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
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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
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Journal ArticleDOI
The Investigation of Preparing the Beta Zeolite Membrane by the Way of Secondary Growth
TL;DR: In this article, a Beta zeolite membrane was prepared on the surface of α-Al2O3 support tube with large pore by the way of secondary growth, and the prepared membrane was characterized by SEM and XRD.
Journal ArticleDOI
Structure, energetics and diffusion properties of isomers of trimethyl benzene in β zeolite: Uptake and Monte Carlo simulation study
Srinivasa Rao Varanasi,Prakash Kumar,Vijayalakshmi Ravi Puranik,Arun M. Umarji,Subramanian Yashonath +4 more
TL;DR: In this article, a Monte Carlo study along with experimental uptake measurements of 1,2,3-trimethyl benzene, 1, 2,4-trimentyl benzene and TMB in beta zeolite is reported along with the TraPPE potential has been employed for hydrocarbon interaction and harmonic potential of Demontis for modeling framework.
Journal ArticleDOI
Influence of TEA2O/SiO2 ratio on the polymorph formation and crystallization of zeolite beta
A. Sagarzazu,Gema González +1 more
TL;DR: A detailed study of the effect of the variation of TEA 2 O/SiO 2 on the synthesis of zeolite beta has been carried out, for different molar ratios: 0.15, 0.27,0.50 and 0.75 as mentioned in this paper.
Book ChapterDOI
Chapter 4 How to build zeolites
TL;DR: In this article, a pictorial description of several ways to build the (disordered) frameworks of 73 zeolite structure types is given, including infinite building units like chains and layers, and finite building units, like single or double 6-rings.
Book ChapterDOI
Synthesis and structure of polymorph B of Beta zeolite
María J. Díaz-Cabañas,Avelino Corma,Manuel Moliner,Ángel Cantín,José L. Jordá,Daliang Zhang,Junliang Sun,Kjell Jansson,Sven Hovmöller,Xiaodong Zou +9 more
TL;DR: In this article, the structure of polymorph B has been successfully determined by SAED and HRTEM from the areas of unfaulted polymorph B crystals, in such a way that the presented methodology allows obtaining a Beta zeolite with the highest content in polymorph B up to now.
References
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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.