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PDF | Hydrogen sorption characteristics of activated carbons (ACs) produced by physical and chemical activations from two coal mines (Kilimli and Armutcuk) in the Zonguldak region, Turkey were ...
According to the literature, the grain size of coal used in adsorption testing affects the measured gas storage capacity and the use of finely ground coal samples in sorption testing leads to a ...
Oct 10, 2009· Adsorption characteristics of coal have traditionally been studied using crushed coal specimens. When adsorption tests are run on a crushed coal specimen, adsorption kinematics are not involved and therefore the equilibrium of gases is attained rapidly.
The injection of CO 2 into deep coal beds can not only improve the recovery of CH 4, but also contribute to the geological sequestration of CO 2.The adsorption characteristics of coal determine the amount of the greenhouse gas that deep coal seams can store in place. Using self-developed adsorption facility of supercritical fluids, this paper studied the adsorption behavior of supercritical CO ...
examined a thesis titled "Seismic characteristics and strain of coal during the sorption of CO 2 and CH 4," presented by Padmavathi Iyengar, candidate for the Master of Science Degree, and certify that in their opinion it is worthy of acceptance. Supervisory committtee Jejung Lee, Ph.D., Committee Chair Department of Geosciences
The coal selected for experiments was a bituminous steam coal with 3.8%wt ash content. The shale sample was characterized by rather low TOC (1.1%) but high clay minerals content. The purpose of the study was to compare the high pressure CO 2 sorption characteristics of coal and gas shale and relate it to the particle size of samples subjected ...
Request PDF on ResearchGate | Coal sorption characteristics and coal surface tension | Underground coal mining in the Bulli Seam of Sydney Basin, Australia encounters the problems of coal .
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). Thus, this ...
Introduction 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 °C, have been identified as an attractive option which can shed light on the behaviour of gas * Corresponding author.
onto the coal surface. It is generally analyzed using the sorption characteristics between coal and gas and a sorption isotherm with pressure [14]. The indirect method usually takes less time, and results are more easily obtained. However, it has the following disadvantages: (1) the physical properties of coal such as ash, moisture, cleat, and ...
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 ...
The theory of coal surface free energy was found to be capable of explaining coal sorption characteristics. 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 ...
The study of gas sorption characteristics is important for practical assessment of coal bed methane (CBM) production and CO2 sequestration in coal seam.
Sorption hysteresis characterization of CH 4 and CO 2 on lignite, bituminous coal, and anthracite were studied to improve the understanding of the interaction between gas molecules and different ranks of coal and further improve the precision of the adsorption methods in characterizing pore structure at low pressure. Pore structure of three ranks of coal was investigated with scanning electron ...
Nie et al. (2016) performed experiments of sorption characteristics of methane in various rank coal samples at different moisture contents and concluded that the effect of moisture content on a ...
Sorption characteristic of coal, Particle Size, Gas Type and Time. Underground Coal Operators' Conference (pp. 207-215). Wollongong, Australia: University of Wollongong.
of sample cell. Hence, coal particle size had a significant influence on the coal sorption characteristics including sorption capacity and desorption hysteresis for CO2 and CH4, especially calculated with dry basis of coal. In this study, the 150-212 um (150 um) coal samples achieved higher sorption .
Gas Sorption Characteristics of Tectonically Deformed Coals and Their Implications on Gas Drainage and Outburst Control ... Levine, 1996, Harpalani and Chen, 1997). The gas sorption behavior of coal is controlled by the pore structure of coal, which is significantly influenced by the paleo-geologic evolutions of the coal formation. ...
2011 Underground Coal Operators' Conference The AusIMM Illawarra Branch 10 – 11 February 2011 269 INFLUENCE OF TEMPERATURE ON THE GAS CONTENT OF COAL AND SORPTION MODELLING Lei Zhang,1Naj Aziz, Ting Ren and Zhongwei Wang ABSTRACT: An experimental study was undertaken to examine the sorption and desorption characteristics of coal at temperatures of .
2009 Coal Operators' Conference The AusIMM Illawarra Branch 208 12 – 13 February 2009 SORPTION CHARACTERISTIC OF COAL, PARTICLE SIZE, GAS TYPE AND TIME Raul Florentin1, Naj Aziz1, Dennis Black1 and Long Nghiem1 ABSTRACT: Sorption characteristics of Bulli seam coal samples were examined with respect to coal particle size, gas type and time.
Sorption characteristics and mechanisms of ammonium by coal ... honeycomb-cinder and coal gangue. The ammonium sorption processes were well modeled by the pseudo second-order model (R2 [0.99). The experimental data were fitted to both the Langmuir model and the Fre-
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 are contributed by lower Gondwana sequences housed in two major geologic formations, younger Raniganj and older Barakar.
Abstract. Enhanced coalbed methane (ECBM) in deep coal seams is being actively investigated around the world. Since the in situ coal seams are always saturated with water, methane sorption behavior on coal in the presence of water can help accurately assess the amount of recoverable methane.
Abstract: Adsorption deformation significantly affects the seepage characteristics of coal. However, effect of sorption time on coal permeability and gas pressure has not been investigated systematically. In this study, the sorption experiment of coal samples is conducted to elaborate the importance of sorption equilibration time.
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