SAPO-34/ZSM-5复合分子筛的制备及其催化甲醇芳构化性能研究  

Preparation of SAPO-34/ZSM-5 composite zeolite and its performance in methanol aromatization reaction

作　　者：于跃[1] 张玲[1] 魏民[1] 王海彦[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001

出　　处：《应用化工》2015年第3期434-437,441,共5页Applied Chemical Industry

基　　金：辽宁省自然科学基金(201202126)

摘　　要：先用水热合成法制备SAPO-34分子筛。再用机械混合法制备了SAPO-34/ZSM-5复合分子筛,借助X射线衍射(XRD)、N2吸附-脱附、扫描电镜(SEM)、NH3程序升温脱附(NH3-TPD)、傅里叶变换红外光谱(FTIR)和程序升温氧化(TPO)等手段对其进行了表征。结果表明,SAPO-34/ZSM-5复合分子筛的孔径呈介微孔结构,其比表面积、孔容、弱酸、强酸量均高于ZSM-5和SAPO-34分子筛,并且其反应稳定性优于ZSM-5分子筛。最后,将SAPO-34/ZSM-5复合分子筛用于甲醇芳构化反应,结果表明,在反应温度为460℃、反应压力0.5 MPa、空速(LHSV)1.2 h-1条件下,BTX(苯、甲苯和二甲苯)的收率可达30.5%。Firstly,SAPO-34 zeolite was hyrothermally synthesized. Then SAPO-34 / ZSM-5 composite zeolite was synthesized by mechanical mixing method. The synthesized samples were characterized by XRD,N2adsorption-desorption,SEM,NH3-TPD,FTIR and TPO. The results show that the pore diameter of SAPO-34 / ZSM-5 is a aperture of mesoporous and microporous,the specific surface area,the pore volume,the amount of strong acid and weak acid are higher than the ZSM-5 and SAPO-34 zeolite,the reaction stability of SAPO-34 / ZSM-5 zeolite is better than ZSM-5 zeolite. In addition,the catalytic performance of catalysts for the aromatization of methanol were studied. The results showed that in reaction temperature 460 ℃,pressure is 0. 5 MPa,airspeed（ LHSV） 1. 2 h- 1,under the condition of BTX（ benzene,toluene and xylene） and the yield can reach 30. 5%.

关 键 词：SAPO-34/ZSM-5复合分子筛 机械混合法 甲醇芳构化 

分 类 号：TQ426.95[化学工程]