| Title: | Concurrent catalytic removal of typical volatile organic compound mixtures over Au-Pd/alpha-MnO(2) nanotubes |
| Author(s): | Xia Y; Xia L; Liu Y; Yang T; Deng J; Dai H; |
| Address: | "College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China; Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China. Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China. Mechanical Engineering Department, University of Aveiro, 3810-193 Aveiro, Portugal. Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China. Electronic address: jgdeng@bjut.edu.cn" |
| DOI: | 10.1016/j.jes.2017.06.025 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "alpha-MnO(2) nanotubes and their supported Au-Pd alloy nanocatalysts were prepared using hydrothermal and polyvinyl alcohol-protected reduction methods, respectively. Their catalytic activity for the oxidation of toluene/m-xylene, acetone/ethyl acetate, acetone/m-xylene and ethyl acetate/m-xylene mixtures was evaluated. It was found that the interaction between Au-Pd alloy nanoparticles and alpha-MnO(2) nanotubes significantly improved the reactivity of lattice oxygen, and the 0.91wt.% Au(0.48)Pd/alpha-MnO(2) nanotube catalyst outperformed the alpha-MnO(2) nanotube catalyst in the oxidation of toluene, m-xylene, ethyl acetate and acetone. Over the 0.91wt.% Au(0.48)Pd/alpha-MnO(2) nanotube catalyst, (i) toluene oxidation was greatly inhibited in the toluene/m-xylene mixture, while m-xylene oxidation was not influenced; (ii) acetone and ethyl acetate oxidation suffered a minor impact in the acetone/ethyl acetate mixture; and (iii) m-xylene oxidation was enhanced whereas the oxidation of the oxygenated VOCs (volatile organic compounds) was suppressed in the acetone/m-xylene or ethyl acetate/m-xylene mixtures. The competitive adsorption of these typical VOCs on the catalyst surface induced an inhibitive effect on their oxidation, and increasing the temperature favored the oxidation of the VOCs. The mixed VOCs could be completely oxidized into CO(2) and H(2)O below 320 degrees C at a space velocity of 40,000mL/(g.hr). The 0.91wt.% Au(0.48)Pd/alpha-MnO(2) nanotube catalyst exhibited high catalytic stability as well as good tolerance to water vapor and CO(2) in the oxidation of the VOC mixtures. Thus, the alpha-MnO(2) nanotube-supported noble metal alloy catalysts hold promise for the efficient elimination of VOC mixtures" |
| Keywords: | "Catalysis Gold/chemistry Manganese Compounds/chemistry *Models, Chemical Nanotubes/*chemistry Oxides/chemistry Palladium/chemistry Volatile Organic Compounds/*chemistry Catalytic oxidation Competitive adsorption Manganese dioxide nanotubes Supported gold-;" |
| Notes: | "MedlineXia, Yunsheng Xia, Lu Liu, Yuxi Yang, Tao Deng, Jiguang Dai, Hongxing eng Netherlands 2018/02/27 J Environ Sci (China). 2018 Feb; 64:276-288. doi: 10.1016/j.jes.2017.06.025. Epub 2017 Jun 30" |
