TY - GEN
T1 - A rapid method for prediction of convective-diffusive mass transfer during CO2 storage in saline aquifers
AU - Nazari Moghaddam, R.
AU - Pourafshary, P.
N1 - Publisher Copyright:
Copyright © (2012) by the European Association of Geoscientists & Engineers All rights reserved.
PY - 2013
Y1 - 2013
N2 - CO2 storage in deep saline aquifers has been suggested as a way of reducing greenhouse gas emissions. Correct estimation of dissolution rate is important because the time scale for dissolution corresponds to the time scale over which free phase CO2 has a chance to leak out. However, for this estimation, an expensive and time consuming simulation based on the convection-diffusion equation must be performed. In this paper, a new model for rapid determination of dissolution rate for convection-diffusion mechanism is proposed. It is used to account the rate of mass transferring in porous media during CO2 storage. For this purpose, a new diffusion equation was developed based on the pseudo diffusion coefficient of the system. Experimental tests were conducted in porous media to evaluate the pseudo diffusion coefficient of the system. It is shown that this coefficient can be approximated by a relationship for the Rayleigh number of the system. The fraction of ultimate dissolution, as a result of the proposed model, is calculated for each test and compared with the experimental data to verify the reliability of proposed method.
AB - CO2 storage in deep saline aquifers has been suggested as a way of reducing greenhouse gas emissions. Correct estimation of dissolution rate is important because the time scale for dissolution corresponds to the time scale over which free phase CO2 has a chance to leak out. However, for this estimation, an expensive and time consuming simulation based on the convection-diffusion equation must be performed. In this paper, a new model for rapid determination of dissolution rate for convection-diffusion mechanism is proposed. It is used to account the rate of mass transferring in porous media during CO2 storage. For this purpose, a new diffusion equation was developed based on the pseudo diffusion coefficient of the system. Experimental tests were conducted in porous media to evaluate the pseudo diffusion coefficient of the system. It is shown that this coefficient can be approximated by a relationship for the Rayleigh number of the system. The fraction of ultimate dissolution, as a result of the proposed model, is calculated for each test and compared with the experimental data to verify the reliability of proposed method.
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M3 - Conference contribution
AN - SCOPUS:84930466455
T3 - 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 Incorporating SPE EUROPEC 2013: Changing Frontiers
SP - 3269
EP - 3273
BT - 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 Incorporating SPE EUROPEC 2013
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 Incorporating SPE EUROPEC 2013: Changing Frontiers
Y2 - 10 June 2013 through 13 June 2013
ER -