Ultrasound irradiation for desorption of carbon dioxide gas from aqueous solutions of monoethanolamine

In this study, we investigated the use of ultrasound irradiation to remove CO2 gas from aqueous solutions of monoethanolamine (MEA). The desorption rate of CO2 was measured while MEA solutions were exposed to 28 kHz ultrasound irradiation at 25 degrees C. The results showed that the rate of CO2 desorption from a low-concentration MEA (0.2mol/l) solution is significantly increased by ultrasound irradiation as compared with that of desorption by stirring at a low temperature (25 degrees C). It was also found that decreasing the concentration of MEA solutions increased the rate of CO2 desorption. In addition, we considered the process of desorption of CO2 from MEA solutions according to experimental results. (C) 2014 The Japan Society of Applied Physics