲醇的加压酯化反应最佳工艺条件为：醇酸物质的量之比10：1、反应温度110℃、反应时间30 min、催化剂用量3％，此时转化率可达到96.33％。催化剂在重复使用4次后，转化率仍在50％以上。
용용효응효법제비희토복합고체산최화제SO42_/TiO2/Ce4+，장기용우종려산여갑순적가압지화반응。고찰료불동제비조건대최화제성능적영향，병대기결구진행표정。결과표명，재Ce4+농도0.05 mol/L、H2 SO4농도1.38 mol/L、단소온도450℃화단소시간3 h적제비조건하，최화제활성최고。종려산여갑순적가압지화반응최가공예조건위：순산물질적량지비10：1、반응온도110℃、반응시간30 min、최화제용량3％，차시전화솔가체도96.33％。최화제재중복사용4차후，전화솔잉재50％이상。
Solid acid catalyst modified with rare earth,SO4 2_/TiO2/Ce4+,was prepared by sol-gel method and used for the esterification of palmitic acid and methanol. The effects of different preparation conditions on the catalyst activity were investigated,and its structure was characterized. The results indicated that the highest catalyst activity was exhibited when Ce4+concentration 0. 05 mol/L,H2 SO4 concentration 1. 38 mol/L,calcination temperature 450℃ and calcination time 3 h. It was found that the optimum condition were molar ratio of methanol to palmic acid 10:1,reaction temperature 110℃,reaction time 30 min and catalyst amount 3%,respectively. The conversion of palmitic acid was 96. 33% under these conditions. The conversion rate was still above 50% when the catalysts were reused for four times.