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作 者:王文进[1] 方奕文[1] 宋一兵[1] 郭锐华[1] 黄晓昌[1] 乔晓辉[1]
出 处:《天然气化工—C1化学与化工》2008年第1期6-8,13,共4页Natural Gas Chemical Industry
基 金:广东省自然科学基金资助项目(06027205)
摘 要:考察了几种酸性分子筛MCM-41、SAPO-34、ZSM-5和MCM-22上二甲醚的低温水解反应性能。结果发现,分子筛的种类和硅铝比均影响着催化剂上二甲醚水解反应的催化活性,其顺序为:MCM-41<<SAPO-34<HZSM-5(n(Si)/n(Al)=25)<HZSM-5(n(Si)/n(Al)=19)<HZSM-5(n(Si)/n(Al)=13)<MCM-22(n(Si)/n(Al)=13)。150℃时,MCM-22(n(Si)/n(Al)=13)催化水解反应的甲醇收率为9.69mmol.g-1.h-1,水的转化率为36.11%。The activities of a series of acid zeolite, MCM-41, SAPO-34, ZSM-5 and MCM-22, for low-temperature hydrolysis of dimethyl ether (DME) were investigated. It wad found that the activities of the catalysts for DME hydrolysis to methanol were relative to their type and Si/Al ratio, and the sequence of activity was as follow : MCM-41 〈 〈 SAPO-34 〈 HZSM-5 (n(Si)/n(Al) =25) 〈 HZSM-5(n(Si)/n(Al) =19) 〈 HZSM-5 (n (Si)/n(Al) =13) 〈 MCM-22 (n(Si)/n(Al) = 13). Methanol space-time yield of 9.69 mmol. g^-1. h^-1, and water conversion of 36.11% were obtained at 150℃ for the MCM-22 (n(Si)/n(Al) = 13 ) catalyst.
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