碱土金属改性HZSM-5催化乙醇脱水制乙烯的反应研究  

Study on dehydration of ethanol to ethylene catalyzed by alkaline-earth metal modified HZSM-5

作　　者：黄鑫江[1] 胡耀池[1] 李恒[1] 黄和[1] 胡燚[1] 

机构地区：[1]南京工业大学制药与生命科学学院,江苏南京210009

出　　处：《化学试剂》2007年第12期705-707,共3页Chemical Reagents

基　　金：国家科技支撑计划重点项目(2006BAE02B04);中石化科研开发项目(205085)

摘　　要：考察了碱土金属镁、钙、钡和锶浸渍改性的固体酸性催化剂HZSM-5分子筛在乙醇脱水制乙烯反应中的催化性能,发现锶改性HZSM-5催化效果最佳,然后在此基础上对反应条件进行了优化实验。结果表明0.5%Sr/HZSM-5的催化性能最好,在220℃、质量空速2.5 h-1、乙醇浓度50%的反应条件下,乙醇的转化率为99.3%,乙烯的选择性高达99.3%。The catalytic performance of HZSM-5 modified by alkaline-earth metals Mg, Ca, Ba and Sr, respectively, was investigated in the dehydration reaction of ethanol to ethylene, and the Sr/HZSM-5 showed the best catalytic effect. Then the optimal reaction conditions were obtained through experiments. When catalyzed by 0.5 % Sr/HZSM-5 at 220℃,with WHSV and ethanol concentration specified at 2.5 h^-1 and 50%, respectively, the conversion rate could reach 99.3% with the ethylene selectivity equating to 99.3 %.

关 键 词：碱土金属 乙醇 脱水 乙烯 HZSM-5 

分 类 号：O643.3[理学—物理化学]