Sorption and desorption of gases (CH4, CO2) on hard coal and active carbon at elevated pressures

Nodzeński, Adam

doi:10.1016/s0016-2361(98)00022-2

Cited by 96 publications

(57 citation statements)

References 6 publications

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“…(25) exhibits up-convex, power-decreasing type, it can be concluded that Fixed carbon increases with the increase of coal rank, and at low metamorphic stage, Fixed carbon content increases greatly. Figure 8 shows that with the increase of coal rank, the fixed carbon content exists the upper and lower curves Chang et al 2006;Qin et al 2007;Chang et al 2008;Hao et al 2012;Zheng 2012;Gao 2012;Jiang et al 2012;Lin et al 2013;Xiao et al 2016)-268, English, (Mahajan and Walker 1971;Joubert et al 1973;Yalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Nodzeński 1998;Hildenbrand et al 2006;Faiz et al 2007a, b;Yu et al 2008a, b, c;Gensterblum et al 2010;Taraba 2011;Wang 2012)-297) expressed in the following equations:Fc ad;max ¼ 92:3433À 88:918 expðÀ1:7628R o;max Þ and Fc ad;min ¼ 73:01726À 273:61127 expðÀ0:9814R o;max Þ, The corresponding average curve is as follow: Fc ad;avr ¼ 82:57758 À 162:60685 expðÀ1:03532R o;max Þ,besides, The ranges of fixed carbon content in subbituminous coal are from 2% to 56%, in low volatile bituminous coal are from 18% to 70%, in mid volatile bituminous coal are from 18% to 85%, in high volatile bituminous coal are from 21% to 92%, in anthracite are from 50% to 95%.…”

Section: Fixed Carbon Content Effect On Adsorption Capacitymentioning

confidence: 97%

“…Figure 3 shows that Q daf for the Lignite/subbituminous is between 0 and 8 m 3 /t, for low volatile bituminous is between 3 and 24 m 3 /t, for middle volatile bituminous is between 5 and 29 m 3 /t, for high volatile bituminous is between 6 and 36 m 3 /t and for semi-anthracite/anthracite is between 8 and 30 m 3 /t. The variation range is between the upper and lower curves represented in the equations of Q daf;max ¼ À4:9549R (Zhang and Yang 1999;Fu et al 2002;Zhang et al 2004;Fu et al 2005;Su et al 2005;Su et al 2006;Chen et al 2008;Fu et al 2008;Zhang and Sang 2008;Wang et al 2008;Yu et al 2008a;Chen et al 2008;Jiang 2009;Zhang and Sang 2009;Yang et al 2009;Ren 2010;Tian et al 2010;Zhang et al 2011;Zhang Jun-fan and Liang Wen-qing 2011;Zheng 2012;Gao 2012;Ma et al 2014;Zhang et al 2014)-173; English Yalçin and Durucan 1991;Beamish and O'Donnell 1992;DeGance et al 1993;Chaback et al 1996;Nodzeński 1998;Faiz et al 2007a, b;Yu et al 2008a, b, c;Xiao and Wang 2011)-103) (Zhang and Yang 1999;Su et al 2006;Ma et al 2008;Yang et al 2009;Tian et al 2010;Zheng 2012;…”

Section: Coal Rank Effect On Adsorption Q Dafmentioning

confidence: 99%

“…Figure 5 shows the relationship between Dry ash-free basis volatile V daf and Vitrinite reflectance R o;max expressed in Eq. (13): (Yu et al 2005;Zhang 2007;Zheng 2012;Zou et al 2013;Liu et al 2015;Yue et al 2016)-217, English Yalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Nodzeński 1998;Yu et al 2008a, b, c)-153) Ma et al 2008;Jiang 2009;Tian et al 2010;Zhang et al 2011;Zheng 2012;Gao 2012;Ma et al 2014;Xu and Pan 2015)-117, English Yalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Nodzeński 1998;Yu et al 2008a, b, c)-153) Effects of coal rank on physicochemical properties of coal and on methane adsorption 133…”

Section: Volatile Content Effect On Adsorption Capacitymentioning

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: Fixed Carbon Content Effect On Adsorption Capacitymentioning

confidence: 97%

Section: Coal Rank Effect On Adsorption Q Dafmentioning

confidence: 99%

Section: Volatile Content Effect On Adsorption Capacitymentioning

confidence: 99%

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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“…In the literature, there have been several studies examining the adsorption heat accompanying adsorption process. Nodzeński [21] calculated the isosteric heats of sorption methane and carbon dioxide on hard coal using the thermal sorption equation of the virial form. Bülow et al [22] introduced the method for calculating the isosteric adsorption heat using the Clausius-Clapeyron equation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Maceral Compositions of Coal on Methane Adsorption Heat

et al. 2018

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The role of maceral compositions (vitrinite and inertinite) in the adsorption characteristics of coal has not been fully understood in terms of energy. In this study, using a microcalorimeter, the adsorption heat of maceral compositions for methane is directly measured for five groups of Chinese coal samples with different coal ranks. The results show that the adsorption heat of the maceral concentrates varies with increasing coal rank, but for the same coal sample, the vitrinite concentrates have a higher adsorption heat than the inertinite concentrates. Furthermore, the adsorption heat of both vitrinite and inertinite concentrates is highest at the long-flame coal stage. This finding indicates that the coalification and maceral compositions have significant effects on the adsorption heat of coal for methane. It is observed that although the inertinite concentrates have a larger pore volume, they are less microporous than their rank equivalent vitrinite concentrates, resulting in lower adsorption heat. Furthermore, it is revealed that the adsorption heat of both vitrinite and inertinite concentrates is primarily correlated to the content of oxygen-containing functional groups and aliphatic hydrocarbons.

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Numerical Simulation of Multiphase Flow in Nanoporous Organic Matter With Application to Coal and Gas Shale Systems

Song

et al. 2018

Water Resources Research

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Fluid flow in nanoscale organic pores is known to be affected by fluid transport mechanisms and properties within confined pore space. The flow of gas and water shows notably different characteristics compared with conventional continuum modeling approach. A pore network flow model is developed and implemented in this work. A 3‐D organic pore network model is constructed from 3‐D image that is reconstructed from 2‐D shale SEM image of organic‐rich sample. The 3‐D pore network model is assumed to be gas‐wet and to contain initially gas‐filled pores only, and the flow model is concerned with drainage process. Gas flow considers a full range of gas transport mechanisms, including viscous flow, Knudsen diffusion, surface diffusion, ad/desorption, and gas PVT and viscosity using a modified van der Waals' EoS and a correlation for natural gas, respectively. The influences of slip length, contact angle, and gas adsorption layer on water flow are considered. Surface tension considers the pore size and temperature effects. Invasion percolation is applied to calculate gas‐water relative permeability. The results indicate that the influences of pore pressure and temperature on water phase relative permeabilities are negligible while gas phase relative permeabilities are relatively larger in higher temperatures and lower pore pressures. Gas phase relative permeability increases while water phase relative permeability decreases with the shrinkage of pore size. This can be attributed to the fact that gas adsorption layer decreases the effective flow area of the water phase and surface diffusion capacity for adsorbed gas is enhanced in small pore size.

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Sorption and desorption of gases (CH4, CO2) on hard coal and active carbon at elevated pressures

Cited by 96 publications

References 6 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

Effects of Maceral Compositions of Coal on Methane Adsorption Heat

Numerical Simulation of Multiphase Flow in Nanoporous Organic Matter With Application to Coal and Gas Shale Systems

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