Open AccessJournal Article
The framework topology of zeolite beta
John B. Higgins,R.B. LaPierre,John L. Schlenker,A.C. Rohrman,J.D. Wood,G.T. Kerr,W.J. Rohrbaugh +6 more
Reads0
Chats0
TLDR
The tetrahedral framework structure of zeolite beta is disordered along (001) planes as mentioned in this paper, and the disordered structure is related by a/3 and/or b/3 displacements on (1) planes to three ordered polytype structures with triclinic, monoclinic and tetragonal symmetry.Abstract:
The tetrahedral framework structure of zeolite beta is disordered along (001). The disordered structure is related by a/3 and/or b/3 displacements on (001) planes to three ordered polytype structures with triclinic, monoclinic, and tetragonal symmetry. Three mutually perpendicular 12-ring channel systems are characteristic of the three ordered polytypes and the disordered beta structure. The proposed framework structures are consistent with the known diffraction, sorption an cation exchange properties of zeolite beta.read more
Citations
More filters
Journal ArticleDOI
Propylene synthesis via isomerization–metathesis of 1-hexene and FCC olefins
Gyula Novodárszki,Blanka Szabó,Róbert Auer,Katalin Tóth,László Leveles,Róbert Barthos,Gábor Turczel,Zoltán Pászti,József Valyon,Magdolna R. Mihályi,Robert Tuba +10 more
TL;DR: In this paper, Zeolite H-beta (HBEA) was applied as an isomerization catalyst for the conversion of 1-hexene or olefins obtained by fluid catalytic cracking (FCC) to propylene via ISOMET using ethylene as a cross-coupling agent.
Journal ArticleDOI
Synthesis of α,β-unsaturated ketones from alkynes and aldehydes over Hβ zeolite under solvent-free conditions
Naresh Mameda,Naresh Mameda,Swamy Peraka,Swamy Peraka,Srujana Kodumuri,Durgaiah Chevella,Rammurthy Banothu,Rammurthy Banothu,Vasu Amrutham,Narender Nama,Narender Nama +10 more
TL;DR: A facile Hβ zeolite-catalyzed strategy has been successfully developed for the synthesis of α,β-unsaturated ketones from alkynes and aldehydes under solvent-free conditions as mentioned in this paper.
Journal ArticleDOI
Nanocrystalline Zeolite Tetraethylammonium‐Beta Membrane for Preferential Sorption and Transport of CO2 over N2
Puyam S. Singh,Puyam S. Singh,Thangaraj Selvam,Stephanie Reuß,Abhijeet Avhale,Sofia Lopez-Orozco,Wilhelm Schwieger +6 more
TL;DR: In this paper, a nanocrystalline zeolite tetraethylammonium (TEA)-beta membrane prepared on a stainless-steel porous disc by repeated hydrothermal crystallization was used for CO2/N2 gas separation.
Journal ArticleDOI
A comparative study of the adsorption of water and methanol in zeolite BEA: a molecular simulation study
TL;DR: In this article, the equilibrium adsorption concentration of methanol and water in all-silica BEA zeolite and HBEA Zeolites with different Si/Al ratios over a wide range of temperatures and loadings was investigated.
Journal ArticleDOI
An UV-Visible study of the stability of the ruthenium hexaammine cation in BEA zeolites—comparison with NaY
TL;DR: In this paper, a series of Ru/zeolites with Ru content in the range of 1 − 7 wt.% was prepared by cationic exchange in an aqueous Ru(NH3)6Cl3 solution, at room temperature, of two H-BEA (different particle sizes but same Si/Al ratio of 13), a Cs−BEA and a NaY (Si/Al = 13) and zeolitic supports.
References
More filters
Journal ArticleDOI
The crystal structure of mordenite (ptilolite)
TL;DR: Mordenite, a zeolite, was derived by superposition of the three-dimensional Patterson function and partially refined assuming the centric symmetry Cmcm or Cmc2t as discussed by the authors.
Journal ArticleDOI
The framework topology of ZSM-12: A high-silica zeolite
TL;DR: In this article, the structure of ZSM-12, a high-silica zeolite, was determined by analysis of electron and X-ray powder diffraction data combined with model building.
Journal ArticleDOI
The framework topology of ZSM-22: A high silica zeolite
TL;DR: ZSM-22 as discussed by the authors, an orthorhombic high silica zeolite (Cmcm, a = 13.86 ± 0.03A, b = 17.41± 0.04A, and c = 5.5 × 4.5 A), has a framework consisting of 5-, 6- and 10-rings.
Journal ArticleDOI
The framework topology of ZSM-48: A high silica zeolite
TL;DR: In this article, a disordered structure consisting of ferrierite sheets linked via bridging oxygens located on mirror planes is proposed for this material, characterized by ten-ring noninterpenetrating linear channels whose ideal dimensions are 5.3 × 5.6 A.
Journal ArticleDOI
The framework topology of ZSM-23: A high silica zeolite
A.C. Rohrman,R.B. LaPierre,J.L. Schlenker,J.D. Wood,Ernest W. Valyocsik,M.K. Rubin,J.B. Higgins,W.J. Rohrbaugh +7 more
TL;DR: ZSM-23 as discussed by the authors is a high-silica zeolite with lattice parameters of: a = 5.01 ± 0.02A, b = 21.52± 0.04A, and c = 11.13 ± 1.03A.