DLVO-based estimates of adsorbed water film thicknesses in geologic CO2 reservoirs

Langmuir : the ACS Journal of Surfaces and Colloids
Tetsu K Tokunaga

Abstract

When supercritical carbon dioxide (scCO(2)) is injected into deep subsurface reservoirs, much of the affected volume consists of pores containing both water and scCO(2), with water films remaining as the mineral-wetting phase. Although water films can affect multiphase flow and mediate reactions at mineral surfaces, little is known about how film thicknesses depend on system properties. Here, the thicknesses of water films were estimated on the basis of considerations of capillary pressure needed for the entry of CO(2) and disjoining pressures in films resulting from van der Waals and electric double-layer interactions. Depth-dependent CO(2) and water properties were used to estimate Hamaker constants for water films on silica and smectite surfaces under CO(2) confinement. Dispersion interactions were combined with approximate solutions to the electric double layer film thickness-pressure relationship in a Derjaguin-Landau-Verwey-Overbeek (DLVO) analysis, with CO(2) as the confining fluid. Under conditions of elevated pressure, temperature, and salinity commonly associated with CO(2) sequestration, adsorbed water films in reservoir rock surfaces are typically predicted to be less than 10 nm in thickness. Decreased surface charg...Continue Reading

References

May 26, 1999·Journal of Colloid and Interface Science·R R Mazzoco, P C Wayner
Feb 19, 2004·Environmental Science & Technology·George H WolfMichael J McKelvy
Feb 24, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Jasper L DicksonKeith P Johnston
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Jun 28, 2011·Environmental Science & Technology·John S LoringAndrew R Felmy
Mar 13, 2012·Environmental Science & Technology·Yongman KimTetsu K Tokunaga

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Citations

Sep 18, 2013·Environmental Science & Technology·Shibo WangAndres F Clarens
Sep 20, 2016·The Journal of Physical Chemistry. B·Felipe Jimenez-Angeles, Abbas Firoozabadi
Oct 25, 2016·Journal of Nanoparticle Research : an Interdisciplinary Forum for Nanoscale Science and Technology·Sulena PradhanInger Odnevall Wallinder
Jan 18, 2018·Proceedings of the National Academy of Sciences of the United States of America·Jiamin WanDonald J DePaolo
Mar 7, 2019·Physical Chemistry Chemical Physics : PCCP·Lijie ZhangYoung-Shin Jun
Jul 27, 2018·Environmental Science & Technology·Lijie Zhang, Young-Shin Jun
Jul 23, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Chao FangRui Qiao
Apr 30, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·B LiangA Clarens
Aug 31, 2021·Nano Letters·An ZouShalabh C Maroo

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