CAJ | 학술논문

采用浸渍法制备Au-Cu-K三组元无汞催化剂，在中试单管固定床反应器中考察了Au-Cu-K催化剂用于乙炔氢氯化反应制取氯乙烯的催化效能，并采用微结构分析仪、扫描电镜、透射电镜、红外光谱、电感耦合等离子体发射光谱等对反应前后的无汞催化剂进行了对比分析表征。结果表明，Au-Cu-K 催化剂在反应温度170℃、常压、空速20h-1、v(HCl)∶v(C2H2)=1.1的条件下，乙炔转化率从初始的98%缓慢下降到1600h后的89%，氯乙烯选择性在整个反应期间始终大于99%；Au-Cu-K无汞催化剂的活性下降主要是表面生成了类聚乙烯化合物。
채용침지법제비Au-Cu-K삼조원무홍최화제，재중시단관고정상반응기중고찰료Au-Cu-K최화제용우을결경록화반응제취록을희적최화효능，병채용미결구분석의、소묘전경、투사전경、홍외광보、전감우합등리자체발사광보등대반응전후적무홍최화제진행료대비분석표정。결과표명，Au-Cu-K 최화제재반응온도170℃、상압、공속20h-1、v(HCl)∶v(C2H2)=1.1적조건하，을결전화솔종초시적98%완만하강도1600h후적89%，록을희선택성재정개반응기간시종대우99%；Au-Cu-K무홍최화제적활성하강주요시표면생성료류취을희화합물。
Au-Cu-K mercury-free catalyst was prepared by impregnation. Activity evaluation of Au-Cu-K mercury-free catalyst for acetylene hydrochlorination was conducted in a single pipe reactor. The structures of fresh and used catalysts were characterized with BET,SEM,TEM,FT IR and ICP-AES. C2H2 conversion on Au-Cu-K mercury-free catalyst reduced slowly from 98%to 89%,and VCM selectivity was more than 99%under reaction conditions of temperature 170℃,space velocity 20h-1 and feed ratio v(HCl)∶v(C2H2)=1.1 in the whole 1600 hours running. The main reason for decrease of catalyst activity was polyethylene-like compounds formed on the surface of catalyst.