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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 ...
Abstract. Methane production from coal seams has been actively pursued in the since the mid1970''s. This resource is regarded as an unconventional natural gas supply due to several unique characteristics of the reservoir, including: twophase (water and gas) flow, low effective permeability to gas, and the majority Of the methane being held in an adsorbed state on the internal surfaces of ...
Role of coal type and rank on methane sorption characteristics of Bowen Basin, Australia coals. ... The Langmuir volume (V L) physically represents the monolayer adsorption capacity of the coal and is an important characteristic of the samples. The Langmuir pressure (P L) ...
The study of gas sorption characteristics is important for practical assessment of coal bed methane (CBM) production and CO2 sequestration in coal seam.
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.
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 ...
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.
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.
Sorption characteristics and mechanisms of ammonium by coal ... honeycombcinder and coal gangue. The ammonium sorption processes were well modeled by the pseudo secondorder model (R2 [). The experimental data were fitted to both the Langmuir model and the Fre
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 ...
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 paleogeologic 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 .
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.
Sorption processes can be used to study different characteristics of coal properties, such as gas content (coalbed methane potential of a deposit), gas diffusion, porosity, internal surface area ...
Abstract. The study of gas sorption characteristics is important for practical assessment of coal bed methane (CBM) production and CO 2 sequestration in coal seam. Adsorption isotherm is one of the critical parameters for the establishment of production as well as injection well.
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.
Some characteristics of coal were also investigated, these were namely, the spectra of surface functional groups and the weight loss on evacuation in the temperature range 30–140°C. Adsorption of water is related to the surface functional groups rather than to the extent of the surface.
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.
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 ...
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,, Committee Chair Department of Geosciences
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 ...
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 ...
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.
Jan 01, 2014· Read "Coal sorption characteristics and coal surface tension, International Journal of Oil, Gas and Coal Technology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
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