固定床合成气一步合成二甲醚复合催化剂失活现象的研究  

Study on deactivation of hybrid catalyst for dimethyl ether direct synthesis from syngas in a fixed-bed reactor

作　　者：王莉[1] 李扬[1] 艾珍[1] 吴砚会[1] 

机构地区：[1]西南化工研究设计院国家碳一化学工程技术研究中心工业排放气综合利用国家重点实验室,成都610225

出　　处：《天然气化工—C1化学与化工》2009年第4期56-58,共3页Natural Gas Chemical Industry

基　　金："十一.五"国家科技支撑计划;非石油路线制备大宗化学品关键技术开发(2006BAE02B02)

摘　　要：在5MPa,255℃～285℃和空速1500h-1的反应条件下考察了合成气一步合成二甲醚Cu-Zn-Al/HZSM-5复合催化剂的稳定性及失活现象,并采用X射线衍射、热重分析、比表面积分析等方法对新鲜催化剂和使用1250h后的催化剂进行了表征。结果表明,在实验条件下,随着反应时间的延长,催化剂铜晶粒长大,比表面积减小是导致催化剂失活的主要原因。The stability and deactivation behavior of the Cu-Zn-Al/HZSM-5 hybrid catalyst for dimethyl ether direct synthesis from syngas in the fixed-bed reactor were investigated under the reaction conditions of 5 MPa, 255℃ -285℃, and space velocity 1500h-1. The fresh catalyst and the used catalyst after a 1250h run were characterized by XRD, DTG and BET techniques. The results showed that the main causes resulting in the deactivation of the catalyst were the sintering and carbon deposition.

关 键 词：合成气 二甲醚合成 复合催化剂 失活 

分 类 号：O643[理学—物理化学]