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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

DIFFUSION COEFFICIENT OF CO2 IN BRINE WITH CONSIDERATION OF SWELLING EFFECT

Get access (open in a dialog) DOI: 10.1615/IHTC16.mtr.022893
pages 5765-5770

要約

Molecular diffusion has been considered to be an underlying mechanism for geological sequestration processes. Reliable estimation of the molecular diffusion coefficient as a transport property is therefore important for CO2 storage in reservoir. Although extensive research on the diffusion of either a gas or a gas mixture into bulk liquid has been conducted, there is no standard and universally applicable technique for measuring the molecular diffusion coefficient. Among the indirect methods, pressure decay method has been widely applied to measure gas diffusivity in heavy oil because of its accuracy and simplicity, though it takes long time to achieve equilibrium state. Fick's diffusion law is generally employed to describe the inherent mass transfer process, whereas the diffusion coefficient is inversely determined by fitting the theoretically calculated parameters to the experimental observations. A generalized technique has been developed to determine the diffusion coefficients of CO2 in brine with consideration of swelling effect.