The influence of chromium substitution on an iron-titanium catalyst used in the selective catalytic reduction of NO

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1329 viewed

Karami, A

1329 Viewed

Type of Document: Article
DOI: 10.1016/j.jcat.2012.04.007
Publisher: Elsevier , 2012
Abstract:
A series of Cr-substituted Fe-Ti compounds were prepared by the co-precipitation method and were systematically investigated as catalysts for the selective catalytic reduction (SCR) of NO by NH 3. A variety of analytical techniques revealed that the Cr substitution amount affects the N 2 selectivity, SCR activity, redox behavior of NH 3/NO x, adsorption ability, and structure of catalysts in terms of surface properties, porosity, mobility of lattice oxygen, oxidative ability of Cr species, ratio of Bronsted acid sites and Lewis acid sites, NO x adsorption capacity, and structural disorder and distortion. In a series of Fe aCr 1-aTiO x (a = 1, 0.75, 0.5, 0.2, 0) catalysts, Fe 0.5Cr 0.5TiO x showed the highest activity because of the optimized interactions of Fe, Cr, and Ti species in this catalyst
Keywords:
NO x adsorption ; Adsorption ability ; Adsorption capacities ; Analytical techniques ; Bronsted acid sites ; Coprecipitation method ; Cr species ; Cr substitutions ; Lattice oxygen ; Lewis acid site ; Redox behavior ; Selective catalytic reduction of NO ; Structural disorders ; TiO ; Adsorption ; Catalyst selectivity ; Chromium ; Surface properties ; Titanium ; Selective catalytic reduction
Source: Journal of Catalysis ; Volume 292 , August , 2012 , Pages 32-43 ; 00219517 (ISSN)
URL: http://www.sciencedirect.com/science/article/pii/S0021951712001169