1. Shaped Hierarchical H-ZSM-5 Catalysts for the Conversion of Dimethyl Ether to Gasoline
- Author
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Julian Holzinger, Jörg Sauer, Thomas Otto, Michael Zimmermann, Thomas A. Zevaco, Jørgen Skibsted, Simon Wodarz, Stephan Pitter, and Nikolaj A. Slaby
- Subjects
Chemistry ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Industrial and Manufacturing Engineering ,Catalysis ,chemistry.chemical_compound ,020401 chemical engineering ,Organic chemistry ,Dimethyl ether ,0204 chemical engineering ,ZSM-5 ,Gasoline ,0210 nano-technology - Abstract
Hierarchical H-ZSM-5 zeolites are a promising class of heterogeneous catalysts that have shown encouraging results in lab-scale studies for the production of gasoline from dimethyl ether (DTG conversion). However, the influences of mesopore formation and shaping on various catalyst properties are still under debate. In this study, a series of H-ZSM-5 zeolites with hierarchical pore structures were prepared by modifying commercially available zeolites via alkaline treatment ("desilication"). The powdered zeolites were shaped into technical catalyst bodies by wet extrusion using either silica or alumina binders. All materials were extensively characterized. The different interactions during alkaline treatment were related to the observed modifications in the zeolite properties of the materials obtained. Although many properties of modified and untreated zeolite powders remained predominantly unchanged in their shaped catalyst equivalents, both binders affected certain material characteristics, particularly those related to their acidity. Finally, preliminary tests showed enhanced catalytic performance of hierarchical ZSM-5 catalysts in DTG conversion.
- Published
- 2020
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