Changes of acoustic emission and strain in hard coal during gas sorption–desorption cycles

Majewska, Z.; Ziętek, Jerzy

doi:10.1016/j.coal.2006.06.007

Cited by 65 publications

(36 citation statements)

References 11 publications

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“…The maceral (Ceglarska-Stefańska and Brzóska 1998; Crosdale et al 1998;Laxminarayana and Crosdale 2002;Busch et al 2003;Mastalerz et al 2004;Chang et al 2006;Busch et al 2006;Qin et al 2007;Majewska and Ziętek 2007;Siemons et al 2007;Chang et al 2008;Day et al 2008;Mazumder and Wolf 2008;Pone et al 2009;Majewska et al 2009;Radliński et al 2009;Battistutta et al 2010;Gensterblum et al 2010;Day et al 2011;Kim et al 2011;Jiang et al 2012;Maphala and Wagner 2012;An et al 2013;Cai et al 2013a, b;Lin et al 2013;Dutka et al 2013;Xiao et al 2016) include Vitrinite, Inertinite, Exinite. The common indicators are: moist mineral matter basis, and moist mineral matter-free basis (mmf).…”

Section: Methodsmentioning

confidence: 99%

“…According to the structure and morphology of cell, Inertinite is divided into fusinite, half fusinite, fungus, secretion, coarse grain, particles, debris of inertinite, etc. Figure 10 shows the Chang et al 2006;Qin et al 2007;Chang et al 2008;Jiang et al 2012;Lin et al 2013;Xu and Pan 2015;Xiao et al 2016)-159, English Nelson et al 1980;Giuliani et al 1991;Crosdale et al 1998;Laxminarayana and Crosdale 2002;Busch et al 2003;Mastalerz et al 2004;Hildenbrand et al 2006;Busch et al 2006;Siemons et al 2007;Busch et al 2007;Faiz et al 2007a, b;Majewska and Ziętek 2007;Yu et al 2008a, b, c;Astashov et al 2008;Day et al 2008;Mazumder and Wolf 2008;Pone et al 2009;Majewska et al 2009;Radliński et al 2009;Battistutta et al 2010;Gensterblum et al 2010;He et al 2010;Kim et al 2011;Day et al 2011;Le Gal et al 2012;Maphala and Wagner 2012;Sakurovs 2012;An et al 2013;Cai et al 2013a, b;Dutka et al 2013)-292) relationship between inertinite and Vitrinite reflectance (R o;max ). Figure 10 shows that the relationship betw...…”

Section: Inertinite Content Effect On Adsorption Capacitymentioning

confidence: 99%

“…Figure 9 shows that, the relationship between vitrinite and vitrinite reflectance is expressed as Eq. (31) Chang et al 2006;Qin et al 2007;Chang et al 2008;Hao et al 2012;Zheng 2012;Jiang et al 2012;Gao 2012;Lin et al 2013)-266, English (Mahajan andWalker 1971;Bhattacharyya 1972;Joubert et al 1973;Joubert et al 1974;Banerjee 1988;Yalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Clarkson et al 1997;Crosdale et al 1998;Ö zgen Karacan and Okandan 2000;Laxminarayana and Crosdale 2002;Weishauptová et al 2004;Fitzgerald et al 2005;Dai et al 2006;Saghafi et al 2007;Majewska and Ziętek 2007;Faiz et al 2007a, b;Siemons et al 2007;Yu et al 2008a, b, c;Zhang 2008;Dutta et al 2008;Day et al 2008;Majewska et al 2009;Kędzior 2009;Pini et al 2009;Pone et al 2009;Battistutta et al 2010;Pan et al 2010;Gensterblum et al 2010;He et al 2010;Kim et al 2011;…”

Section: Vitrinite Content Effect On Adsorption Capacitymentioning

confidence: 99%

“…A small amount of carbon is present in carbonate and carbon dioxide, and the content of carbon in coal is higher than that in any other element. Therefore, the Chang et al 2006;Qin et al 2007;Faiz et al 2007a, b;Chang et al 2008;Jiang et al 2012;Lin et al 2013;Xiao et al 2016)-233, English Crosdale et al 1998;Laxminarayana and Crosdale 2002;Busch et al 2003;Mastalerz et al 2004;Busch et al 2006;Hildenbrand et al 2006;Busch et al 2007;Majewska and Ziętek 2007;Siemons et al 2007;Astashov et al 2008;Day et al 2008;Yu et al 2008a, b;Mazumder and Wolf 2008;Pone et al 2009;Radliński et al 2009;Majewska et al 2009;Gensterblum et al 2010;Battistutta et al 2010;He et al 2010;Day et al 2011;Kim et al 2011;Maphala and Wagner 2012;Sakurovs 2012;An et al 2013;Cai et al 2013a, b;Dutka et al 2013)-169) Effects of coal rank on physicochemical properties of coal and on methane adsorption 139 metamorphism degree of coal is often referred to as carbonization degree. In order to reduce the impact of ash, moisture and other content, we use ash-free basis Dry indicator, Fig.…”

