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The effect of temperature on the pulsed current processing behaviour and structural characteristics of porous ZSM-5 and zeolite Y monoliths
Authors:Petr Olegovich Vasiliev  Arto Ojuva  Jekabs Grins  Lennart Bergström
Affiliation:1. Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden;2. EXSELENT- Berzelii Centre on Porous Materials at Stockholm University, Sweden;1. Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Institute of Chemical Reaction Engineering, Egerlandstraße 3, 91058 Erlangen, Germany;2. Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Chair of Metals Science and Technology, Martensstraße 5, 91058 Erlangen, Germany;3. Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Chair of Theoretical Chemistry, Egerlandstrsße 3, 91058 Erlangen, Germany;4. Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Joint Institute of Advanced Materials and Processes (ZMP), Dr.-Mack-Straße 81, 90762 Fürth, Germany;1. Institute of Chemistry, Applied Science and Technology Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;2. Institute of Materials Physics and Engineering, Applied Science and Technology Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;3. INSTM, Torino Politecnico Unit, Torino, Italy;4. CR-INSTM for Materials with Controlled Porosity, Italy;1. Clean Fuels and Catalysis Program, EMS Energy Institute, and Department of Energy & Mineral Engineering, Pennsylvania State University, 209 Academic Projects Building, University Park, PA 16802, USA;2. Department of Chemical Engineering, Pennsylvania State University, University Park, PA 16802, USA;3. AMG Catalysis and Chemistry Consulting, West Chester, PA 19382, USA;4. Lummus Technology, 1515 Broad Street, Bloomfield, NJ 03007, USA;1. Centro de Química, Instituto Venezolano de Investigaciones Científicas, Apartado Postal 20632, Caracas 1020A, Venezuela;2. Escuela de Ingeniería Química, Facultad de Ingeniería, Universidad Central de Venezuela, Apartado Postal 48057, Caracas 1020A, Venezuela;1. Innovation Center of the Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia;2. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
Abstract:Hierachically porous monoliths of ZSM-5 and Y zeolites have been prepared by pulsed current processing (PCP). The densification behaviour and structural characteristics during rapid thermal treatment of the zeolites have been determined and related to the influence of the Si:Al ratio on the thermal stability of the zeolites. Monoliths of macroscopic shape can be prepared with an insignificant loss of surface area and micropore volume when the PCP-treatment was performed at temperatures below a critical maximum PCP temperature (TPCP). Full-profile fittings of the powder X-ray diffraction patterns showed that the lattice strain of zeolite Y increases rapidly above the critical TPCP while the ZSM-5 zeolites undergo a phase transition from orthorhombic to monoclinic. The use of a novel ceramic processing route for the production of the zeolite monoliths that do not significantly influence the structural characteristics and surface area of the starting materials has a potential to be of importance in catalysis and gas separation applications.
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