title: Performance of selective catalytic reduction of NO with NH3over natural manganese ore catalysts at low temperature.
abstract: Natural manganese ore catalysts for selective catalytic reduction (SCR) of NO with NH3at low temperature in the presence and absence of SO2and H2O were systematically investigated. The physical and chemical properties of catalysts were characterized by X-ray diffraction, Brunauer-Emmett-Teller (BET) specific surface area, NH3temperature-programmed desorption (NH3-TPD) and NO-TPD methods. The results showed that natural manganese ore from Qingyang of Anhui Province had a good low-temperature activity and N2selectivity, and it could be a novel catalyst in terms of stability, good efficiency, good reusability and lower cost. The NO conversion exceeded 85% between 150°C and 300°C when the initial NO concentration was 1000 ppm. The activity was suppressed by adding H2O (10%) or SO2(100 or 200 ppm), respectively, and its activity could recover while the SO2supply is cut off. The simultaneous addition of H2O and SO2led to the increase of about 100% in SCR activity than bare addition of SO2. The formation of the amorphous MnOx, high concentration of lattice oxygen and surface-adsorbed oxygen groups and a lot of reducible species as well as adsorption of the reactants brought about excellent SCR performance and exhibited good SO2and H2O resistance.
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.|b Institute of Atmospheric Environment and Pollution Control , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Tao
authors.identifier: http://orcid.org/0000-0002-3242-5404
authors.initials: T
authors.lastname: Wang
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.|b Institute of Atmospheric Environment and Pollution Control , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Chengzhu
authors.initials: C
authors.lastname: Zhu
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Haibo
authors.identifier: http://orcid.org/0000-0003-4505-9236
authors.initials: H
authors.lastname: Liu
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.|b Institute of Atmospheric Environment and Pollution Control , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Yongpeng
authors.initials: Y
authors.lastname: Xu
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Xuehua
authors.identifier: http://orcid.org/0000-0003-0687-2005
authors.initials: X
authors.lastname: Zou
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Bin
authors.identifier: http://orcid.org/0000-0002-6694-9038
authors.initials: B
authors.lastname: Xu
authors.affiliation: a School of Resource and Environmental Engineering , Hefei University of Technology , Hefei , People's Republic of China.
authors.forename: Tianhu
authors.initials: T
authors.lastname: Chen
mesh_terms: D000641:Ammonia / Q000737:chemistry*; D002384:Catalysis; D008345:Manganese / Q000737:chemistry; D008956:Models, Chemical; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D013458:Sulfur Dioxide / Q000737:chemistry; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D013458:Sulfur Dioxide; D009569:Nitric Oxide; D008345:Manganese; D000641:Ammonia
keywords: Natural manganese ore; denitration; manganese oxides; nitrogen oxides; selective catalytic reduction