发展高效、经济、绿色的SO2吸收剂不但具有较强的学术价值,而且有良好的应用前景。设计并制备了一系列含醚的阴离子功能化离子液体,系统地研究了阴离子上引入醚基团对离子液体SO2吸收容量的影响。结果表明,在阴离子的苯环上引入甲氧基,...发展高效、经济、绿色的SO2吸收剂不但具有较强的学术价值,而且有良好的应用前景。设计并制备了一系列含醚的阴离子功能化离子液体,系统地研究了阴离子上引入醚基团对离子液体SO2吸收容量的影响。结果表明,在阴离子的苯环上引入甲氧基,对离子液体的吸收容量有明显提升。当阳离子为摩尔质量更小的三丁基乙基磷[P4442]时,所得离子液体的吸收容量没有明显下降,20℃、105 Pa SO2下,[P4442][2-CH3OPhCOO]有效吸收量为每摩尔离子液体吸收3.32 mol SO2,有效质量吸收量是每克离子液体吸收0.56 g SO2。六次吸收解吸循环,表明[P4442][2-CH3OPhCOO]可以高效可逆地捕集SO2。基于含醚阴离子功能化离子液体的加强效应进行气体捕集的方法,可进一步应用于分离、催化等领域。展开更多
The absorption of low concentration SO2 in flue gas by using the module of liquid-containing microporous membrane which is made up of hollow fiber and citric acid-sodium citrate buffer solution was investigated.The ab...The absorption of low concentration SO2 in flue gas by using the module of liquid-containing microporous membrane which is made up of hollow fiber and citric acid-sodium citrate buffer solution was investigated.The absorption efficiency of hydrophilic and hydrophobic membranes by using the concept of dynamic contact angle was mainly studied.The influences on absorption efficiency from absorption time,flowrate of gas phase,SO2 concentration of gas phase,air pressure,citrate concentration,pH value of solution as well as the generation of sulfate radical in absorption solution were examined.The results indicate that the hydrophobic hollow fiber membrane is better than hydrophilic membrane,the absorption efficiency decreases with increasing absorption time,gas phase flowrate,gas phase SO2 concentration and air pressure,the absorption rate and capacity of SO2 can be improved by increasing the citrate concentration,the absorption efficiency can be improved by increasing the pH value of citrate solution,the concentration of SO42-in absorption solution increases linearly with the absorption time at a rate around 0.192 g/(L-h).展开更多
文摘发展高效、经济、绿色的SO2吸收剂不但具有较强的学术价值,而且有良好的应用前景。设计并制备了一系列含醚的阴离子功能化离子液体,系统地研究了阴离子上引入醚基团对离子液体SO2吸收容量的影响。结果表明,在阴离子的苯环上引入甲氧基,对离子液体的吸收容量有明显提升。当阳离子为摩尔质量更小的三丁基乙基磷[P4442]时,所得离子液体的吸收容量没有明显下降,20℃、105 Pa SO2下,[P4442][2-CH3OPhCOO]有效吸收量为每摩尔离子液体吸收3.32 mol SO2,有效质量吸收量是每克离子液体吸收0.56 g SO2。六次吸收解吸循环,表明[P4442][2-CH3OPhCOO]可以高效可逆地捕集SO2。基于含醚阴离子功能化离子液体的加强效应进行气体捕集的方法,可进一步应用于分离、催化等领域。
基金Supported by Natural Science Foundation of China (No.50244012)National Science Foundation of Shaanxi Education Department (No.02JC37)
文摘The absorption of low concentration SO2 in flue gas by using the module of liquid-containing microporous membrane which is made up of hollow fiber and citric acid-sodium citrate buffer solution was investigated.The absorption efficiency of hydrophilic and hydrophobic membranes by using the concept of dynamic contact angle was mainly studied.The influences on absorption efficiency from absorption time,flowrate of gas phase,SO2 concentration of gas phase,air pressure,citrate concentration,pH value of solution as well as the generation of sulfate radical in absorption solution were examined.The results indicate that the hydrophobic hollow fiber membrane is better than hydrophilic membrane,the absorption efficiency decreases with increasing absorption time,gas phase flowrate,gas phase SO2 concentration and air pressure,the absorption rate and capacity of SO2 can be improved by increasing the citrate concentration,the absorption efficiency can be improved by increasing the pH value of citrate solution,the concentration of SO42-in absorption solution increases linearly with the absorption time at a rate around 0.192 g/(L-h).
