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为了获得最佳的、重复性较好的超声效应,需要了解和掌握反应过程中超声波的强度及其分布情况,需要对声化学反应器进行功率标定。利用量热法对自制的声化学反应器进行功率标定,探讨溶液高度、初始温度、溶液性质、发生器输出功率对耗散在溶液中的声功率的影响。将超声波引入多元弱酸缓冲溶液体系,应用自制反应器对柠檬酸钠溶液中SO2的解吸过程进行试验研究。结果表明,发生器输出功率和溶液高度对耗散在溶液中的超声波功率起主导作用,发生器输出功率越大,耗散在溶液中的功率也越大,基本呈线性增加,Pdiss=-38.24+0.584Pout,相关系数R=0.9952。应用超声波解吸柠檬酸溶液中的SO2在一定条件下可提高解吸率,但不改变反应机理。
In order to obtain the best and better repeatability ultrasonic effect, it is necessary to understand and master the intensity and distribution of the ultrasonic wave during the reaction, and it is necessary to calibrate the power of the acoustic chemical reactor. The calorimetric method was used to calibrate the power of self-made sonochemical reactors. The effects of solution height, initial temperature, solution properties and generator output power on the acoustic power dissipated in solution were investigated. The ultrasonic wave was introduced into the system of multiple weak acid buffer solution, and the desorption process of SO2 in sodium citrate solution was studied by using homemade reactor. The results show that the generator output power and solution height play a leading role in the ultrasonic power dissipation in solution. The larger the generator output power is, the larger the power dissipated in the solution is, and the linear increase is basically obtained. Pdiss = -38.24 + 0.584Pout, correlation coefficient R = 0.9952. The desorption rate of SO2 in citric acid solution by ultrasonic wave can be increased under certain conditions without changing the reaction mechanism.