含氮多孔碳材料的制备及其对乙炔氢氯化反应催化性能研究  

Preparation of nitrogen-containing porous carbon materials and its catalytic properties for acetylene hydrochlorination

作　　者：谢永刚 陶萱 陈方永 王雪枫 李娟娟[1] 高歌[1] XIE Yong-gang;TAO Xuan;CHEN Fang-yong;WANG Xue-feng;LI Juan-juan;GAO Ge(Key Laboratory of Oil&Gas Fine Chemicals of Ministry of Education,College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学化学化工学院,石油天然气精细化工教育部重点实验室,新疆乌鲁木齐830046

出　　处：《现代化工》2020年第10期155-159,164,共6页Modern Chemical Industry

基　　金：新疆中泰化学股份有限公司横向项目(21GL1210-316);自治区自然科学基金(2015211C254)。

摘　　要：以聚苯胺(Polyaniline,PANI)为前驱体,高温焙烧制备含氮多孔碳材料催化剂,并以固定床反应器对催化剂进行乙炔氢氯化催化性能研究。结果表明,聚苯胺在900℃下焙烧3 h所得催化剂活性最优,在优化的反应条件下,乙炔转化率高达41.42%,而相同乙炔空速下,汞催化剂的乙炔转化率最高为41.60%,催化效果相差无几。BET、XPS、SEM和TG表征结果表明,该催化剂拥有丰富的比表面积和高含氮量,以石墨氮(Graphitic N)为主要活性位点,氮含量与氮官能团十分稳定,不随反应的进行而改变,催化剂失活的主要原因是积炭。Nitrogen-containing porous carbon catalysts are obtained through high temperature calcination by using polyaniline(PANI)as precursor.The catalysts'performance for hydrochlorination of acetylene is evaluated in a fixed bed reactor.Evaluation results show that the catalysts that are made by calcining PAN at 900℃for 3 h show the best catalytic activity.Under optimized reaction conditions,the conversion of acetylene can reach as high as 41.42%over the prepared catalysts while the highest conversion of acetylene is 41.60%over industrial low-mercury catalyst under the same velocity of acetylene.Characterization through BET,XPS,SEM and TG shows that the catalysts have abundant specific surface area and high nitrogen content.Conclusion is drawn that abundant specific surface area(especial micro-pore)and high nitrogen content is helpful to the hydrochlorination of acetylene,graphitic N is the main active site,and the amount of nitrogen and nitrogen-containing functional groups within the catalysts keep constant during the hydrochlorination.Carbon deposition contributes to the deactivation of catalyst.

关 键 词：乙炔氢氯化 氯乙烯 聚苯胺 含氮多孔碳材料 氮官能团 

分 类 号：TQ426.68[化学工程]