The Preparation And Characterization Of Arranged Zeolite ZSM-5 And ZSM-35 Catalysts

The exploration and development of arranged catalytic materials were crucial to meet the new requirements arose in chemical engineering field such as process intensification (PI), catalysis distillation integration, etc. Furthermore, most of the initial zeolite products were powder and need to be molded with binders before employment, which would reduce the content of zeolite in unit volume, debase the catalytic efficiency etc. The thesis studied the preparation of arranged Zeolitic catalytic materials from three aspects with different substrate and synthesis techniques.Firstly, we found the zeolite seed could improve the mechanical properties in vapor phase system for the first time. And we investigated in the system which employed aluminosilicate spheres (SiO2/Al2O3=55.86),water, zeolite ZSM-5 seed etc. as solid phase, ethyldiamine(EDA),water, propylamine etc. as liquid phase, at thetemperature ranged from 453K to 493K and crystallized in 240hours to prepare arranged ZSM-5 catalyst whose mechanical strength (MS) could reach 3.5x106Pa; and we still found the ammonia addition in liquid phase would improve the MS greatly. For Zeolite ZSM-35 and Beta this seed effect also occurred. This technique could be a new route to synthesize arranged zeolitic materials without binder.Secondly, in the weak basic system consisted of EDA and water we employed porous aluminosilicate sinter as substrate at 493K crystallized for 288 hours to prepare arranged ZSM-35 catalytic material, while the strong basic system with inorganic alkali addition would seriously destroy the configuration of the product. Moreover, we find other two new templating agents for zeolite ZSM-35 synthesis-ethanolamine (EtOHNH2) andN-butanlyamine(ButNH2). The results also indicated that the MS of the sinter before and after transformation increased four times to1.8x10 Pa, while the Vikers micro-hardness increased from 569 to 600.Lastly, in the vapor phase system, we employed boron glass and common glass as substrate to transform into zeolite membranes. When the temperature varied from 453 to 493K with EDA and wateras liquid phase and when the molar ratio was located in 6.5-2.4 and 0.4-0.3 the zeolite ZSM-5 and ZSM-35 membranes were prepared respectively. Moreover, we detailedly analyzed the influence of crystallization time, temperature and different templating agents. The joint situation of the films with the substrate after calcinations at 823K for 6 hours and water vapor treatments at 493K for 72 hours were investigated. The results indicated that the membranes connected the substrate firmly and probably could apply for catalysis distillation integration or in others potential areas.