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Title: NO reduction by CO over Rh/Al[sub 2]O[sub 3]. Effects of rhodium dispersion on the catalytic properties

Abstract

The effects of variation of the rhodium dispersion on the catalytic reduction of NO by CO over Rh/Al[sub 2]O[sub 3] catalysts have been investigated. NO dissociation is promoted by an increase of metal particle size which results in an enhanced catalytic activity on a turnover basis. However, the promotional effect of the particle size on the activity strongly depends on the reaction temperature, since under reaction conditions the oxidative disruption and reductive agglomeration processes modify the rhodium particle size. These processes appear to be responsible for changes of the apparent activation energy observed around 500 K. 39 refs., 6 figs., 2 tabs.

Authors:
; ; ;  [1];  [2]
  1. (Universita di Trieste (Italy))
  2. (Universita di Udine (Italy))
Publication Date:
OSTI Identifier:
7035039
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis; (United States)
Additional Journal Information:
Journal Volume: 146:1; Journal ID: ISSN 0021-9517
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; ALUMINIUM OXIDES; CATALYTIC EFFECTS; NITRIC OXIDE; REDUCTION; RHODIUM; ACTIVATION ENERGY; AGGLOMERATION; CARBON MONOXIDE; CATALYST SUPPORTS; DISPERSIONS; HETEROGENEOUS CATALYSIS; PARTICLES; ALUMINIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CATALYSIS; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; ENERGY; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties; 010800 - Coal, Lignite, & Peat- Waste Management; 200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions

Citation Formats

Kaspar, J., Leitenburg, C. de, Fornasiero, P., Graziani, M., and Trovarelli, A. NO reduction by CO over Rh/Al[sub 2]O[sub 3]. Effects of rhodium dispersion on the catalytic properties. United States: N. p., 1994. Web. doi:10.1016/0021-9517(94)90016-7.
Kaspar, J., Leitenburg, C. de, Fornasiero, P., Graziani, M., & Trovarelli, A. NO reduction by CO over Rh/Al[sub 2]O[sub 3]. Effects of rhodium dispersion on the catalytic properties. United States. doi:10.1016/0021-9517(94)90016-7.
Kaspar, J., Leitenburg, C. de, Fornasiero, P., Graziani, M., and Trovarelli, A. Tue . "NO reduction by CO over Rh/Al[sub 2]O[sub 3]. Effects of rhodium dispersion on the catalytic properties". United States. doi:10.1016/0021-9517(94)90016-7.
@article{osti_7035039,
title = {NO reduction by CO over Rh/Al[sub 2]O[sub 3]. Effects of rhodium dispersion on the catalytic properties},
author = {Kaspar, J. and Leitenburg, C. de and Fornasiero, P. and Graziani, M. and Trovarelli, A.},
abstractNote = {The effects of variation of the rhodium dispersion on the catalytic reduction of NO by CO over Rh/Al[sub 2]O[sub 3] catalysts have been investigated. NO dissociation is promoted by an increase of metal particle size which results in an enhanced catalytic activity on a turnover basis. However, the promotional effect of the particle size on the activity strongly depends on the reaction temperature, since under reaction conditions the oxidative disruption and reductive agglomeration processes modify the rhodium particle size. These processes appear to be responsible for changes of the apparent activation energy observed around 500 K. 39 refs., 6 figs., 2 tabs.},
doi = {10.1016/0021-9517(94)90016-7},
journal = {Journal of Catalysis; (United States)},
issn = {0021-9517},
number = ,
volume = 146:1,
place = {United States},
year = {1994},
month = {3}
}