当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2015年
6期
1249-1252
,共4页
方礼理%刘春红%程杰%万克柔%林涛
方禮理%劉春紅%程傑%萬剋柔%林濤
방례리%류춘홍%정걸%만극유%림도
共沉淀法%载体%催化剂活性
共沉澱法%載體%催化劑活性
공침정법%재체%최화제활성
Co-precipitation method%Catalyst carriers%Methyl acetate
采用共沉淀法制备改性的 Cu-Zn 酯加氢催化剂，在固定床反应器上以醋酸甲酯为原料考查四种载体（Al、Cr、Zr、Si）对其性能的影响，并对其进行 BET、XRD 等表征处理，结果表明，以 Al2O3为载体的催化剂加氢性能最佳，醋酸甲酯转化率为95.56%，乙醇的选择性为91.57%。醋酸甲酯加氢反应活性受催化剂酸性强弱影响，酸性较强反应活性较强，活性组分 Cu 在载体表面的分散状况对反应的加氢深度有一定影响。
採用共沉澱法製備改性的 Cu-Zn 酯加氫催化劑，在固定床反應器上以醋痠甲酯為原料攷查四種載體（Al、Cr、Zr、Si）對其性能的影響，併對其進行 BET、XRD 等錶徵處理，結果錶明，以 Al2O3為載體的催化劑加氫性能最佳，醋痠甲酯轉化率為95.56%，乙醇的選擇性為91.57%。醋痠甲酯加氫反應活性受催化劑痠性彊弱影響，痠性較彊反應活性較彊，活性組分 Cu 在載體錶麵的分散狀況對反應的加氫深度有一定影響。
채용공침정법제비개성적 Cu-Zn 지가경최화제，재고정상반응기상이작산갑지위원료고사사충재체（Al、Cr、Zr、Si）대기성능적영향，병대기진행 BET、XRD 등표정처리，결과표명，이 Al2O3위재체적최화제가경성능최가，작산갑지전화솔위95.56%，을순적선택성위91.57%。작산갑지가경반응활성수최화제산성강약영향，산성교강반응활성교강，활성조분 Cu 재재체표면적분산상황대반응적가경심도유일정영향。
Surface promoters-modified Cu-Zn catalysts were prepared by a coprecipitation-post impregnation method and evaluated in a fixed bed reactor. The effect of Al,Cr,Zr and Si as catalyst carriers on the catalytic performance was investigated, and the Cu-Zn catalysts were characterized by BET,XRD and so on. The results show that the catalyst with aluminium oxide as the carrier exhibits the highest methyl acetate conversion 95.56% and ethyl alcohol selectivity 91.57%; the acidity of catalysts can affect the distribution of products,while the dispersion of Cu can affect the degree of hydrogenation.
