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ID: 671352.0, MPI für Chemische Physik fester Stoffe / publications 2013
Coke location in microporous and hierarchical ZSM-5 and the impact on the MTH reaction
Authors:Schmidt, F.; Hoffmann, C.; Giordanino, F.; Bordiga, S.; Simon, P.; Carrillo-Cabrera, W.; Kaskel, S.
Language:English
Date of Publication (YYYY-MM-DD):2013-11-13
Title of Journal:Journal of Catalysis
Volume:307
Start Page:238
End Page:245
Review Status:not specified
Audience:Not Specified
Abstract / Description:The deactivation and reactivation of microporous and hierarchical ZSM-5 zeolites have been studied in the methanol-to-hydrocarbon (MTH) reaction. The hierarchical ZSM-5 was synthesized via the desilication reassembly technique using cetyltrimethylammonium bromide as a surfactant. The catalysts differed significantly in the catalytic behavior after the reactivation procedure. This is ascribed to a different coke location in the deactivated catalysts arising from the difference in the porosity. The microporous ZSM-5 showed a coke gradient over the particle with a stronger accumulation of carbonaceous species in the outer particle layers, whereas a homogeneous coke distribution was observed for the deactivated hierarchical ZSM-5. Due to the diverging coke distribution, the irreversible damage of the zeolitic structure caused by reactivation differs for both catalysts. This fact is assumed to be the reason for the different deactivation/reactivation behaviors of these two zeolitic systems. (C) 2013 Elsevier Inc. All rights reserved.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000327903900026 [ID No:1]
ISSN:0021-9517 [ID No:2]
DOI:10.1016/j.jcat.2013.07.020
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