Overall gas–liquid mass transfer from Taylor bubbles flowing upwards in a circular capillary. Issue 6 (26th April 2013)

• Record Type: Journal Article
• Authors: Mehdi, Shozab; Billet, Anne‐Marie; Chughtai, Imran R.; Inayat, Mansoor H.
• Is Part Of: Asia-Pacific journal of chemical engineering. Volume 8:Issue 6(2013:Nov./Dec.)
• Page Start: 931
• Page End: 939
• Publication Date: 2013-04-26
• Subjects: Chemical engineering -- Periodicals; 660
• DOI: 10.1002/apj.1738
• Languages: English
• ISSNs: 1932-2135

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Overall liquid side volumetric mass transfer coefficient k_La was determined experimentally for cocurrent Taylor flow moving upwards in a glass tube of an internal diameter of 3 mm. Experiments were performed for physical absorption of oxygen in 20% aqueous solution of ethanol. Shadowgraph technique was deployed for precise measurements of bubble lengths and velocities. Experimental values of volumetric mass transfer coefficient k_La were evaluated by use of oxygen sensor and contributions of two possible mass transfer mechanisms: bubble to liquid slug and bubble to liquid film were discussed. Effects of various hydrodynamic parameters such as superficial velocity, length of bubble and slug, and so forth on k_La have also been presented. A correlation has been proposed for the estimation of k_La for a wide range of bubble to slug lengths ratio and superficial velocities of gas and liquids. © 2013 Curtin University of Technology and John Wiley &amp; Sons, Ltd.</p> </abstract>