Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Processes 2014, 2(1), 200-215; doi:10.3390/pr2010200
Article

Absorption and Chemisorption of Small Levitated Single Bubbles in Aqueous Solutions

 and *
Received: 30 November 2013; in revised form: 28 January 2014 / Accepted: 28 January 2014 / Published: 24 February 2014
View Full-Text   |   Download PDF [459 KB, updated 25 February 2014; original version uploaded 24 February 2014]
Abstract: The absorption and chemisorption of small bubbles with N2 or CO2 were investigated experimentally in aqueous and alkaline solutions. Different bubble sizes were studied ranging from 0.1 to 2.5 mm in alkaline concentrations of 0.1 mM to 1 M NaOH. The experiments were conducted in a device consisting of a converging microchannel with a down flowing liquid. Levitation positions of single bubbles were optically characterized. A correlation was developed for the drag force coefficient, CD, including wall effects based on the force equilibrium. A linear decrease of bubble diameters was identified with and without chemical reaction, which is referred to as a rigid bubble surface area. Measured Sherwood numbers agree well with the literature values for the investigated Reynolds number range.
Keywords: mass transfer; levitation; bubble; drag force coefficient; Sherwood number mass transfer; levitation; bubble; drag force coefficient; Sherwood number
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Tollkötter, A.; Kockmann, N. Absorption and Chemisorption of Small Levitated Single Bubbles in Aqueous Solutions. Processes 2014, 2, 200-215.

AMA Style

Tollkötter A, Kockmann N. Absorption and Chemisorption of Small Levitated Single Bubbles in Aqueous Solutions. Processes. 2014; 2(1):200-215.

Chicago/Turabian Style

Tollkötter, Alexander; Kockmann, Norbert. 2014. "Absorption and Chemisorption of Small Levitated Single Bubbles in Aqueous Solutions." Processes 2, no. 1: 200-215.

Processes EISSN 2227-9717 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert