scholarly journals X-ray Microradiographic Determination of Diffusion Coefficients within Porous Media Based on Fick's 2nd Law: Theory and Error Analysis

1996 ◽  
Vol 7 (1) ◽  
pp. 49-63 ◽  
Author(s):  
Stephanie E. R. Dowker ◽  
Paul Anderson ◽  
James C. Elliott
Keyword(s):  
Porous Media ◽  
Error Analysis ◽  
Diffusion Coefficients ◽  
X Ray

Determination of gas diffusion coefficients in saturated porous media: He and CH4 diffusion in Boom Clay

2013 ◽  
Vol 83-84 ◽  
pp. 217-223 ◽  
Author(s):  
Elke Jacops ◽  
Geert Volckaert ◽  
Norbert Maes ◽  
Eef Weetjens ◽  
Joan Govaerts
Keyword(s):  
Porous Media ◽  
Diffusion Coefficients ◽  
Gas Diffusion ◽  
Saturated Porous Media ◽  
Boom Clay

X-ray Microtomography Determination of Air−Water Interfacial Area−Water Saturation Relationships in Sandy Porous Media

2008 ◽  
Vol 42 (8) ◽  
pp. 2949-2956 ◽  
Author(s):  
Molly S. Costanza-Robinson ◽  
Katherine H. Harrold ◽  
Ross M. Lieb-Lappen
Keyword(s):  
Porous Media ◽  
Water Saturation ◽  
Interfacial Area ◽  
X Ray

Determination of Diffusion Coefficients with Quantitative X-Ray Microanalysis at High - Spatial Resolution

2012 ◽  
Vol 323-325 ◽  
pp. 61-67 ◽  
Author(s):  
Raynald Gauvin ◽  
Nicolas Brodusch ◽  
Pierre Michaud
Keyword(s):  
Diffusion Coefficient ◽  
Diffusion Coefficients ◽  
Beam Energy ◽  
High Spatial Resolution ◽  
Ratio Method ◽  
Concentration Profiles ◽  
X Ray ◽  
Advantages And Disadvantages ◽  
Scanning Electron

This paper present the determination of concentration profiles of an Mg Al diffusion couple that was obtained with a high resolution field emission scanning electron microscope, the Hitachi SU-8000 equipped with a SDD EDS detector. From these concentration profiles, the inter-diffusion coefficient is determined with the Boltzmann-Matano technique. The advantages and disadvantages of working at high and low beam energy for quantitative x-ray microanalysis are highlighted. The f ratio method is used in this work to convert the x-ray intensities into composition.

Investigation of CO2 Diffusion in Oil-Saturated Porous Media by Using X-Ray Computer-Assisted Tomography

2013 ◽  
Vol 807-809 ◽  
pp. 2498-2502 ◽  
Author(s):  
Ling Yue Tang ◽  
Yu Liu ◽  
Yong Chen Song ◽  
Zi Jian Shen ◽  
Xin Huan Zhou
Keyword(s):  
Porous Media ◽  
Oil Recovery ◽  
Diffusion Coefficients ◽  
Critical Parameter ◽  
Petroleum Industry ◽  
Computer Assisted ◽  
Saturated Porous Media ◽  
X Ray ◽  
Computer Assisted Tomography ◽  
The Relationship

In petroleum industry injection of carbon dioxide has a lot of economical advantages for oil recovery. The diffusion coefficient of CO2 in oil-saturated porous media is a critical parameter. However, there is no universally applicable technique for measuring the diffusion coefficients of gas in oil-saturated porous media. The main objective of this work is to develop a possible experimental method for measuring CO2 diffusion coefficients in oil-saturated porous media by CT technique. At last the relationship between pressure and diffusivity at T= 29 °C is discussed.

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