Low temperature selective catalytic reduction of NOx with NH3 over amorphous MnOx catalysts prepared by three methods |
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| Affiliation: | 1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China;2. The Institute for Chemical Physics, Beijing Institute of Technology, Beijing 100081, China;1. Dipartimento di Energia, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy;2. Jagiellonian University, Faculty of Chemistry, Environmental Technology Research Group, Poland;3. ENEL Ingegneria e Ricerca SpA, Via Pisano 120-56122 Pisa, Italy;1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China;2. Zhejiang Tianlan Environmental Protection Technology Co. Ltd, Hangzhou 311202, PR China;3. Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, PR China;1. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China;2. College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, PR China;3. Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing 210093, PR China;4. Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China;1. College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, PR China;2. Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Center of Modern Analysis, Nanjing University, Nanjing 210093, PR China;3. College of Chemistry and Chemical Engineering, Taishan University, Taian 271021, PR China;1. Research Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Fangzheng Avenue 266#, Chongqing 400714, PR China;2. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China;3. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China;4. Yangtze Normal University, Chongqing 408100, PR China |
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| Abstract: | Unsupported manganese oxide catalysts with amorphous phase were prepared by three methods, and their activities for SCR of NOx with ammonia were investigated in the presence of O2. The results showed the catalysts have superior low temperature activity, and the NOx conversion is about 98% at 80 °C, and nearly 100% NOx conversion between 100 and 150 °C. Due to competing adsorption with the reactant, H2O has slight impact on the activity. The activity was suppressed with coexisting of SO2, however the deactivation of SO2 is reversible. The excellent low temperature catalytic activity of amorphous MnOx catalysts is mainly due to their amorphous phase and high specific areas. |
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