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
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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Characterisation of Lewis and Brønsted acidic sites in H-MFI and H-BEA zeolites : a thermodynamic and ab initio study
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Structural Determination of Ordered Porous Solids by Electron Crystallography
TL;DR: In this paper, the structure of porous materials is studied for understanding their properties and exploiting them for applications using Electron crystallography, which has two main advantages compared to X-ray radiography.
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Micron-Sized Zeolite Beta Single Crystals Featuring Intracrystal Interconnected Ordered Macro-Meso-Microporosity Displaying Superior Catalytic Performance
Ming-Hui Sun,Ming-Hui Sun,Li-Hua Chen,Shen Yu,Yu Li,Xian-Gang Zhou,Zhi-Yi Hu,Yuhan Sun,Yuhan Sun,Yan Xu,Bao-Lian Su,Bao-Lian Su +11 more
TL;DR: The in-situ bottom-up confined crystallization strategy to hierarchically porous zeolite single crystal is highly universal and has been extended to the successful synthesis of other zeolitic materials, including ZSM-5, TS-1 and SAPO-34 and can be applied to many other industrial catalytic reactions.
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Selectively convert fructose to furfural or hydroxymethylfurfural on Beta zeolite: The manipulation of solvent effects
TL;DR: In this paper, strong solvent effects on the selectivity of fructose conversion were observed in different manners depending on the solvent used, and it was shown that the coordinated state of framework aluminum, induced by solvent effects, has a major impact on selectivity, while the configuration of aluminum was no influenced by other solvents such as γ-butyrolactone.
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Synthesis and thermal stability of beta zeolite using ammonium fluoride
TL;DR: In this article, the thermal stability of BEA zeolite with NH4F as a fluoride source was investigated in detail, and it was found that the improved thermal stability was attributed to much less framework defects.
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.
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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.
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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.