Kinetics of CO2 and CH4 sorption on high rank coal at ambient temperatures

Marecka, A.; Mianowski, A.

doi:10.1016/s0016-2361(98)00071-4

Cited by 55 publications

(35 citation statements)

References 5 publications

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“…The PSOE shows good agreement with the experimental data obtained by Marecka and Mianowski (1993). However, application of the proposed equation to the experimental data of sorption of CH 4 and CO 2 is unsuitable (Fig.…”

Section: Analysis Resultssupporting

confidence: 67%

“…A similar equation was developed by Gawor and Skoczylas (2014), although the equation is based on the heat conductivity equation and involves measurements of the heat balance of a coal-coated thermometer during the gas sorption process. Marecka and Mianowski (1993) proposed an empirical kinetic pseudo-second-order rate equation (PSOE) under isothermal-isobaric conditions based on chemometric analysis of kinetic equations describing the diffusion process in the hard coal-gas system. The mathematical form of the PSOE was first proposed by Blanchard et al (1984) to describe the kinetics of heavy metal removal by natural zeolites.…”

Section: Resultsmentioning

confidence: 99%

“…It is the most commonly used equation to describe sorption kinetic data (Płaziński et al 2013;Marczewski et al 2013). The general form of the differential equation describing the rate of fractional uptake given by Marecka and Mianowski (1993) is:…”

Section: Resultsmentioning

confidence: 99%

“…For two equations based on the bidisperse gas transport model, the equation proposed by Busch et al (2004) is better to interpret and quantify observed gas uptake rates in coal than the equation proposed by Siemons et al (2007). The PSOE of Marecka and Mianowski (1993) is unsuitable for the data. The Elovich equation fits the results obtained in this study well, because the sorption and sorption-induced expansion processes were still in progress and the problem of a lack of a maximum sorbed amount value in the equation did not occur.…”

Section: Discussionmentioning

confidence: 99%

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Kinetic models assessment for swelling of coal induced by methane and carbon dioxide sorption

et al. 2016

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The ability of five kinetic equations to describe the sorption kinetics and expansion rate of solid coal samples was investigated. The conducted experiment included the measurements of sorption of methane and carbon dioxide on cuboidal hard coal samples at high pressure using volumetric method. Simultaneously the kinetics of coal sorption induced swelling was monitored. All of the approaches used to fit the experimental sorption and dilatometric data were literature-based equations. Two equations represent the traditional approach for sorption on powder and grain fractions based on the bidisperse gas transport model, and have been used to interpret and quantify the observed gas uptake rates in coal. The other three kinetic equations are the pseudo-second-order kinetic equation, Elovich equation, and stretched exponential (SE) equation. Four of the five equations are suitable to describe the kinetics of methane and carbon dioxide sorption in the porous structure of solid coal samples and the kinetics of coal expansion that accompany the sorption processes. The SE equation gave the best fit to the experimental data.

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Section: Analysis Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Kinetic models assessment for swelling of coal induced by methane and carbon dioxide sorption

et al. 2016

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“…Experiments were performed using the apparatus and test procedures described by Majewska et al [17]. Our findings translate into general conclusions:  for two equations based on the bidisperse gas transport model, the equation proposed by Busch et al [18] gives better fit than the equation proposed by Siemons et al [26],  the pseudo-second-order equation (PSOE) of Marecka and Mianowski [30] was unsuitable for the data  the Elovich equation fits the results well, because the sorption and sorption-induced expansion were far from equilibrium, however, because the function goes to infinity it should be avoided  the stretched exponential equation gives the best fit and is in very good agreement with the experimental results [29].…”

Section: Introductionsupporting

confidence: 59%

Kinetics of methane and carbon dioxide sorption and sorption–induced expansion of coal – kinetic equations assessment

et al. 2016

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Abstract. The aim of this study was to investigate the ability of kinetic equations to describe the sorption kinetics and expansion rate of solid coal samples. In order to address his issue the sorption kinetics of methane and carbon dioxide on bituminous coals were studied. At the same time, the changes occurring in the sample's overall dimensions, which accompanied sorption processes, were monitored. Experiments were carried out at high pressure by means of the volumetric method on a cubicoid solid samples. Several literature-based modeling approaches and equations are proposed to fit the kinetic curves of gas deposition, as well as the adequate kinetics of coal swelling. First equation represents the traditional approach to interpret experimental data in terms of fast and slow sorption process and consider the combination of two first-order rate functions. The other empirical kinetic equations are: the pseudo-second-order kinetic equation (PSOE), Elovich equation and the stretched exponential equation (SE). Two of the four equations are suitable to describe the kinetics of methane and carbon dioxide sorption and have been successfully used to quantify the observed dilatometric phenomena rates. The stretched exponential equation gave the best fit to the experimental data.

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