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Realization of rapid synthesis of H-ZSM-5 zeolite by seed-assisted method for aromatization reactions of methanol or methane.
- Source :
-
Canadian Journal of Chemistry . 2021, Vol. 99 Issue 11, p874-880. 7p. - Publication Year :
- 2021
-
Abstract
- H-ZSM-5 zeolites are successfully synthesized within 1 h with an organic template free system by the seed-assisted method. The synthetic method not only reduces the production cost of H-ZSM-5 zeolite, but also decreases the environmental pollution produced compared with that of the conventional synthesis process. Characterization by SEM, XRD, N2 adsorption–desorption, NH3-TPD, and Py-IR confirms that the H-ZSM-5 product has a high crystallinity and reveals that the rapid synthesis process is in accordance with the seed surface crystallization mechanism. To improve the aromatic selectivity on the H-ZSM-5 zeolite, different concentrations of Mo and Zn catalysts were prepared by incipient wetness impregnation and the ion-exchange method. Mo-Zn/H-ZSM-5-SAS-1 h have similar catalytic lifetimes and higher selectivity of paraxylene in aromatic products compared with Mo-Zn/H-ZSM-5-seed in the reaction of methanol to aromatic. However, the catalytic lifetime of 6%Mo/H-ZSM-5-SAS-1 h is shorter than that of the 6%Mo/H-ZSM-5-seed catalyst in methane to benzene reaction under the same reaction conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00084042
- Volume :
- 99
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Canadian Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 153244137
- Full Text :
- https://doi.org/10.1139/cjc-2021-0095