Study on the Optimized Design of DeSOx Filter Operating at Low Temperature in Diesel Exhaust

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  • Osaka Yugo
    School of Mechanical Engineering, College of Science and Engineering, Kanazawa University
  • Yamada Kohei
    Division of Human and Mechanical Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University
  • Tsujiguchi Takuya
    School of Mechanical Engineering, College of Science and Engineering, Kanazawa University
  • Kodama Akio
    School of Mechanical Engineering, College of Science and Engineering, Kanazawa University
  • Huang Hongyu
    Chinese Academy of Science, Guangzhou Institute of Energy Conversion
  • He Zhaohong
    Chinese Academy of Science, Guangzhou Institute of Energy Conversion

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タイトル別名
  • Study on the Optimized Design of DeSO<sub><i>x</i></sub> Filter Operating at Low Temperature in Diesel Exhaust
  • Study on the optimized design of DeSOx filter operating at low temperature in disel exhaust

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The removal of sulfur dioxide (SO2) contained in the combustion exhaust gas from medium-scale facilities is necessary because of its role as an air pollutant. In this study, we focus on dry DeSOx filters that use simple desulfurization materials to capture SO2; in particular, we used manganese dioxide (MnO2) that takes part in the sulfation (MnO2+SO2→MnSO4). We determined the reactivity of high-surface-area MnO2 (HSSA MnO2) with SO2 using thermogravimetry. We obtained the desulfurization rate for a sample of MnO2 that was wash-coated on a monolith. The MnO2 sample, having a specific surface area of 250 m2/g, absorbed 0.43–0.45 gSO<sub>2</sub>/gMnO<sub>2</sub>. Under this experimental condition, the conversion of the sulfation was dependent on the amount of the supported MnO2. The absorption efficiency of these samples was more than 90.0%. Based on our results, we estimated that 20 m3 of absorbent was required to capture the exhaust gas of an ocean ship with a crossing time of 20 d, operating at 8,500 kW power at 450°C.

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