Evidence of Intracrystalline Mesostructured Porosity in Zeolites by Advanced Gas Sorption, Electron Tomography and Rotation Electron Diffraction

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Título: Evidence of Intracrystalline Mesostructured Porosity in Zeolites by Advanced Gas Sorption, Electron Tomography and Rotation Electron Diffraction
Autor/es: Garcia-Martinez, Javier | Xiao, Changhong | Cychosz, Katie A. | Li, Kunhao | Wan, Wei | Zou, Xiaodong | Thommes, Matthias
Grupo/s de investigación o GITE: Laboratorio de Nanotecnología Molecular (NANOMOL)
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Inorgánica
Palabras clave: Catalysis | Characterization | Cracking | Mesoporous materials | Zeolites
Área/s de conocimiento: Química Inorgánica
Fecha de publicación: nov-2014
Editor: Wiley-VCH Verlag GmbH & Co. KGaA
Cita bibliográfica: ChemCatChem. 2014, 6(11): 3110-3115. doi:10.1002/cctc.201402499
Resumen: The small size of micropores (typically <1 nm) in zeolites causes slow diffusion of reactant and product molecules in and out of the pores and negatively impacts the product selectivity of zeolite based catalysts, for example, fluid catalytic cracking (FCC) catalysts. Size-tailored mesoporosity was introduced into commercial zeolite Y crystals by a simple surfactant-templating post-synthetic mesostructuring process. The resulting mesoporous zeolite Y showed significantly improved product selectivity in both laboratory testing and refinery trials. Advanced characterization techniques such as electron tomography, three-dimensional rotation electron diffraction, and high resolution gas adsorption coupled with hysteresis scanning and density functional theory, unambiguously revealed the intracystalline nature and connectivity of the introduced mesopores. They can be considered as molecular highways that help reactant and product molecules diffuse quickly to and away from the catalytically active sites within the zeolite crystals and, thus, shift the selectivity to favor the production of more of the valuable liquid fuels at reduced yields of coke and unconverted feed.
Patrocinador/es: The ET and RED work were supported by the Swedish Research Council (VR), the Swedish Governmental Agency for Innovation Systems (VINNOVA), and the Knut & Alice Wallenberg Foundation through the project grant 3DEM-NATUR. The EM facility was also supported by the Knut & Alice Wallenberg Foundation.
URI: http://hdl.handle.net/10045/46455
ISSN: 1867-3880 (Print) | 1867-3899 (Online)
DOI: 10.1002/cctc.201402499
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1002/cctc.201402499
Aparece en las colecciones:INV - NANOMOL - Artículos de Revistas

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