shape-selective methylation of naphthalene (naph) over sapo-11 zeolite was carried out in a fixed-bed flow reactor under atmospheric pressure. some zeolites, such as h-beta (hβ), husy and zsm-5 were also evaluated for comparison with sapo-11 zeolite.the results showed that sapo-11 exhibited higher stability, higher selectivity of  2,6-dimethylnaphthalene (2,6-dmn), and higher 2,6-/2,7-dmn ratio...

A detailed investigation of the hydrothermal crystallization SAPO-34 in presence novel 1-propylpyridinium hydroxide ([PrPy]OH) organic structural directing agent is presented. The synthesis conditions are systematically tuned to investigate effects various parameters (viz. concentrations each reactant, time, and temperature) on nucleation SAPO-34. results show that a careful variation formation...

The chabazite-type silicoaluminophosphate SAPO-34 is a promising adsorbent for applications in thermal energy storage using water adsorption-desorption cycles. In order to develop a microscopic understanding of the impact of local heterogeneities and defects on the water adsorption properties, the interaction of different models of SAPO-34 with water was studied using dispersion-corrected densi...

SAPO-40, a silicoaluminophosphate with a structure not topologically related with any aluminosilicate zeolite, was synthesised for the first time in 1984 by Lok and co-workers [1]. Recently, a synthesis procedure leading to pure SAPO40 was developed and the structure of this material was established by crystallographic methods. The framework topology (designated AFR by the International Zeolite...

In order to enhance the catalytic performance of SAPO-34 catalyst for the reaction of methanol to olefins (MTO), ultrasonic and microwave-assisted aging method were employed in static hydrothermal method to synthesize nano-sized SAPO-34. The effects of the application of this method on the chemical composition, morphology, surface area and total acidity of SAPO-34 were characterized by XRD, FE-...