Next Article in Journal
Acknowledgement to Reviewers of Processes in 2013
Next Article in Special Issue
Ecological and Economic Assessment of Micro-/Milli-Continuous Campaign Manufacturing: The Case of Writing Ink
Previous Article in Journal
Analysis of Multi-Loop Control Structures of Dividing-Wall Distillation Columns Using a Fundamental Model
Previous Article in Special Issue
Microflow Photochemistry—Photodecarboxylations in Microformats
Article Menu

Export Article

Open AccessArticle
Processes 2014, 2(1), 200-215; doi:10.3390/pr2010200

Absorption and Chemisorption of Small Levitated Single Bubbles in Aqueous Solutions

TU Dortmund University, BCI, Equipment Design, Emil-Figge-Straße 68, D-44227 Dortmund, Germany
*
Author to whom correspondence should be addressed.
Received: 30 November 2013 / Revised: 28 January 2014 / Accepted: 28 January 2014 / Published: 24 February 2014
View Full-Text   |   Download PDF [459 KB, 25 February 2014; original version 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
Figures

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

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

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Processes EISSN 2227-9717 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top