Detailed experimental study on the dissolution of CO2 and air bubbles rising in water

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Daniel Legendre, Ron Zevenhoven
Publisher: Elsevier
Publication year: 2017
Journal: Chemical Engineering Science
Journal acronym: CES
Volume number: 158
Start page: 552
End page: 560
eISSN: 1873-4405


Abstract

An experimental investigation of single bubbles rising in water in a confined cylindrical geometry is performed as means of obtaining further understanding on the CO2 dissolution and chemical conversion in multi-phase bubble towers. Single isolated bubbles (D~ 4,5– 5,5 mm) and individual bubble tracking in small bubble swarms at low gas volume fraction is evaluated using a high-speed camera. Comparison with dissolution rate of air and CO2 bubbles reveals hardly a diameter change for air bubbles, in contrast with near-total dissolution of CO2 bubbles within the 2 m column height. Comparison with 1D numerical analysis on single rising bubbles and previous 3D CFD simulations of small bubble swarms show a fair agreement although certain deviations are encountered. Only CO2 bubbles decrease their aspect ratio from wobbling ellipsoidal bubbles to spherical bubbles depending on their vertical location in the tower, i.e. their size. The amplitude of oscillation is decreased while bubbles dissolve.

Last updated on 2019-20-04 at 04:24