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Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling.

Dewar, Marius; Sellami, Nazmi; Chen, Baixin

Authors

Marius Dewar

Nazmi Sellami

Baixin Chen



Abstract

An oceanic two-phase plume model is developed to include bubble size distribution and bubble interactions, applied to the prediction of CO2 bubble plume and CO2 solution dynamics observed from the recent QICS field experiment in the Scottish sea at Ardmucknish Bay. Observations show bubbles form at between 2 and 12 mm in diameter, where the inclusion of the interactions within the simulations brings results of bubble plumes closer to that of the experiment. Under a given leakage flux, simulations show that the bubble size affects the maximum pCO2 dissolved in the water column, while the bubble interactions affect the vertical bubble distribution. The maximum modelled pCO2 increases from a background 360 μatm to 400, 427 and 443 μatm as CO2 injection rates increase from 80, 170 to 208 kg/day respectively at low tide. An increase of the leakage rate to 100% of the injection rate shows the maximum pCO2 could be 713 μatm, approaching the mean pCO2 observed of 740 μatm during the high leakage component of the experiment, suggesting that the flux may be greater than estimated due to the varied flux and activity across the pockmarks during the leakages.

Citation

DEWAR, M., SELLAMI, N. and CHEN, B. 2015. Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling. International journal of greenhouse gas control [online], 38, pages 52-63. Available from: https://doi.org/10.1016/j.ijggc.2014.11.003

Journal Article Type Article
Acceptance Date Nov 24, 2014
Online Publication Date Nov 27, 2014
Publication Date Jul 31, 2015
Deposit Date Jan 20, 2020
Publicly Available Date Jan 20, 2020
Journal International journal of greenhouse gas control
Print ISSN 1750-5836
Electronic ISSN 1878-0148
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 38
Pages 52-63
DOI https://doi.org/10.1016/j.ijggc.2014.11.003
Keywords Carbon capture and storage; Two-plume modelling; QICS experiment; CO2 leakage; pCO2; Bubble interactions
Public URL https://rgu-repository.worktribe.com/output/819742

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