the process of ethylene production from ethane dehydrogenation is one of the interesting processes in the field of conversion the petroleum light gases to the valuable products. in this process, the outlet gaseous product is a combination of ethylene, ethane and hydrogen. effective separation techniques are required for separation of ethylene from unreacted ethane. here a new adsorbent approach...

The commercial SAPO-34 zeolite with 0.38 nm pore size and ZIF-8 particles 0.34 aperture were separately dispersed into different polymer matrix, to prepare the mixed matrix membranes (MMMs) for gas separation. situation of in influence fillers on separation performance membrane had been investigated this study. as-synthesized MMMs showed a better trade-off between permeability selectivity than ...

SAPO-56 crystals were synthesized via microwave heating. The resultant crystals displayed high catalytic activity in the synthesis of chloropropene carbonate from CO2 and epichlorohydrin. The enhanced catalytic activity of SAPO-56 crystals was related to their high CO2 adsorption capacity, small crystal size, and the presence of acid sites.

Substituting metals for either aluminum or phosphorus in crystalline, microporous aluminophosphates creates Brønsted acid sites, which are well known to catalyze several key reactions, including the methanol to hydrocarbons (MTH) reaction. In this work, we synthesized a series of metal-substituted aluminophosphates with AFI topology that differed primarily in their acid strength and that spanne...

an account is presented on investigation of the effects of synthesis parameters, i.e., reaction sources, silica to alumina ratio, acid molar ratio and crystallization conditions on the crystallinity, morphology and particle size of sapo-34. the synthesis conditions were designed to produce small particles with narrow size range. the prepared samples were characterized by xrd and sem techniques ...

Fabrication of hierarchical porosity in microporous zeolites is a key to overcoming the inherent mass-transfer limitation and improving molecular accessibility active sites. The present study reports facile cost-effective etching strategy based on crystal metastability construct SAPO-34 (CHA-type) zeolite. with high crystallinity obtained conveniently via an extended hydrothermal treatment with...