高校化学工程学报2011，Vol.25Issue(3)：453-458,6.
SAPO-11/HZSM-5对乙醇脱水制乙烯反应的催化性能
Catalytic Properties of SAPO-11/HZSM-5 for Ethanol Dehydration to Ethylene
摘要
Abstract
Catalytic performance of the mixed catalysts (SAPO-1 1/HZSM-5) used for ethanol dehydration to ethylene was studied, and the effects of dehydration conditions were investigated. The catalytic performances of HZSM-5, SAPO-11 and SAPO-1 1/HZSM-5 for ethanol dehydration to ethylene were compared, and the effects of the surface acidic amount and strength of above three catalysts on the production compositions were analyzed.Results show that, when using SAPO-1 1/H-ZSM-5, the optimum conditions for ethanol dehydration to ethylene are pressure 0.1 MPa, reaction temperature 240j℃, space velocity 1.2 h-1 and concentration of ethanol feeding 99.7％(wt). Under above conditions, the ethanol conversion ratio and the selectivity for ethylene can reach 99.19％ and 98.77％, respectively, and the content of ethylene is 98.92％ in gas production. Meanwhile, the contents of C3 and C4 are 0.37％ and 0.40％, respectively, and there are no other high hydrocarbons. Using SAPO-1 1/HZSM-5, the ethanol dehydration temperature is 60℃ lower than that of HZSM-5 and SAPO-11. It was found that improving the surface weak acidic amount and strength with feasible surface strong acidic strength is propitious to increase the reaction performance and selectivity for ethylene of the catalysts.关键词
乙醇/乙烯/SAPO-11/HZSM-5/催化Key words
ethanol/ ethylene/ SAPO-11/ HZSM-5/ catalysis分类
化学化工引用本文复制引用
周珽,史晓星,武丽娜,王海燕,胡燚,黄和..SAPO-11/HZSM-5对乙醇脱水制乙烯反应的催化性能[J].高校化学工程学报,2011,25(3):453-458,6.基金项目
国家"863"项目(2006AA020101). （2006AA020101）
