English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

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

MPS-Authors
/persons/resource/persons126855

Simon,  P.
Paul Simon, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126563

Carrillo-Cabrera,  W.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

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.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-1E20-5
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.