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离子液体水溶液吸收模拟烟气中SO_2 被引量:1

Absorption of SO_2 in simulated flue gas with aqueous ionic liquid solutions
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摘要 建立了一套放大脱硫装置,利用该装置研究了乙醇胺乳酸盐([MEA]L)水溶液在不同条件下吸收SO2的性能,确定出了较优的实验条件,并在该条件下进行吸收-解吸SO2循环实验。研究结果表明:烟气中SO2的去除率随[MEA]L中水分的增加而增加;SO2的去除率随着气液比的减少而增加,在气液比为420,SO2浓度为2850~14280 mg·m-3范围内时,出口烟气中SO2浓度均小于285 mg·m-3,满足排放标准;烟气中的CO2对[MEA]L水溶液吸收SO2没有影响;利用蒸汽对富液进行解吸再生,解吸后的贫液可以继续使用,并且仍具有很高的SO2去除率。 A large-scale desulfurization device was designed and made to investigate the absorption of SO2 in simulated flue gas with aqueous ethanolamine lactate ([MEA]L) solutions at different conditions. The optimum conditions were found and circulatory SO2 absorption-desorption experiment was performed on the device. The results showed that the SO2 removal rate increased with an increase of water content of aqueous [MEA]L solution. The SO2 removal rate increased with a decrease of the molar ratio of gas to liquid absorbentG/L). WhenG/L is 420 and the concentrations of SO2 in flue gas are 2850-14280 mg·m?3, the output concentration of SO2 was under 285 mg·m?3, which conforms to the standard of flue gas issue. CO2 in the flue gas had no effect on absorption SO2 with aqueous [MEA]L solutions. Furthermore, the solution after SO2 absorption could be regenerated by stream stripping, and reused for absorbing SO2 with a high removal rate.
出处 《化工学报》 EI CAS CSCD 北大核心 2015年第S1期222-227,共6页 CIESC Journal
基金 国家自然科学基金项目(21176020 21306007)~~
关键词 离子液体 乙醇胺乳酸盐 水溶液 吸收 解吸 SO2 ionic liquids ethanolamine lactate aqueous solution absorption desorption SO2
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参考文献17

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