Chinese Journal of Magnetic Resonance >
Diffusion of CO2 in Decane Studied by Magnetic Resonance Imaging
Received date: 2014-05-22
Revised date: 2015-07-28
Online published: 2015-09-05
Supported by
国家自然科学基金资助项目(51206018)，辽宁省博士启动基金资助项目(20121022)
Magnetic resonance imaging (MRI) was used to visualize the diffusion of CO2 in decane, while the pressure was monitored via a double-chamber pressure decay method (PVT). The signal intensities on the MRI images were analyzed to reveal the distribution of dimensionless CO2 content. Based on Fick's law, we computed the diffusion coefficient related to diffusion time and diffusion distance using the finite volume method. The overall average diffusion coefficient can be obtained at any diffusion time. Comparing the overall average diffusion coefficient obtained by the MRI method during diffusion equilibrium time with that obtained by the PVT method showed a 2.7% error. The diffusion coefficient decreased along the diffusing direction, and declined exponentially with time. The overall average diffusion coefficient decreased with the extension of diffusion time. The results obtained in this study were comparable to previous results obtained under similar experimental conditions.
Key words： MRI; diffusion; mass transfer; decane; CO2
HAO Min1 , 2* , ZHAO Yue-chao2 , MAO Yun-feng3 , SONG Yong-chen2 . Diffusion of CO2 in Decane Studied by Magnetic Resonance Imaging[J]. Chinese Journal of Magnetic Resonance, 2015 , 32(3) : 430 -438 . DOI: 10.11938/cjmr20150304
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