Measurement of gas diffusion coefficient in liquid-saturated porous media using magnetic resonance imaging |
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| Authors: | Yongchen Song Min Hao Yuechao Zhao Liang Zhang |
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| Institution: | 1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning Province, 116024, China
2. School of Energy and Power Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning, 110142, China
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| Abstract: | In this study, the dual-chamber pressure decay method and magnetic resonance imaging (MRI) were used to dynamically visualize the gas diffusion process in liquid-saturated porous media, and the relationship of concentration-distance for gas diffusing into liquid-saturated porous media at different times were obtained by MR images quantitative analysis. A non-iterative finite volume method was successfully applied to calculate the local gas diffusion coefficient in liquid-saturated porous media. The results agreed very well with the conventional pressure decay method, thus it demonstrates that the method was feasible of determining the local diffusion coefficient of gas in liquid-saturated porous media at different times during diffusion process. |
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