复合固体酸催化剂在合成气制二甲醚中的应用研究  

Applications of composite solid acid catalysts in direct preparation of dimethyl ether from syngas

作　　者：郝治富[1] 张海燕[1] 吴玮[1] 宁英男[1] 毛国梁[1] 

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《化工科技》2011年第4期23-26,共4页Science & Technology in Chemical Industry

基　　金：大庆市科学技术计划项目(SGG2007-39)

摘　　要：对镁碱沸石(FER)进行Zn、Mn金属改性,对γ-Al2O3进行S2O82-、Ni2+改性,将改性后的FER和γ-Al2O3复合用于合成气直接制二甲醚催化剂中,作为甲醇脱水催化剂组分,制备出了Cu-Zn-Al/ASN/FZM双功能催化剂。在连续固定床高压反应器中,研究了改性条件、复合比及反应温度对催化剂性能的影响。在240℃、3.2 MPa、1 500 h-1空速和n(H2)∶n(CO)=2的反应条件下,CO的转化率为80%,二甲醚选择性为75%,催化剂性能好于改性的FER和γ-Al2O3单独使用时的效果。Ferrierite（FER） was modified with Zn,Mn while γ-Al2O3 was modified with S2O2-8 and Ni2＋.The composite of modified FER and γ-Al2O3 was used as the dehydrating agent to prepare the Cu-Zn-Al/ASN/FZM bifunctional catalyst for the direct preparation of dimethyl ether from syngas.Effects of modification conditions,composite ratio and reaction temperature on the performance of the catalysts were studied in a continuous high pressure fixed bed reactor.The best catalytic performance was archived at 240℃,3.2MPa,1500h-1 while the molar ratio of H2/CO was 2.80% conversion of CO and 75% selectivity toward dimethyl ether were thus obtained.The catalytic performance of the composite catalyst is better than that when the modified FER or γ-Al2O3 was solely used.

关 键 词：合成气 二甲醚 镁碱沸石 Γ-AL2O3 

分 类 号：TQ223.2[化学工程—有机化工]