https://scholars.lib.ntu.edu.tw/handle/123456789/546808
標題: | Enhanced performance on simultaneous removal of NO x -SO 2 -CO 2 using a high-gravity rotating packed bed and alkaline wastes towards green process intensification | 作者: | Chen, T.-L. Chen, Y.-H. Chiang, P.-C. PEN-CHI CHIANG |
關鍵字: | Energy consumption; Green process intensification; High-gravity rotating packed bed; Mass transfer; Multiple air pollutants control | 公開日期: | 2020 | 卷: | 393 | 來源出版物: | Chemical Engineering Journal | 摘要: | In order to intensify the gas-liquid absorption processes in the field of energy and environment, high-gravity rotating packed bed (HiGee RPB) has been successfully applied in the multiple air pollutants abatement and CO2 capture by mineralization. Since the mass transfer and chemical reaction through gas-liquid absorption were found to be the key factors affecting acid gas removal, a mass transfer model based on the two-film theory for simultaneous removal of NOx-SO2-CO2 in an RPB was developed in this study. The mass transfer parameters including overall gas-phase mass transfer coefficient (KGa), height of a transfer unit (HTU), liquid mass transfer rate (kL) and enhancement factor (E) were theoretically determined from the experimental data. The effect of key dimensionless operating factors such as high gravity factor (β), gas-to-liquid ratio (GLR), and liquid-to-solid ratio (LSR) on mass transfer parameters were evaluated. Based on the results obtained in this study, the enhancement of high gravity filed on mass transfer and removal efficiencies of NOx and CO2 were significantly higher than that of SO2. It was inferred that the carbonation reaction could compensate the removal efficiency of acid gaseous pollutants at the lower mass transfer rate. The relationship between mass transfer rate and energy consumption for the multiple air pollutant control via a HiGee process was established. The favorable operating factors for NOx-SO2-CO2 simultaneous removal in an RPB were suggested as β of 233.8, GLR of 69.5 and LSR of 40. © 2020 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85081684075&partnerID=40&md5=aa61311c362303052aac17a541007681 https://scholars.lib.ntu.edu.tw/handle/123456789/546808 |
DOI: | 10.1016/j.cej.2020.124678 | SDG/關鍵字: | Air pollution; Air pollution control; Alkalinity; Carbon dioxide; Energy utilization; Fog; Gas absorption; Gases; Gravitation; Liquids; Nitrogen oxides; Packed beds; Process control; Air pollutants; Energy and environment; Gas-phase mass transfer; Green process; Height of a transfer units; Mass transfer modeling; Mass transfer parameters; Rotating packed bed; Mass transfer |
顯示於: | 環境工程學研究所 |
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