Section: Carbon Content Effect On Adsorption Capacitymentioning

confidence: 99%

See 3 more Smart Citations

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: Inertinite Content Effect On Adsorption Capacitymentioning

confidence: 99%

Section: Vitrinite Content Effect On Adsorption Capacitymentioning

confidence: 99%

Section: Carbon Content Effect On Adsorption Capacitymentioning

confidence: 99%

See 2 more Smart Citations

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 a laboratory, a coal sample is often subjected to cyclical processes of sorption/desorption. Many researchers signalled that systematic saturation of coal with methane and outgassing it to a vacuum lead to changes in the basic sorption parameters [8,9]. According to the suggestions of the authors, these changes are caused by the effect of the sorption-induced swelling of coal, which results in some structural changes in the coal substance, leading to the enlargement of the sorption area.…”

Section: Introductionmentioning

confidence: 99%

The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series

2017

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Abstract:The aim of this paper was to investigate the repeatability of sorption processes occurring in the coal-methane system during multiple measurement series. For research purposes, three granular samples of coal sorbent were used. The samples were subjected to a series of three measurements, each time performed under the same conditions. During each series of measurements, the following stages took place: outgassing the sample in a vacuum, and then saturating it with methane under the pressure of 1, 3, and 10 bar. Sorption capacities and the values of effective diffusion coefficients were compared. The studies into the repeatability of measurements of sorption capacities, conducted by means of the IGA-001 (Intelligent Gravimetric Analyzer) gravimetric instrument for three measurement cycles, showed that the obtained measurement discrepancies in relation to the mean value did not exceed 1.23%. The discrepancies in question approximated the measurement uncertainty of the IGA-001 device. The evaluation of the recurrence of determining the values of effective diffusion coefficients showed that the obtained discrepancies were no larger than 10%, which might have resulted from problems with fulfilling most of the assumptions of the applied unipore diffusion model. The authors did not observe any changes of the sorption parameters of hard coal during consecutive cycles of methane saturation.

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Carbon dioxide sequestration effects on coal's hydro-mechanical properties: a review

Perera

Ranjith

2012

Int. J. Energy Res.

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SUMMARY Carbon dioxide (CO2) sequestration in deep un‐minable coal seam causes the seam's permeability and strength to be significantly reduced because of CO2 adsorption‐induced matrix swelling. This paper reviews this swelling process in coal and its influence on coal's flow and strength properties. The amount of swelling depends on the properties of both the gas and the coal mass. The swelling caused by CO2 adsorption is higher compared with that caused by CH4 and N2 and greatly depends on the state of the CO2 phase. The super‐critical state of CO2 adsorption causes greater swelling compared with the sub‐critical state. It has been observed that the swelling rate increases with increasing CO2 pressure; however, high saturation pressures may cause the coal matrix to shrink. The swelling rate reduces with increasing temperature, and the effect of coal rank on swelling still remains unclear. The CO2 adsorption‐induced swelling effect causes the coal mass permeability to be significantly reduced, and the reduction is significant for super‐critical CO2.The effect of swelling on coal permeability reduces with increasing temperature. The coal matrix swelling and associated polymer structure re‐arrangement occur in the coal mass during and after the CO2 injection, resulting in the weakening of the coal mass strength. The strength reduction is much higher for high rank coal compared with low rank coal. It is also observed that the influence of super‐critical CO2 on strength is more powerful than that of sub‐critical CO2. Although CO2 sequestration in deep coal seams has been carried out in several main coal seams in the USA, Australia and some other countries, none of these projects has achieved the original target of storing large amounts of CO2, possibly because initial analysis did take into account the effects of coal seam property changes because of the adsorption of CO2 during and after injection. Copyright © 2012 John Wiley & Sons, Ltd.

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Changes of acoustic emission and strain in hard coal during gas sorption–desorption cycles

Cited by 65 publications

References 11 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

The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series

Carbon dioxide sequestration effects on coal's hydro-mechanical properties: a review

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