Gas-induced swelling in coal
WebNov 17, 2024 · 3.1 Gas adsorption-induced coal deformation Coal swelling/shrinkage induced by gas adsorption/desorption is a well-accepted phenomenon (Reucroft and Patel 1986; Levine 1996; Durucan et al. 2009; Battistutta et al. 2010; Zhu et al. 2013 b, 2024; Wang et al. 2024a, b ). WebOct 13, 2024 · The results show that the coal adsorption capacity in CO2 is almost two times greater than that in CH4, and nitrogen adsorption is the least among these gases. …
Gas-induced swelling in coal
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WebOct 30, 2024 · As gas desorbs, the coal matrix shrinks and swells with adsorption. The result in shrinkage or swelling is called sorption-induced strain. The reservoir pressure leads to gas desorption... WebMay 4, 2024 · In this study, an investigation of carbon dioxide sorption induced coal swelling and its effects on gas transport in coal is shown. The model presented is …
WebNarkiewicz and Mathews (2009) calculated the CO 2 -induced swelling of coal via MD and proposed that the anisotropic swelling was greater perpendicular to the bedding plane. The deformation of coal induced by CH 4 adsorption was also quantified via the quenched solid density functional theory (QSDFT) and clarified the adsorption-induced ... WebApr 6, 2024 · Under subsurface conditions, the injected CO 2 is partly present as a free phase and partly immobilised by adsorption to the coal matrix, what causes coal swelling. The adsorption-induced swelling of the coal matrix constricts the fluid flow pathways, leading to a reduction in permeability, and can result in a considerable loss of injectivity ...
WebSep 26, 2024 · To date, many laboratory studies of gas-induced swelling in coal have used dry material or samples in which the moisture content was not closely controlled. Therefore, it is necessary to understand the swelling and shrinkage characteristics of coal under moisture-saturated conditions. WebMar 1, 2007 · The model is tested by application to published experimental measurements of gas adsorption-induced coal swelling. 2. Model development. A porous body dilates …
WebDec 1, 2010 · In order to investigate the unique mechanical behavior of swelling deformation effect of coal induced by gas adsorption, the self-developed meso …
WebMar 1, 2011 · Coal swelling induced by gas adsorption is a well-known phenomenon. In order to enhance coalbed methane production and greenhouse gases sequestration, adsorption phase should be understood deeply ... high level of b12 and anemiaWebOct 9, 2007 · Less coal swelling would be favorable for acid gas sequestration with less permeability reduction. However, coals with smaller Langmuir volume have less capacity … high level of cholesterolWebAug 28, 2016 · Furthermore, fracturing of the mineral phase (embedded in the coal) was observed; this fracturing was induced by the internal swelling stress. We conclude that coal permeability is drastically … high level of b12 in blood workWebAbstract Coal permeability measurements are normally conducted under the assumption that gas pressure in the matrix is equalized with that in fracture and that gas sorption-induced swelling/shrinking strain is uniformly distributed within the coal.However,the validity of this assumption has long been questioned and differential strain between ... high level of chlorine in bloodWebDec 1, 2010 · In order to investigate the unique mechanical behavior of swelling deformation effect of coal induced by gas adsorption, the self-developed meso-mechanical testing apparatus of coal... high level of bilirubinWebOne of the initial study related to the CO2 adsorption induced swelling effect in coal and shows that super-critical CO2 creates higher swelling … high level of co2WebFeb 10, 2024 · Due to the lack of data in the literature, this article discusses the sorption-induced swelling properties of hard coal in a methane and carbon dioxide atmosphere. ... A Theoretical Model for Coal Swelling Induced by Gas Adsorption in the Full Pressure Range. Adsorpt. Sci. Technol. 2024, 38, 94–112. high level of co2 in blood