Abstract
Parallel computations are carried out to investigate the effects of impurity on geological storage of carbon dioxide. The CO2 streams captured contain a variety of impurities. It is indicated that impurities in the CO2 streams have an effect on all types of geological storage mechanisms. Dissolution trapping occurs when injected CO2 transported by molecular diffusion dissolves into the formation water. The density of the formation water would increase in response to dissolution of CO2 and cause an instability. In the long term, the downward convection would be triggered and may greatly accelerate dissolution rate of carbon dioxide. This dissolution-diffusion-convection process could increase storage security and permanence. However, nitrogen would lead to a density reduction of the aqueous phase when dissolved in the formation water. The onset of convection would be delayed and the dissolution rate may be affected when co-injecting CO2 with N2.
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Li, D., Jiang, X., Meng, Q., Zhong, X. (2014). Numerical Simulation of the Effects of N 2 on the Solubility Trapping Mechanism of CO 2 . In: Li, K., Xiao, Z., Wang, Y., Du, J., Li, K. (eds) Parallel Computational Fluid Dynamics. ParCFD 2013. Communications in Computer and Information Science, vol 405. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-53962-6_7
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DOI: https://doi.org/10.1007/978-3-642-53962-6_7
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