串联催化剂在二甲醚与合成气制备乙醇反应中的性能研究  

Research of ethanol synthesis from dimethyl ether and syngas on tandem catalyst

作　　者：吕鹏[1] 徐钉[1] 申东明[1] 钟涛[1] 吕成学[1] 刘赫扬[1] 椿范立[1] 杨瑞芹[1] 

机构地区：[1]浙江省农产品化学与生物加工技术重点实验室,浙江科技学院生物与化学工程学院,浙江杭州310023

出　　处：《应用化工》2017年第7期1285-1289,共5页Applied Chemical Industry

基　　金：国家自然科学基金(21528302,21306177);浙江省自然科学基金青年基金(LQ16B060002);浙江省自然科学基金(LY14B030004);国家级大学生创新创业训练计划项目(201611057013)

摘　　要：通过水热合成法和共沉淀法分别制备了分子筛催化剂和Cu/ZnO催化剂,将分子筛与Cu/ZnO调控成双层串联催化剂,并用于二甲醚与合成气通过两段反应制备乙醇。研究了反应温度和反应气组成等因素对反应的影响,比较了分子筛类型、助剂种类和含量等对催化剂活性的影响。结果表明,随反应温度增加,DME转化率和乙醇选择性呈现先增加后减小趋势,随着DME含量减少和CO含量增加,DME转化率和乙醇选择性增加。H-MOR分子筛与Cu/ZnO串联催化剂显示了最佳的催化活性;金属助剂能提高催化剂活性,尤其是含5%Cu的Cu/H-MOR与Cu/ZnO串联催化剂显示了最佳的催化反应活性,于最佳反应温度493 K下以Ar/DME/CO/H_2(1.6/1.0/47.4/50.0)为原料进行反应,DME转化率达到33.6%,乙醇选择性达到了44.5%。Zeolite and Cu/ZnO catalyst were synthesized by hydrothermal synthesis method and co-precipitation method respectively. Ethanol synthesis in a dual bed reactor with dimethyl ether and syngas was realized on the tandem catalyst. Reaction temperature,feed gas content,zeolite type and promoter metal composition conditions were optimized. At the optimal reaction temperature,DME conversion and ethanol selectivity increased with CO/DME ratio increasing. H-MOR zeolite and Cu/ZnO catalyst showed the best catalytic activity,metal promoter of 5% Cu improved the catalytic activity obviously. DME conversion reached 33. 6% with ethanol selectivity of 44.5% at reaction temperature of 493 K and feed gas content of Ar/DME/CO/H2= 1.6/1.0/47.4/50.0.

关 键 词：串联催化剂 二甲醚 合成气 乙醇 分子筛 

分 类 号：TQ426[化学工程] O643.3[理学—物理化学]