Metal ion catalyzed oxidation of SO2 in the presence of trace H2O2 in aqueous solution under environmental reaction conditions |
| |
| Institution: | 1. Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan;2. Multi-Material Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan;1. Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan;2. Toyobo Co., Ltd., Tsuruga Institute of Biotechnology, 10-24 Toyo-cho, Tsuruga, Fukui 914-8550, Japan;3. Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6-9, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan;1. Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, PR China;2. Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, PR China;3. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan |
| |
| Abstract: | Aqueous phase oxidation of SO2 or S(IV) by H2O2-metal ions at a H2O2 concentration much lower than S(IV), was studied using a continuously flowing stirred reactor. Of the metal ions, Fe2+ showed the highest catalytic activity, i.e. the oxidation of S(IV) continued after most of the H2O2 was consumed. The dependence of the rate on the concentration of S(IV), H2O2, Fe2+ or H+ and temperature was determined. The following rate expression and low apparent activation energy of 40.7 kJ mole−1 were evaluated,−dS(IV)]/dt=620S(IV)]2Fe2+]0.5(molel−1S−1). The significance of this reaction as the sulfate formation in atmospheric water droplets is discussed and a comparison of the rate with others using H2O2, O3 and dissolved O2 catalyzed by metal ions is made. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
