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Influence of temperature on coal sorption characteristics and the theory of coal surface free energy . Lei Zhang. a, *, Naj Aziz. a, Ting X Ren. a, Zhongwei Wang. a. a University of Wollongong, Wollongong, NSW2500, Australia. Abstract . An experimental study was undertaken to examine the sorption and desorption characteristics of coal at
#0183;#32;And they focus on the difference of sorption characteristics of raw coal and residual coal, neglecting a fact that the sorption methane in coal is in various formation, which is determined mostly by pore structure of coal, while the methane of solid solution state is mainly stored in sealed pores of coal (Alexeev et al., 2004b).
Request PDF | Coal sorption characteristics and coal surface tension | Underground coal mining in the Bulli Seam of Sydney Basin, Australia encounters the problems of coal and gas outburst as the
2010). However, a complete characterization of the ammonium removal by these coal byproducts has not yet been reported. The aim of this study was to determine the sorption capacity of slag, honeycombcinder and coal gangue for the ammonium removal from wastewater. The sorption isotherm kinetics were studied to analyze the ammonium
Geological sequestration of CO2 into depleted oil reservoir, saline aquifer or unmineable coal seam is now being actively investigated for the purpose of reducing greenhouse gas in the atmosphere. Understanding the physical, chemical, and thermodynamic phenomena occurred with CO2 injection is very important in marking a reliable prediction of sequestration. This study examined the feasibility
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. The other coal sizes were #177;15 mm (5/8+ mesh) cubical blocks and coal fragments of
The study focused on the effect of changes in temperature and coal particle sizes on gas sorption and desorption characteristics. The coal size used ranged from fragmented coals, 16 mm, 8 mm, mm, powdered coal of 150 m and 54 mm core samples.
Sorption characteristic of coal, Particle Size, Gas Type and Time. Underground Coal Operators'' Conference (pp. 207215). Wollongong, Australia: University of Wollongong.
Gas sorption in coal has been studied over the years by many researchers [1, 2, 3], and in recent. years, the coal sorption characteristics at high temperatures, beyond the normal temperature of 20 ~. 29 #176;C, have been identified as an attractive option which can shed light on the behaviour of gas.
Desorption rate studies on crushed samples show that dull coals desorb more rapidly than bright coals and that desorption rate is also a function of rank. Coals of lower rank have higher effective diffusivities. Mineral matter was found to have no influence on desorption rate of these finely crushed samples.
3D characterization of coal strains induced by compression, carbon dioxide sorption, and desorption at insitu stress conditions. International Journal of Coal Geology 2010, 82 (34), 262268.
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.
Article Coal sorption characteristics and coal surface tension. 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 CO 2, where certain part...
#0183;#32;The methane sorption shows a strong rank dependence as evident from a strong positive relationship between carbon content/vitrinite reflectance and Langmuir volume for the studied coals. The sorption capacity of Barakar coals is relatively higher than the Raniganj coals because of the differential rank enhancement due to different burial and thermal history.
Coal is a natural sorbent with a diverse character of pore structures which are surrounded by fractures and cleavage planes constituting ideal spaces for the flow and adsorption of gases.
Knowledge of the gas sorption characteristics of a coal not only helps to explain the mechanism of enhanced coalbed methane recovery but also provides an important basis for simultaneous coal and
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