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  Coke location in microporous and hierarchical ZSM-5 and the impact on the MTH reaction

Schmidt, F., Hoffmann, C., Giordanino, F., Bordiga, S., Simon, P., Carrillo-Cabrera, W., et al. (2013). Coke location in microporous and hierarchical ZSM-5 and the impact on the MTH reaction. Journal of Catalysis, 307, 238-245. doi:10.1016/j.jcat.2013.07.020.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1E20-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-358F-4
Genre: Journal Article

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Schmidt, F., Author
Hoffmann, C., Author
Giordanino, F., Author
Bordiga, S., Author
Simon, P.1, Author              
Carrillo-Cabrera, W.2, Author              
Kaskel, S., Author
Affiliations:
1Paul Simon, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863418              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2013-11-13
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: eDoc: 671352
ISI: 000327903900026
DOI: 10.1016/j.jcat.2013.07.020
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Title: Journal of Catalysis
Source Genre: Journal
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Pages: - Volume / Issue: 307 Sequence Number: - Start / End Page: 238 - 245 Identifier: ISSN: 0021-9517