High frequency ultrasonic-assisted CO2 absorption in a high pressure water batch system |
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| Institution: | 1. Department of Chemistry, Payame Noor University, 19395-3697 Tehran, Iran;2. Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran;1. Key Laboratory of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, People’s Republic of China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, People’s Republic of China;3. State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, People’s Republic of China;4. National Engineering Research Center of Urban Water Resource and Environment, Harbin 150090, People’s Republic of China;5. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, People’s Republic of China;1. Department of Chemical Engineering, Shiraz University, Shiraz, 71345, Iran;2. Department of Chemistry, Shiraz University of Technology, Shiraz, 71555-313, Iran;1. Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;2. Microelectronics-Photonics Program, University of Arkansas, Fayetteville, AR, USA;3. Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville AR, USA;4. UTINAM UMR 6213 CNRS, Université Bourgogne Franche-Comté, Besançon, France;1. Department of Chemical Engineering, School of Engineering, University of Mississippi, 134 Anderson Hall, MS 38677-1848, USA;2. Department of Chemistry and Biochemistry, University of Mississippi, Coulter Hall, MS 38677, USA;3. Interdisciplinary Center for Nanotoxicity, Jackson State University, 1400 J. R. Lynch Street, Jackson, MS 39217, USA;4. Environmental Resources Engineering Department, College of Environmental Science and Forestry (ESF), 206 Bray Hall, Syracuse, NY 13210, USA |
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| Abstract: | Physical absorption process is always nullified by the presence of cavitation under low frequency ultrasonic irradiation. In the present study, high frequency ultrasonic of 1.7 MHz was used for the physical absorption of CO2 in a water batch system under elevated pressure. The parameters including ultrasonic power and initial feed pressure for the system have been varied from 0 to 18 W and 6 to 41 bar, respectively. The mass transfer coefficient has been determined via the dynamic pressure-step method. Besides, the actual ultrasonic power that transmitted to the liquid was measured based on calorimetric method prior to the absorption study. Subsequently, desorption study was conducted as a comparison with the absorption process. The mechanism for the ultrasonic assisted absorption has also been discussed. Based on the results, the mass transfer coefficient has increased with the increasing of ultrasonic power. It means that, the presence of streaming effect and the formation of liquid fountain is more favorable under high frequency ultrasonic irradiation for the absorption process. Therefore, high frequency ultrasonic irradiation is suggested to be one of the potential alternatives for the gas separation process with its promising absorption enhancement and compact design. |
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| Keywords: | Ultrasonic enhancement Absorption Desorption Gas–liquid transfer High frequency |
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