Effect of pressure on carbon dioxide induced coal swelling

Reucroft, P. J.; Sethuraman, Anantha R.

doi:10.1021/ef00001a013

Cited by 146 publications

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“…In his study, Reucroft measured with a dilatometer the swelling of different coal samples 1 cm long and 0.4 cm in diameter (Reucroft and Sethuraman 1987). A volume increase ranging from 0.75% to 4.18% was observed when exposing the samples to CO 2 at a pressure of 15 bar.…”

Section: Introductionmentioning

confidence: 99%

Competitive adsorption equilibria of CO2 and CH4 on a dry coal

et al. 2008

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Gases like CO 2 and CH 4 are able to adsorb on the coal surface, but also to dissolve into its structure causing the coal to swell. In this work, the binary adsorption of CO 2 and CH 4 on a dry coal (Sulcis Coal Province, Italy) and its swelling behavior are investigated. The competitive adsorption measurements are performed at 45°C and up to 190 bar for pure CO 2 , CH 4 and four mixtures of molar feed compositions of 20.0, 40.0, 60.0 and 80.0% CO 2 using a gravimetric-chromatographic technique. The results show that carbon dioxide adsorbs more favorably than methane leading to an enrichment of the fluid phase in CH 4 . Coal swelling is determined using a high-pressure view cell, by exposing a coal disc to CO 2 , CH 4 and He at 45 and 60°C and up to 140 bar. For CO 2 and CH 4 a maximum swelling of about 4 and 2% is found, whereas He shows negligible swelling. The presented adsorption and swelling data are then discussed in terms of fundamental, thermodynamic aspects of adsorption and properties which are crucial for an ECBM operation, i.e. the CO 2 storage capacity and the dynamics of the replacement of CH 4 by CO 2 .

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Section: Introductionmentioning

confidence: 99%

Competitive adsorption equilibria of CO2 and CH4 on a dry coal

et al. 2008

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“…For example, the excess adsorption amount of CO 2 can be as high as~2 mmol/g and induce volumetric strains of~2-3% depending on coal total organic content, water content, temperature, pressure, and matrix solid stiffness. The adsorption of these gases induces swelling strains (Ceglarska-Stefanska and Czaplinski, 1993 Ceglarska-Stefanska andZarebska, 2002;Mazumder et al, 2006;Pan and Connell, 2007;Reucroft and Sethuraman, 1987;Levine, 1996;Pini, 2009;Busch and Gensterblum, 2011). At low gas pressure -less than about 10 MPa-adsorption amounts and induced swelling are proportional to gas pressure.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive-mechanical properties of reconstituted granular coal: Experimental characterization and poromechanical modeling

Espinoza

Vandamme

Dangla

et al. 2016

International Journal of Coal Geology

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“…However, large discrepancies were reported between NOM surface areas derived from CO 2 adsorption and N 2 adsorption, primarily because of the activated diffusion phenomenon (Aochi and Farmer, 2005;de Jonge and Mittelmeijer-Hazeleger, 1996;Li and Werth, 2001;Ran et al, 2013;Ravikovitch et al, 2005;Xing and Pignatello, 1997). Carbon dioxide at 273 K and benzene at 295 K have been used as alternative gases for probing the surface properties of carbonaceous materials (Corley et al, 1996;de Jonge and Mittelmeijer-Hazeleger, 1996;Gan et al, 1972;Kwon and Pignatello, 2005;Larsen et al, 1995;Ravikovitch et al, 2005;Reucroft and Sethuraman, 1987;Walker and Kini, 1965;Xing and Pignatello, 1997). Glassy forms of NOM including humin, kerogen and coals have internal microporosity that apparently is not accessed by N 2 at 77 K due to activation diffusion.…”

Section: Introductionmentioning

confidence: 99%

Interaction mechanism of benzene and phenanthrene in condensed organic matter: Importance of adsorption (nanopore-filling)

et al. 2013

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Although microporosity and surface area of natural organic matter (NOM) are crucial to mechanistic evaluation of the sorption process for nonpolar organic contaminants (NOCs), they have wrongly been estimated by the N 2 adsorption technique. Nuclear magnetic resonance spectroscopy ( 13 C NMR), and benzene, carbon dioxide, and nitrogen adsorption techniques were used to characterize structural and surface properties for different condensed NOM samples, which were related to the sorption behavior of phenanthrene (Phen). It was found that the revised Freundlich model by taking the chemical activity into account can well describe the isotherms for benzene and Phen. The benzene and Phen adsorption volumes for the coal samples are similar to or lower than the CO 2 -nanopore volumes. Adsorption volumes of both benzene and Phen are significantly related to the aliphatic carbon structure, and their correlation lines are nearly overlapped, suggesting that the nanopore filling for Phen and benzene on the investigated samples is the dominating mechanism, and also is not affected by water molecules. The entrapment of benzene and/or the pore deformation in the NOM nanopore are likely responsible for the observed hysteresis of benzene. The above results demonstrate that Phen and benzene adsorption on the condensed NOM is closely associated with the aliphatic carbon structure of the investigated samples.

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Effect of pressure on carbon dioxide induced coal swelling

Cited by 146 publications

References 0 publications

Competitive adsorption equilibria of CO2 and CH4 on a dry coal

Competitive adsorption equilibria of CO2 and CH4 on a dry coal

Adsorptive-mechanical properties of reconstituted granular coal: Experimental characterization and poromechanical modeling

Interaction mechanism of benzene and phenanthrene in condensed organic matter: Importance of adsorption (nanopore-filling)

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