Oxidative decomposition of formaldehyde by metal oxides at room temperature |
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| Institution: | 1. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;2. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;1. School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;2. Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China;3. Innovation Center for Metal Resources Utilization and Environment Protection, Guangxi University, Nanning 530004, China;1. Dipartimento di Chimica, Fisica e Ambiente, Università di Udine, via del Cotonificio 108, 33100 Udine, Italy;2. Institut de Tècniques Energètiques and Centre for Research in Nanoengineering, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China;2. University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, PR China;3. Corning Research Center China, 200 Jinsu Road, Shanghai 201206, PR China;1. School of Food Science and Engineering, South China University of Technology, Guangzhou 510630, China;2. School of Biomedical and Phamaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China;3. College of Environment and Energy, South China of University of Technology, Guangzhou 510006, China;1. School of Environmental Science and Engineering, Sun Yat-Sen University, China;2. Guangdong-Hong Kong Joint Research Center for Air Pollution Control, China;3. Department of Mechanical Engineering, University of Hong Kong, Hong Kong |
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| Abstract: | Formaldehyde (HCHO) is still a major indoor air pollutant in Japanese air-tight houses and is the subject of numerous complaints regarding health disorders. Authors have developed a passive-type air-cleaning material and an air cleaner using manganese oxide (77% MnO2) as an active component and successfully reduced indoor HCHO concentrations in newly built multi-family houses. In this study, the reactivity between manganese oxide and HCHO was discussed. We tested the removal efficiencies of several metal oxides for HCHO in a static reaction vessel and found manganese oxide could react with HCHO and release carbon dioxide even at room temperature. The reactivity and mechanisms were discussed for the proposed chemical reactions. A mass balance study proved that a major product through the heterogeneous reaction between manganese oxide and HCHO was carbon dioxide. Harmful by-products (HCOOH and CO) were not found. |
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