【摘要】 采用Na OH溶液处理法制备了介孔ZSM-5分子筛。采用包埋法合成了ZSM-5/SAPO-34复合介孔分子筛,并采用X射线衍射图谱(XRD)、电子扫描电镜(SEM)、氮吸附进行分析,在固定床反应器中进行了甲醇芳构化反应。研究结果表明,ZSM-5/SAPO-34复合分子筛孔径呈微孔和介孔多级孔分布,孔径和孔容均高于ZSM-5分子筛。当ZSM-5与SAPO-34分子筛的质量比为1∶2时,ZSM-5/SAPO-34复合分子筛具有较好的芳构化活性。在反应温度为475℃、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30.8%。更多还原

【Abstract】 ZSM-5 Mesoporous molecular sieve were prepared by Na OH solution to alkali treatment of ZSM-5 molecular sieve,ZSM-5/SAPO-34 mesoporous composite molecular sieves were prepared by embedding method.The samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM) and N2 sorption.Methanol aromatization reaction were accomplished in fixed bed reactor.The results showed that the pore diameter of ZSM-5/SAPO-34 is a multistage aperture of microporous and mesoporous,the pore size and pore volume is higher than the ZSM-5 molecular sieve.When ZSM-5 and SAPO-34 molecular sieve ’s mass ratio is 1 ∶ 2,the ZSM-5/SAPO-34 mesoporous composite molecular sieves has better aromatization activity.In reaction temperature 475 ℃,pressure is 0.5 MPa,air speed(LHSV) 1.2 h-1,under the condition of BTX(benzene,toluene and xylene) and the yield can reach30.8%.更多还原