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| Treatment on Low Concentration SO2 Using Liquid-contained Membrane |
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| DOI：doi：10.3969/j.issn.1007-7545.年份.期号.顺序号 |
| KeyWord:Fiber membrane,Absorption,Low-concentration sulfur dioxide,Citrate solution |
| XUE Juan-qin,WANG Zhao-qi,HONG Tao,LI Lin-bo |
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| Abstract: |
| Low-concentration SO_2 using hydrophobic polypropylene hollow fiber membrane in citrate solution was experimentally explored.Several important factors that may affect the absorption efficiency of SO_2 were examined,namely mode of membrane module operations,the gas flow rates,concentrations and pH of citrate solution.Results of investigation reveal: efficiency is the highest via gas-liquid countercurrent absorption or the absorption efficiency for high concentration SO_2 is not as high as for low one;the absorption efficiency is lowed for higher flow-rate gas;the absorption efficiency is not sensitive to the flow rate of citrate solution in the conditions considered if its concentration is sufficiently high;although the absorption efficiency is higher for higher pH of citrate solution,the optimal pH of citrate solution should be about 4.5 by taking the process of desorption and the choice of buffer capacity into account. |
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