Characterisation of a high concentration ionic bubble column using electrical resistance tomography |
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| Affiliation: | 1. School of Process, Environmental and Materials Engineering, University of Leeds, UK;2. Process and Environmental Engineering Research Division, Faculty of Engineering, University of Nottingham, UK;1. Helmholtz-Zentrum Dresden-Rossendorf;1. School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China;2. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100190, China;3. Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;4. School of Mechanical and Electrical Engineering, Gui Lin University of Electronic Technology, Gui Lin 541004, China;1. Department of Materials, Loughborough University, Loughborough LE3 TU, UK;2. Department of Civil, Chemical, Environmental and Materials Engineering, Università di Bologna, 44121 Bologna, Italy;1. Department of Civil, Chemical, Environmental and Material Engineering, Alma Mater Studiorum – University of Bologna, Via Terracini 28, 40131 Bologna, Italy;2. Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Via Terracini 28, 40131 Bologna, Italy;1. McLanahan Corporation, 200 Wall Street, Hollidaysburg, PA 16648, USA;2. Department of Biosystems and Agricultural Engineering, Michigan State University, 524 S. Shaw Lane, Room 212, East Lansing, MI 48824, USA;1. National Energy Technology Laboratory, 3610 Collins Ferry Road, Morgantown, WV 26507, USA;2. AECOM, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA;1. Department of Animal and Biotechnology Science, College of Animal Science, Kyungpook National University, Sangju, Republic of Korea;2. Department of Horse, Companion and Wild Animal Science, Kyungpook National University, Sangju, Republic of Korea |
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| Abstract: | Attentions has been given to ionic liquids as an alternative physical solvent for carbon dioxide (CO2) absorption because of their potential for gas selectivity, absorption capacity and low desorption energy by tailoring the molecules. Ionic liquid normally have a high viscosity, which influences the performance of absorption processes, and therefore, efficiency. This study investigates the hydrodynamics of ionic liquids in a two-phase gas–liquid flow by determination of the bubble formation, distribution of gas and bubble velocity profiles. A dual plane electrical resistance tomography (ERT) system and an optical imaging device were applied to a bubble column reactor of 50 mm internal diameter for the study. The model ionic liquids were aqueous solutions of sodium chloride (NaCl) with conductivity adjusted by altering the concentration of NaCl. Gas holdup has been estimated by analyses of conductivity data obtained from ERT by application of Maxwell's relationship which reveals significant increase in gas holdup as ionic concentration increases and is in good agreement with other studies. |
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