title: Preparation of Mn-based selective catalytic reduction catalysts by three methods and optimization of process conditions.
abstract: Mn-based catalysts enable high NO x conversion in the selective catalytic reduction of NO x with NH3. Three catalyst-production methods, namely, co-precipitation, impregnation, and sol-gel, were used in this study to determine the optimum method and parameters. The maximum catalytic activity was found for the catalyst prepared by sol-gel with a 0.5 Mn/Ti ratio. The denitrification efficiency using this catalyst was >90%, which was higher than those of catalysts prepared by the two other methods. The critical temperature of catalytic activity was 353 K. The optimum manganese acetate concentration and weathering time were 0.10 mol and 24 h, respectively. The gas hourly space velocity and O2 concentration were determined to be 12000 h(-1) and 3%, respectively.
authors.affiliation: Key Laboratory of Educational Ministry for High Efficient Mining and Safety in Metal Mine, University of Science and Technology Beijing, Beijing, China ; Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xing
authors.forename: Chen
authors.initials: C
authors.lastname: Hong
authors.forename: Bei
authors.initials: B
authors.lastname: Cheng
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
mesh_terms: D000641:Ammonia / Q000737:chemistry; D002384:Catalysis; D004785:Environmental Pollutants / Q000737:chemistry* / Q000302:isolation & purification; D008345:Manganese / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D013379:Substrate Specificity; D013696:Temperature; D013997:Time Factors
chemical_list: D004785:Environmental Pollutants; D009589:Nitrogen Oxides; D008345:Manganese; D000641:Ammonia; D010100:Oxygen
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