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Issue 5, 2016
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Ceria-based catalysts for low-temperature selective catalytic reduction of NO with NH3

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Abstract

Selective catalytic reduction of NO with NH3 (NH3-SCR) is a powerful technique for the abatement of NOx from stationary sources, and the currently used VOx/TiO2-based catalysts are widely applicable for medium-temperature conditions but not suitable for NH3-SCR operated at low temperatures. Recently, low-temperature NH3-SCR has attracted considerable attention owing to the vast demand in industrial furnaces and its energy-conserving feature. During the past years, a great many studies have demonstrated that ceria-based catalysts are potential candidates as catalysts for low-temperature NH3-SCR. Herein we summarize the recent advances in the application of ceria-based catalysts for low-temperature NH3-SCR. The review begins with a brief introduction of the general guideline for low-temperature NH3-SCR and the interaction between the reactants and CeO2. The different roles of ceria as a pure support/active species, bulk doping component and surface modifier are discussed. As well, the mechanistic investigations (active sites, intermediates, reaction mechanism) and SO2/H2O tolerance are emphasized. Lastly, the perspectives on the opportunities and challenges of ceria-based catalysts for low-temperature NH3-SCR in future research are presented.

Graphical abstract: Ceria-based catalysts for low-temperature selective catalytic reduction of NO with NH3

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Publication details

The article was received on 06 Sep 2015, accepted on 29 Nov 2015 and first published on 09 Dec 2015


Article type: Minireview
DOI: 10.1039/C5CY01487E
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Catal. Sci. Technol., 2016,6, 1248-1264

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    Ceria-based catalysts for low-temperature selective catalytic reduction of NO with NH3

    C. Tang, H. Zhang and L. Dong, Catal. Sci. Technol., 2016, 6, 1248
    DOI: 10.1039/C5CY01487E

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