Defects study of polymorph B enriched zeolite beta
نویسندگان
چکیده
منابع مشابه
Synthesis of chiral polymorph A-enriched zeolite Beta with an extremely concentrated fluoride route
Chiral zeolitic materials with intrinsically chiral frameworks are highly desired because they can combine both shape selectivity and enantioselectivity. In the field of zeolite, the synthesis of chiral polymorph A of zeolite Beta or chiral polymorph A-enriched zeolite Beta is one of the biggest challenges. We demonstrate here a generalized extremely concentrated fluoride route for the synthesi...
متن کاملModeling permeation through anisotropic zeolite membranes with nanoscopic defects
We have modeled permeation through anisotropic zeolite membranes with nanoscopic defects that create shortcuts perpendicular to the transmembrane direction (x). We have found that the dimensionless ratio Dy /(kd1y) can be used to estimate whether the shortcuts contribute significantly to the overall flux. Here Dy is the diffusion coefficient for motion in the plane of the membrane, kd is the ra...
متن کاملHydrodeoxygenation of m-cresol over gallium-modified beta zeolite catalysts
Ga-modified H-Beta (Ga/HBEA) zeolites were evaluated and compared to other Ga-containing catalysts supported on SiO2 and ZSM-5 (MFI) for the hydrodeoxygenation of m-cresol, a model compound representative of lignin-derived phenolics. The products include toluene, benzene, xylene, light hydrocarbons, as well as phenol and other oxygenated compounds. The appearance of bicyclic compounds suggests ...
متن کاملSynthesis of Cumene by Transalkylation over Modified Beta Zeolite: a Kinetic Study
In the present study, transalkylation of 1,4-diispropylbenzene (DIPB) with benzene in the presence of modified beta zeolite was performed to produce cumene in a fixed bed reactor. Beta zeolite was exchanged with cerium in order to modify its catalytic activity. Activity of the modified catalyst was evaluated in the range of temperature 493K–593K, space time 4.2 kg h/kmol–9.03 kg h/k mol and ben...
متن کاملAdsorption and Diffusion of Xylene Isomers on Mesoporous Beta Zeolite
A systematic and detailed analysis of adsorption and diffusion properties of xylene isomers over Beta zeolites with different mesoporosity was conducted. Adsorption isotherms of xylene isomers over microporous and mesoporous Beta zeolites through gravimetric methods were applied to investigate the impact of mesopores inside Beta zeolites on the adsorption properties of xylene isomers in the pre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2009
ISSN: 0108-7673
DOI: 10.1107/s0108767309095609