Dispersion of carbon dioxide bubble release from shallow subsea carbon dioxide storage to seawater. (15th May 2020)

• Record Type: Journal Article
• Authors: Pham, Loi Hoang Huy Phuoc; Rusli, Risza; Shariff, Azmi Mohd; Khan, Faisal
• Is Part Of: Continental shelf research. Volume 196(2020)
• Publication Date: 2020-05-15
• Subjects: CO2 bubble -- Computational fluid dynamics -- Dispersion modelling -- Dissolution -- Chemical reaction -- Consequences; Continental shelf -- Periodicals; Submarine geology -- Periodicals; 551.41
• DOI: 10.1016/j.csr.2020.104075
• Languages: English
• ISSNs: 0278-4343

Abstract

Abstract: A large amount of carbon dioxide (CO2 ) gas injected into shallow reservoirs of carbon capture and storage (CCS) system could be hazardous to marine life if the CO2 released through the seabed. Effective dispersion model is required to assess the realistic exposure as it affects the partial pressure of CO2 and pH of seawater. Here, the development of the dispersion model based on CFD FLUENT that integrates chemical reaction of CO2 bubble in seawater plume is discussed. The capability of the developed model has been demonstrated through a comparison of simulation results with published small-scale field experimental data. Parametric simulation has been conducted to investigate the impact of release rate, current velocity and release size on the dispersion of CO2 gas-seawater. The study confirmed that high release rate in low tide (and low current) condition has the most severe impact. Highlights: Eulerian-Eulerian approach is used to simulate CO2 dispersion in shallow seawater. The approach simulates the chemical reaction between CO2 bubbles and seawater. The PBM model is used to simulate breakup and coalescence between CO2 bubbles. Changes of seawater pH and p CO2 are obtained and validated with experimental data.