Zeolites are microporous aluminosilicates with well-defined channels and cavities. They have been widely used as ionexchangers, molecular sieves, sorbents, and catalysts. The stability of zeolites is crucial to their applications. Many experimental and theoretical studies have been concentrated on their thermal stability. On the contrary, their behavior under external high pressures has receive...

This study aimed to valorize microcrystalline cellulose (MCC) using protonated zeolite catalysts such as (H-ZSM-5) and Cr/H-ZSM-5 (5%) in ionic liquid. The catalytic effect synergy with 1-butyl-3-methylimidazolium Chloride ([BMIM] Cl) liquid was studied detail. total reducing sugar (TRS) determined the 3, 5-dinitrisalcylic acid (DNS) array method. were characterized techniques Fourier transform...

In order to improve the adsorption performance of molecular sieve honeycomb ceramics for VOCs, author proposes a research method VOCs based on loaded with sieves. The prepared cordierite ceramic-supported HY, Na Y, USY, ZSM-5-300, and ZSM-5-360 monolithic materials by coating method. Using toluene, ethyl acetate, isopropanol, acetone as adsorbates, properties single-component mixed-component or...

Comparative studies over micro-/mesoporous Cu-containing zeolites ZSM-5 prepared by top-down treatment involving NaOH, TPAOH or mixture of NaOH/TPAOH (tetrapropylammonium hydroxide) were conducted. The results the catalytic data revealed highest activity Cu-ZSM-5 catalyst both in absence and presence water vapor. physico-chemical characterization (diffuse reflectance UV-Vis (DR UV-Vis), Fourier...

The tetralin hydrocracking process into benzene, toluene, and xylenes (BTX) was investigated over metal-modified (Ga, Nb, Ni, NiMo, Sn, W, Zr or H3[P(W3O10)4])/ZSM-5 zeolite catalysts without sulfidation procedures, mechanism analyzed, compared with a pristine microporous material in packed bed reactor under applied atmospheric pressure (p). This experimental study presents an investigation of ...

Iron-modified ZSM-5 zeolites (FeZSM-5s) have been considered to be a promising catalyst system to reduce nitrogen oxide emissions, one of the most important global environmental issues, but their synthesis faces enormous economic and environmental challenges. Herein we report a cheap and green strategy to fabricate hierarchical FeZSM-5 zeolites from natural aluminosilicate minerals via a nanosc...

Medium-pore (diameter ~ 6A) zeolites such as ZSM-5 and silicalite impregnated with Group VIII metals provide selective catalytic pathways for the conversion of synthesis gas to gasoline or olefins. Mössbauer and magnetic studies on these catalysts containing iron or iron plus cobalt are reported. The zeolites were impregnated with metal nitrate solutions, reduced, and carbided to yield showed F...