添加剂对超声解吸柠檬酸盐溶液中SO_2的影响  

Effects of Additives on Ultrasonic Desorption of Sulfur Dioxide in Citrate Solution

作　　者：薛娟琴[1] 兰新哲[1] 孟令嫒[1] 李伟达[1] 卢曦[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《过程工程学报》2007年第3期510-513,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50244012);陕西省产业化培育基金资助项目(编号:02JC37)

摘　　要：将超声波作为外场引入柠檬酸钠缓冲溶液中脱除SO2的过程是一项新的尝试.本工作从超声波作用特点及溶液性质出发,探讨了超声解吸柠檬酸钠溶液中SO2的机理以及添加剂(表面活性剂和惰性气体)对解吸过程的影响,并通过实验研究进行了对比性验证.结果表明,十二烷基硫酸钠、十二烷基苯磺酸钠和十二烷基三甲基氯化铵均能显著降低柠檬酸钠溶液的表面张力,添加表面活性剂对超声解吸SO2具有一定的促进作用,其中十二烷基硫酸钠的效果较好;当表面活性剂浓度大于0.1g/L时,溶液表面张力几乎不变,SO2解吸率增加缓慢;在解吸体系中通入少量的惰性气体也能提高超声解吸SO2的效率,解吸率比无惰性气体存在时提高20%.Introducing ultrasonic wave as an external field into the process of desorbing sulfur dioxide in sodium citrate buffer solution is a new approach. In this work, based on the characteristics of ultrasonification and the solution properties, the desorption mechanism of sulfur dioxide and the influence of the additives （surfactants and inert gases） on ultrasonic desorption are investigated. Experiments are performed to verify the analytical results. The results show that lauryl sodium sulfate, sodium dodecyl benzene sulfonate and dodecyl trimethyl ammonium chloride can all significantly reduce the surface tension of sodium citrate solution, thus the desorption efficiency of sulfur dioxide can be improved. Among these three surfactants, lauryl sodium sulfate gives the best effect. However, when the surfactant concentration is over 0.1 g/L, the surface tension of citrate solution can be hardy decreased further and the desorption rate of sulfur dioxide increases very slowly. It is also found that adding inert gases in the desorption system can also increase the desorption efficiency of sulfur dioxide by as much as 20%.

关 键 词：超声波 SO2解吸 添加剂 缓冲溶液 解吸效率 

分 类 号：X511[环境科学与工程—环境工程]