Dynamics of N2O decomposition over HZSM-5 with low Fe content

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Dynamics of N2O decomposition over HZSM-5 with low Fe content

The dynamics of N2O decomposition to gaseous nitrogen and oxygen over HZSM-5 catalysts with a low iron content (200 and 1000 ppm) was studied by the transient response method in the temperature range 523–653 K. The active catalysts were prepared from HZSM-5 with Fe in the framework on its steaming at 823 K followed by thermal activation in He at 1323 K. Two main steps were distinguished in the ...

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Transient response method for characterization of active sites in HZSM-5 with low content of iron during N2O decomposition

The surface active Fe-sites in HZSM-5 with low content of iron (<1000 ppm) activated by steaming and high temperature (up to 1323 K) calcination in inert lead to the formation of surface oxygen (O)ad species from N2O and were characterized quantitatively by transient response method. Only a part of (O)ad deposited on zeolite by decomposing N2O was active in CO oxidation at 523 K. A binuclear Fe...

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Active sites in HZSM-5 with low Fe content for the formation of surface oxygen by decomposing N2O: is every deposited oxygen active?

Surface-active centers were detected in HZSM-5 with a low content of iron (< 1000 ppm) activated by steaming and high-temperature calcination in inert atmospheres (up to 1323 K). These centers lead to the formation of surface oxygen (O)ad species from N2O and were characterized quantitatively by the transient response method. The total amount of active centers was proportional to the content of...

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ژورنال

عنوان ژورنال: Journal of Catalysis

سال: 2004

ISSN: 0021-9517

DOI: 10.1016/j.jcat.2003.11.012