Sorption of methane in moist coal

Joubert, J.I.; Grein, Clifford T.; Bienstock, Daniel

doi:10.1016/0016-2361(73)90076-8

Cited by 177 publications

(103 citation statements)

References 3 publications

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“…Ultimate analysis specifies the elements of carbon, hydrogen, nitrogen, oxygen and sulphur Joubert et al 1973;Nandi and Walker 1975;Nelson et al 1980;Reucroft and Yang and Saunders 1985;Reucroft and Patel 1986;Banerjee 1988;Giuliani et al 1991;DeGance et al 1993;Chaback et al 1996;Fitzgerald et al 2005;Chang et al 2006;Qin et al 2007;Siemons et al 2007;Chang et al 2008;Majewska et al 2009;Radliński et al 2009;Pone et al 2009;Battistutta et al 2010;Gensterblum et al 2010;Kim et al 2011;Hao et al 2012Hao et al , 2013Lin et al 2013). Widely-used indexes for ultimate analysis are: dry ash-free basis, air dried basis.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 6 show that moisture in coal decreases with the coal rank, and the functional relationship between inherent moisture M ad and vitrinite reflectance R o;max is shown in Eq. (19): Chang et al 2006;Qin et al 2007;Chang et al 2008;Chen et al 2010;Hao et al 2012;Zheng 2012;Jiang et al 2012;Gao 2012;Lin et al 2013;Xiao et al 2016)-135, English, (Mahajan and Walker 1971;Joubert et al 1973;Yalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Nodzeński 1998;Wang 2012)-171) where M ad is air dried basis inherent moisture, %; k mad , c mad , b mad are coefficients of Eq. (19), and c mad \0,…”

Section: Moister Content Effect On Adsorption Capacitymentioning

confidence: 99%

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Effects of coal rank on physicochemical properties of coal and on methane adsorption

Cheng

Jiang

Zhang

et al. 2017

Int J Coal Sci Technol

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For the thorough research on coal metamorphism impact on gas adsorption capacity, this paper collected and summarized parameters of experimental adsorption isotherms, coal maceral, proximate analysis and ultimate analysis obtained from National Engineering Research Center of Coal Gas Control and related literatures at home and abroad, systematically discussed the coal rank effect on its physicochemical properties and methane adsorption capacity, in which the coal rank was shown in Vitrinite reflectance, furthermore, obtained the Semi-quantitative relationship between physicochemical properties of coal and methane adsorption capacity.

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Section: Methodsmentioning

confidence: 99%

Section: Moister Content Effect On Adsorption Capacitymentioning

confidence: 99%

Effects of coal rank on physicochemical properties of coal and on methane adsorption

Cheng

Jiang

Zhang

et al. 2017

Int J Coal Sci Technol

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“…Tests were performed to determine the sorption capacity with the respect to water vapour. From the CO2 capture point of view, it appears to be very important because the presence of moisture in coal sometimes causes a significant reduction in the sorption capacity of coal regarding gases (methane and carbon) [15][16][17]. Therefore, quantitative analysis determining the water vapour sorption on coal allow us to evaluate the sample in terms of chemical nature, as well as for potential storage center.…”

Section: Discussionmentioning

confidence: 99%

Sequestration of carbon dioxide – influence of coal surface chemistry

et al. 2016

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Abstract. The physical gas adsorption is a widely used method for the characterisation of the solids porosity. The water steam, primarilydue to its physicochemical properties and ease of use in the experiment has great potential as a sorbate. When applied to coal, water steam allows to determine the quantity of primary adsorption centers as measurement of interaction of molecules adsorbed to the surface of the adsorbent. In order to determine the adsorption capacity and the chemical nature of the coal surface, adsorption / desorption of water vapour to the selected coals was examined at 303K, using a volumetric method. The presence of water in the coal may affect on the sorption properties of other molecules. The analysis of the results show that the coals of low rank and a high content of oxygen functional groups, which are the active sites, showed a greater affinity to absorbing water molecules. Adsorption isotherms were compiled through approximating the Langmuir and BET linear equation to measurement data. Based on the adsorption equation, the amount of adsorption centers have been specified, which can potentially be involved in the adsorption of CO 2 during the injection of gas into the coal seams.

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“…Additional water does not further reduce the ability to store these gases. As little as 1.4% moisture reduced the methane capacity for a sample from the Pocahontas seam by 26.5% 24 . As little as 0.1%, increase (0.54 % to 0.63%) decreased CO 2 capacity 14% 23 .…”

Section: Role Of Moisturementioning

confidence: 94%

“…To better define the influence of moisture on capacity reduction, the appropriate moisture content of 0.65% 25 as received was added to the coal model. Sixty-six water molecules were manually placed close to (2 Å) oxygen atom, as it is expected that the water is associated with the oxygen functionality of the coal 24 . Fifty-eight percent of the oxygen atoms in the coal are associated with a water molecule.…”

Section: Role Of Moisturementioning

confidence: 99%

Use of molecular modeling to determine the interaction and competition of gases within coal for carbon dioxide sequestration

Evanseck¹,

Madura²,

Mathews³

2006

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Molecular modeling was employed to both visualize and probe our understanding of carbon dioxide sequestration within a bituminous coal. A large-scale (>20,000 atoms) 3D molecular representation of Pocahontas No. 3 coal was generated. This model was constructed based on a the review data of Stock and Muntean 1 , oxidation and decarboxylation data for aromatic clustersize frequency of Stock and Obeng 2 , and the combination of Laser Desorption Mass Spectrometry data with HRTEM 3 , enabled the inclusion of a molecular weight distribution. The model contains 21,931 atoms, with a molecular mass of 174,873 amu, and an average molecular weight of 714 amu, with 201 structural components. The structure was evaluated based on several characteristics to ensure a reasonable constitution (chemical and physical representation). The helium density of Pocahontas No. 3 coal is 1.34 g/cm 3 (dmmf) 4 and the model was 1.27 g/cm 3 . The structure is microporous, with a pore volume comprising 34% of the volume as expected for a coal of this rank. The representation was used to visualize CO 2 , and CH 4 capacity, and the role of moisture in swelling and CO 2 , and CH 4 capacity reduction. Inclusion of 0.68% moisture by mass (ash-free) enabled the model to swell by 1.2% (volume). Inclusion of CO 2 enabled volumetric swelling of 4%.

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Sorption of methane in moist coal

Cited by 177 publications

References 3 publications

Effects of coal rank on physicochemical properties of coal and on methane adsorption

Effects of coal rank on physicochemical properties of coal and on methane adsorption

Sequestration of carbon dioxide – influence of coal surface chemistry

Use of molecular modeling to determine the interaction and competition of gases within coal for carbon dioxide sequestration

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