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SEISMIC CHARACTERISTICS AND STRAIN OF COAL DURING THE SORPTION

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SEISMIC CHARACTERISTICS AND STRAIN OF COAL DURING THE SORPTION OF CO 2 AND CH 4 A THESIS IN Environmental and Urban Geosciences Presented to the Faculty of the University of Missouri-Kansas City in partial fulfillment of the requirements for the degree MASTER OF SCIENCE by PADMAVATHI IYENGAR B.E., Visvesvaraya Technological University-India, 2005 M.S., University of .

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Coal sorption characteristics and coal surface tension

These findings provide the basic knowledge for a better understanding of coal sorption characteristics associated with coal seam gas drainage, which will benefit ventilation and degasification design and hence help to prevent coal mine operations from gas outburst disaster.

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Effect of pore characteristics on coalbed methane ...

Pore characteristics in coal samples is affected by coalification to a large extent. The adsorption volume of gas mainly concentrates in micropores, and the adsorption capacities of different coal samples display remarkable difference.

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Laboratory | Sigra

Coal sorption behaviours may sometimes be best expressed by using one or the other model. Reports are provided on an as received and mineral matter free basis. The logarithmic equation may show very clearly a change in sorption characteristic at a certain pressure whereas this cannot be deduced using the Langmuir approach.

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Sorption Characteristic of Coal, Particle Size, Gas Type ...

Sorption characteristics of Bulli seam coal samples were examined with respect to coal particle size, gas type and time. Sorption tests were carried out by the indirect gravimetric method for determining gas content in coal. Various coal particle sizes were tested in addition to 54 mm diameter coal core.

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"Sorption Characteristic of Coal, Particle Size, Gas Type ...

Sorption characteristics of Bulli seam coal samples were examined with respect to coal particle size, gas type and time. Sorption tests were carried out by the indirect gravimetric method for determining gas content in coal. Various coal particle sizes were tested in addition to 54 mm diameter coal core.

Author: Raul Maria Melgarejo Florentin, Najdat I Aziz, Dennis Black, Long NghiemGet Price

Laboratory Isotherms - Mixed Gas, Native Sorption, Coal ...

Coal sorption behaviours may sometimes be best expressed by using one or the other model. Reports are provided on an as received and mineral matter free basis. The logarithmic equation may show very clearly a change in sorption characteristic at a certain pressure whereas this cannot be deduced using the Langmuir approach.

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Experimental Study on Damage and Gas Migration ...

The amount of gas sorption on coal is closely related to coal surface area, which is related to the pore characteristics of coal. Coal characteristics are important factors affecting the content of free gas of coal and determining coal's gas sorption, diffusion, and seepage, which are basic indicators of the permeability of coal seams.

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Sorption Characteristic of Coal, Particle Size, Gas Type ...

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ABSTRACT: Sorption characteristics of Bulli seam coal samples were examined with respect to coal particle size, gas type and time. Sorption tests were carried out by the indirect gravimetric method for determining gas content in coal.

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Coal sorption characteristics and coal surface tension ...

01/01/2014 · Coal sorption characteristics and coal surface tension Zhang, Lei ; Ren, Ting ; Aziz, Naj ; Tu, Shihao 2014-01-01 00:00:00 Underground coal mining in the Bulli Seam of Sydney Basin, Australia encounters the problems of coal and gas outburst as the coal contains high concentration of CO2, where certain parts of the seam have been found to be especially hard-to-drain. In order to better ...

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(PDF) Comparative study on sorption characteristics of ...

Chemical and petrographic compositions of coal are the measures of maturity and type of organic matter that control the methane sorption characteristics of the coal. 99% of Indian coal occurrences...

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Influence of Coal Particle Size on Coal Adsorption and ...

Hence, coal particle size had a significant influence on the coal sorption characteristics including sorption capacity and desorption hysteresis for CO 2 and CH 4, especially calculated with dry basis of coal. In this study, the 150-212 um (150 um) coal samples achieved higher sorption capacity and followed by 2.36-3.35 mm (2.4 mm), 8-9.5 mm (8 mm) and 16-19 mm (16 mm) particle size samples ...

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Adsorption characteristics of CO2 and CH4 on dry and wet ...

Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions Chemical Engineering Journal 171 (2011) 45–53 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage:

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Coal sorption characteristics and coal surface tension

These findings provide the basic knowledge for a better understanding of coal sorption characteristics associated with coal seam gas drainage, which will benefit ventilation and degasification design and hence help to prevent coal mine operations from gas outburst disaster.

Get Price

Adsorption characteristics of coal in constant-pressure ...

Adsorption characteristics of coal in constant-pressure tests. Ali Sabir, a R. J. Chalaturnyk b. a GeoEngineering Centre at Queen's–RMC, Queen's University, Kingston, ON K7L 3N6, Canada. b Geotechnical Engineering, University of Alberta, 3-070 Markin/CNRL Natural Resources, Engineering Facility, Edmonton, AB T6G 2W2, Canada. Corresponding author (email: [email protected]) .

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Model development and analysis of coal permeability based ...

Generally, when the seepage characteristics of coal is studied, the units that constitute the dual-porosity coal structure (i.e. coal matrices and fractures) are assumed to be the geometries with rule shapes to quantitatively analyze the impact of effective stresses and the sorption deformation of coal matrices on coal permeability (Palmer & Mansoori 1998; Shi & Durucan 2004).

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Article: Influences of temperature and moisture on coal ...

The adsorption capacity of coal shows a linear decrease with increasing temperature. The decreasing rate of adsorption capacity is greater for CO 2 than CH 4, and which is also higher for dry coals. The moist coal sample isotherms for both CO 2 and CH 4 demonstrate a much lower sorption capacity.

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Adsorption characteristics of CO2 and CH4 on dry and wet ...

Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions Chemical Engineering Journal 171 (2011) 45–53 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage:

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Hysteresis of methane/coal sorption isotherms (Conference ...

OSTI.GOV Conference: Hysteresis of methane/coal sorption isotherms. Hysteresis of methane/coal sorption isotherms. Full Record; Other Related Research

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Sorption Hysteresis Characterization of CH4 and CO2 on ...

The N 2 sorption isotherms show that a wide distribution of pore size existed in three coal samples, and with the process of coalification, the specific surface area (SSA) decreased and then increased, while the pore size of coal monotonically decreased. This is confirmed by SEM observation.

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Influence of coal particle size on coal adsorption and ...

The sorption isotherm was found to be highly sensitive with helium density of coal which was determined in the procedure of testing the void volume of sample cell.

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