A Novel Method for Analyzing Pore Size Distribution of Complex Geometry Shaped Porous Shale

Abstract:

This article proposes the differential BJH equation based on the principles of multilayer adsorption and capillary condensation, which was simplified by theoretical investigation and experiments. This work indicates that the differential function of isotherm and the differential function of pore size to relative pressure determine the pore size distribution of porous media. The differential BJH model can be used to explain the source of the false peak in pore size distribution and to calculate the pore size distribution of different shapes of pores in a porous media with a porous structure. It has an excellent application prospect in the characterization of complex pore structure represented by shale.

• Periodical: Materials Science Forum (Volume 1003)
• Pages: 134-143
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1003.134
• Online since: July 2020
• Authors: Yang Ming, Lin Mian*
• Keywords: Adsorption, BJH, Capillary Condensation, Cylinder Pore, False Peak, Pore Size Distribution, Slit Pore

References

[1] Barrett E P, Joyner L G, Halenda P P. The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms [J]. Journal of the American Chemical Society, 1951, 73(1): 373-80.

DOI: 10.1021/ja01145a126

[2] Liu W, Cui S, Wang Z, Ding B. Research progress of adsorption materials for gas hydrate production by displacement method. Modern Chemical Industry, 2019, 39(11): 53-57.

[3] Yang F, Ning Z F, Zhang S D, et al. Characterization of pore structures in shales through nitrogen adsorption experiment. Natural Gas Industry, 2013, 33(04): 135-140.

[4] Kuila U, Prasad M. Specific surface area and pore-size distribution in clays and shales [J]. Geophysical Prospecting, 2013, 61(2): 341-362.

DOI: 10.1111/1365-2478.12028

[5] Silvestre-Albero A M, Juarez-Galan J M, Silvestre-Albero J, et al. Low-Pressure Hysteresis in Adsorption: An Artifact? [J]. Journal of Physical Chemistry C, 2012, 116(31): 16652-16655.

DOI: 10.1021/jp305358y

[6] Cohan L H. Sorption Hysteresis and the Vapor Pressure of Concave Surfaces [J]. Journal of the American Chemical Society, 1938, 60(2): 433-435.

DOI: 10.1021/ja01269a058

[7] Shull C G. The Determination Of Pore Size Distribution From Gas Adsorption Data [J]. Journal of the American Chemical Society, 1948, 70(4): 1405-1410.

DOI: 10.1021/ja01184a034

[8] Boer J H D. The dynamical character of adsorption [J]. Soil Science, 1953, 76(76): 166.

[9] D. H G. Physical Adsorption of Gases [J]. Journal of the American Chemical Society, 1969, 235(1): 1214-1225.

[10] Melrose J C. Thermodynamic Aspects Of Capillarity [J]. Industrial & Engineering Chemistry, 1968, 60(3): 53-70.

[11] Kruk M, Jaroniec M, Sayari A. Application of Large Pore MCM-41 Molecular Sieves To Improve Pore Size Analysis Using Nitrogen Adsorption Measurements [J]. Langmuir, 1997, 13(23): 6267-6273.

DOI: 10.1021/la970776m

[12] Dollimore D, Heal G R. Pore-size distribution in typical adsorbent systems [J]. Journal of Colloid and Interface Science, 1970, 33(4): 508-519.

DOI: 10.1016/0021-9797(70)90002-0

[13] Horikawa T, Do D D, Nicholson D. Capillary condensation of adsorbates in porous materials [J]. Advances in Colloid and Interface Science, 2011, 169(1): 40 - 58.

DOI: 10.1016/j.cis.2011.08.003

[14] Groen J C, Peffer L A A, Perez-Ramirez J. Pore size determination in modified micro- and mesoporous materials. Pitfalls and limitations in gas adsorption data analysis [J]. Microporous and Mesoporous Materials, 2003, 60(1-3): 1-17.

DOI: 10.1016/s1387-1811(03)00339-1

[15] Horvath G, Kawazoe K. Method for the calculation effective pore size distribution in molecular sieve of carbon [J]. Jounal of Chemical Engineering of Japan, 1983, 16(6): 470-475.

DOI: 10.1252/jcej.16.470