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Title: Selective reduction of nitric oxide with methane on gallium and indium containing H-ZSM-5 catalysts: Formation of active sites by solid-state ion exchange

Abstract

H-ZSM-5 catalysts containing Ga and In were prepared by the ion-exchange method and by physically mixing H-ZSM-5 and Ca{sub 2}O{sub 3} or In{sub 2}O{sub 3}, and they were used in the NO reduction with methane to determine the active species of these metals, particularly of In, for this reaction. Ga-loaded H-ZSM-5 prepared by the ion-exchange method gave a higher catalytic activity than the physical mixture of Ga{sub 2}O{sub 3} and H-ZSM-5, of which the catalytic activity was comparable to that of H-ZSM-5. On the contrary, both ion-exchange and physical mixing methods yielded equally high catalytic activities of In-loaded H-ZSM-5. The reduction of No on these catalysts proceeds consecutively by way of oxidation of NO to NO{sub 2} and reduction of NO{sub 2} with CH{sub 4} to N{sub 2}. With increasing heat treatment temperature, the catalytic activity of the mixture of In{sub 2}O{sub 3} and H-ZSM-5 for the reduction of NO{sub 2} increased, while that for NO oxidation decreased. An IR study of OH groups on this catalyst indicated that the solid-state exchange reaction occurred between In{sub 2}O{sub 3} and H-ZSM-5 leading to the increase in the number of indium cation sites and consequently the catalytic activity for NO{sub 2} reduction.more » 21 refs., 8 figs., 1 tab.« less

Authors:
; ; ;  [1]
  1. Waseda Univ., Tokyo (Japan)
Publication Date:
OSTI Identifier:
471641
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 161; Journal Issue: 1; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 20 FOSSIL-FUELED POWER PLANTS; 40 CHEMISTRY; NITRIC OXIDE; SELECTIVE CATALYTIC REDUCTION; METHANE; OXIDATION; GALLIUM; CATALYTIC EFFECTS; INDIUM; ZEOLITES; ION EXCHANGE; CHEMICAL PREPARATION; HETEROGENEOUS CATALYSIS; ABSORPTION SPECTROSCOPY

Citation Formats

Kikuchi, E, Ogura, M, Terasaki, I, and Goto, Y. Selective reduction of nitric oxide with methane on gallium and indium containing H-ZSM-5 catalysts: Formation of active sites by solid-state ion exchange. United States: N. p., 1996. Web. doi:10.1006/jcat.1996.0205.
Kikuchi, E, Ogura, M, Terasaki, I, & Goto, Y. Selective reduction of nitric oxide with methane on gallium and indium containing H-ZSM-5 catalysts: Formation of active sites by solid-state ion exchange. United States. https://doi.org/10.1006/jcat.1996.0205
Kikuchi, E, Ogura, M, Terasaki, I, and Goto, Y. Sat . "Selective reduction of nitric oxide with methane on gallium and indium containing H-ZSM-5 catalysts: Formation of active sites by solid-state ion exchange". United States. https://doi.org/10.1006/jcat.1996.0205.
@article{osti_471641,
title = {Selective reduction of nitric oxide with methane on gallium and indium containing H-ZSM-5 catalysts: Formation of active sites by solid-state ion exchange},
author = {Kikuchi, E and Ogura, M and Terasaki, I and Goto, Y},
abstractNote = {H-ZSM-5 catalysts containing Ga and In were prepared by the ion-exchange method and by physically mixing H-ZSM-5 and Ca{sub 2}O{sub 3} or In{sub 2}O{sub 3}, and they were used in the NO reduction with methane to determine the active species of these metals, particularly of In, for this reaction. Ga-loaded H-ZSM-5 prepared by the ion-exchange method gave a higher catalytic activity than the physical mixture of Ga{sub 2}O{sub 3} and H-ZSM-5, of which the catalytic activity was comparable to that of H-ZSM-5. On the contrary, both ion-exchange and physical mixing methods yielded equally high catalytic activities of In-loaded H-ZSM-5. The reduction of No on these catalysts proceeds consecutively by way of oxidation of NO to NO{sub 2} and reduction of NO{sub 2} with CH{sub 4} to N{sub 2}. With increasing heat treatment temperature, the catalytic activity of the mixture of In{sub 2}O{sub 3} and H-ZSM-5 for the reduction of NO{sub 2} increased, while that for NO oxidation decreased. An IR study of OH groups on this catalyst indicated that the solid-state exchange reaction occurred between In{sub 2}O{sub 3} and H-ZSM-5 leading to the increase in the number of indium cation sites and consequently the catalytic activity for NO{sub 2} reduction. 21 refs., 8 figs., 1 tab.},
doi = {10.1006/jcat.1996.0205},
url = {https://www.osti.gov/biblio/471641}, journal = {Journal of Catalysis},
number = 1,
volume = 161,
place = {United States},
year = {1996},
month = {6}
}