The development of improved zeolite materials for applications in separation and catalysis requires understanding mass transport. Herein, diffusion single molecules is tracked the straight sinusoidal channels industrially relevant ZSM-5 zeolites using a combination single-molecule localization microscopy uniformly oriented thin films. Distinct motion behaviors are observed with same geometry, s...

mfi-type zeolite membranes (zsm-5) were prepared on α-alumina tubular supports and tested for separation of h2/co mixtures. the effect of pressure and temperature on h2 and co flows and selectivity was investigated. the best results in this work were obtained with a zsm-5 membrane prepared over a porous α-alumina tube seeded with zeolite nanocrystals synthesized with microwave technique. in thi...

ZSM-5 zeolite was rapidly synthesized in system containing ethylenediamine from the initial gel: (5-8) Na(2)O: 44 EDA:Al(2)O(3):100 SiO(2):4000 H(2)O. The crystals were lath-shaped. The effect of pretreatment and alkalinity on crystallinity was investigated. The pretreatment of silicate source can cut down the crystallization time. Tuning the system alkalinity and controlling crystallization ti...

The precise pore sizes defined by crystalline zeolite lattices have led to intensive research on zeolite membranes. Unfortunately, zeolites have been extremely difficult to prepare in a defect-free thin film form needed for membrane flux and selectivity. We introduced tetrapropylammonium (TPA), a structure-directing agent for zeolite ZSM-5, into a silica sol and exploit the development of high ...

A ZSM-5 molecular sieve composite with a wide pore prepared by the solid phase in-situ synthesis method and fluid catalytic cracking, an FCC catalyst additive same for increasing amount of light olefin yield were investigated. The samples characterized XRD, N2 adsorption/desorption, SEM, NH3-TPD, respectively. results showed that structure was pure MFI-type zeolite material. crystallinity 59.8 ...

The inner heterogeneity of ZSM-5 zeolite and the building mechanism architecture in synthesis was revealed through NH4F-etching. described by concepts defect-zoning Al-zoning.