乙炔氢氯化无汞催化剂单管试验效果及表面积炭结构研究  

Structural characterization of coke deposited on single-tube with mercury-free catalyst for acetylene hydrochlorination reaction

作　　者：曾军建 赵基钢[1] 王雷[1,2] 杨恒华[2] 沈本贤[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]天津大沽化工股份有限公司,天津300455

出　　处：《现代化工》2016年第2期72-76,共5页Modern Chemical Industry

摘　　要：采用自研的AuCl_3-CuCl_2双金属无汞催化剂,在中试单管反应器中考察了乙炔氢氯化反应效果。结果表明:氯化烯的选择率均在99%以上,初始乙炔转化率>98%;随着反应的进行,乙炔转化率缓慢下降,当反应1 600 h后,乙炔转化率降至89%。通过反应前后无汞催化剂的对比表征结果表明,乙炔氢氯化反应活性下降是由催化剂表面的芳环结构积炭导致的。同时,结合积炭的形成机理对提高无汞催化剂催化稳定性进行了分析。An Au-based bimetallic catalyst is prepared. The catalytic activity is evaluated in a single-tube reactor for acetylene hydrochlorination. The results show that the selectivity to vinyl chloride is above 99% with an initial acetylene conversion of 98%. As the reaction continues, catalytic activity starts to decline and has a final acetylene conversion of 89% after 1600 hours＇ reaction. The deactivation of catalyst is attributed to the coke and coke deposits with aromatic structures. Based on the mechanism of coke formation ,the improvement of catalytic stability is also analyzed.

关 键 词：乙炔氢氯化 催化剂失活 积炭 机理 

分 类 号：TQ426[化学工程]