The zeolite's textural properties have a significant effect on effectiveness in the different industrial processes. This research aimed to study textual of NaX and FeX zeolites using nitrogen adsorption-desorption technique at constant low temperature. According International Union Pure Applied Chemistry, isotherm showed that studied materials were mixed kinds I/II isotherms H3 type hysteresis....

zeolites a, x and hs were synthesized from natural iranian kaolinite by alkaline fusion,,followed by refluxing the mixture. the transformation of zeolites x to hs and y to p were studied at different time intervals by x-ray diffraction and scanning electron microscopy (sem). it was revealed that in solution, zeolites hs and p are more stable than zeolites x and y respectively

In this work, the method of enzyme adsorption on different zeolites and mesoporous silica spheres (MSS) was investigated for the creation of conductometric biosensors. The conductometric transducers consisted of gold interdigitated electrodes were placed on the ceramic support. The transducers were modified with zeolites and MSS, and then the enzymes were adsorbed on the transducer surface. Dif...

Solid (heterogeneous) catalysts (1–4) are favored in industrial processes because they eliminate the need to separate the catalyst from the products. Heterogeneous catalysts can be solid acids, bases, supported metals, mixed metal oxides, or multifunctional materials. Commercial processes based on solid acids outnumber all others, and zeolites (and closely related materials) are usually the sol...

Zeolites are nanoporous crystalline alumino-silicates with a rich variety of interesting properties and industrial applications. With over 140 zeolite framework topologies synthetically available—each with its own range of compositions—zeolites offer size-, shapeand electrostaticallyselective adsorption, diffusion and reaction up to remarkably high temperatures. Zeolites are widely used as petr...

The catalytic properties of modified synthetic (A, X, Y) and natural (MOR, Clp) zeolites have been studied in the reactions oxidative dehydrogenation butyl alcohols to corresponding carbonyl com-pounds. It has established that bimetallic zeolite catalysts show higher activity these

The evaluation of the pore-size distribution (PSD) of natural and modified mesoporous zeolites, i.e., clinoptilolites is presented. We demonstrate the SEM results showing that the pores of fracture-type from 25-50 nm to 100 nm in size between clinoptilolite grains, as well as pores between crystal aggregates up to 500 nm in size are present in the studied material. The detailed distribution of ...

A methodology to engineer roughened inorganic nanostructures on zeolites by deposition and growth of metal hydroxides is reported. Pure-silica (PS) MFI and (aluminosilicate) LTA zeolite crystals are treated by solvothermal methods to deposit inorganic hydroxide (e.g., Mg(OH)2) coatings with nanoscale roughened features on the crystal surfaces in a controlled manner. Detailed characterization of...