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Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures

Paper ID Volume ID Publish Year Pages File Format Full-Text
54580 47016 2013 6 PDF Available
Title
Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures
Abstract

•Catalyst for the selective reduction of NOx with NH3 at low temperatures.•Mn-Ce mixed oxide prepared by the surfactant-template (ST) method is more active.•More reactive NH3 species formed on Mn-Ce catalyst prepared by the ST method.•NOx adsorption and activation was promoted on Mn-Ce catalyst prepared by the ST method.

A series of Mn-Ce mixed oxide catalysts with different molar ratio of Mn/Ce were prepared by the surfactant-template (ST) method and conventional co-precipitation (CP) method for the selective catalytic reduction of NOx with ammonia (NH3-SCR) at low temperatures. Catalyst preparation method exerts significant influence on the catalytic performance, and Mn-Ce mixed oxide catalyst prepared by ST method is more active than that prepared by CP method. The best Mn-Ce mixed oxide catalyst prepared by ST method yielded nearly 100% NOx conversion in the temperature range of 100–200 °C. Moreover, its resistance against H2O and SO2 is higher. The high surface area of Mn-Ce mixed oxide catalyst prepared by the ST method could contribute to the adsorption and activation of NH3 as well as NOx, thus promoting the NOx reduction to proceed.

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Keywords
NOx; Selective catalytic reduction; Mn-Ce mixed oxide; Preparation method; In situ DRIFTS
First Page Preview
Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 216, 1 November 2013, Pages 76–81
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis