Journal ArticleDOI
Adsorption and gas transport in coal microstructure: investigation and evaluation by quantitative X-ray CT imaging
C.O. Karacan,Ender Okandan +1 more
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In this article, gas transport and adsorption were investigated on a 3.8 cm diameter core of a medium volatile bituminous coal from Gelik seam in the Zonguldak Basin (Northwestern Turkey) by using quantitative X-ray computerized tomography (CT) imaging technique to visualize the interior of the coal during the experiment.About:
This article is published in Fuel.The article was published on 2001-03-01. It has received 202 citations till now. The article focuses on the topics: Coal & Bituminous coal.read more
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Coal mine methane: A review of capture and utilization practices with benefits to mining safety and to greenhouse gas reduction
TL;DR: In this article, the technical aspects of coal mine methane capture in and from coal mines, the main factors affecting CMM accumulations in underground coal mines and methods for capturing methane using boreholes, specific borehole designs for effective methane capture, aspects of removing methane from abandoned mines and from sealed/active gobs of operating mines, benefits of capturing and controlling CMM for mine safety, and benefits for energy production and greenhouse gas (GHG) reduction.
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Fractal characterization of adsorption-pores of coals from North China: An investigation on CH4 adsorption capacity of coals
TL;DR: In this paper, the fractal analysis for 13 fresh coal samples (R o from 0.79 to 4.24%) in North China was conducted to better understand the characteristics of adsorption-pores (pore diameter <100 nanometers).
Journal ArticleDOI
Applications of X-ray computed tomography in the geosciences
TL;DR: X-ray computed tomography (CT) is a technique that allows non-destructive imaging and quantification of internal features of objects as mentioned in this paper, which can be used for the study of porosity, the relative distribution of contrasting solid phases and the penetration of injected solutions.
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Permeability evolution in fractured coal: The roles of fracture geometry and water-content
TL;DR: In this paper, the authors investigate the evolution of coal permeability with respect to applied stress and pore pressure at room temperature, and find that the initial permeabilities to all gases are nearly two orders of magnitude lower than for dry coal and permeabilities increase with increasing pore pressures.
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Heterogeneous Sorption and Swelling in a Confined and Stressed Coal during CO2 Injection
TL;DR: In this paper, a confined Pittsburgh seam (DECS-12) coal sample was pressurized with carbon dioxide (CO2) and the changes in the sorbed gas concentration and matrix properties were studied using dual-energy X-ray computed tomography (X-ray CT).
References
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Journal ArticleDOI
The effect of pore structure and gas pressure upon the transport properties of coal: a laboratory and modeling study. 1. Isotherms and pore volume distributions
TL;DR: In this paper, the effect of coal composition upon pore structure and adsorption characteristics of four bituminous coals of the Cretaceous Gates Formation coal is investigated.
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Sorption by solids with bidisperse pore structures
TL;DR: In this article, a bidisperse model for transient diffusion in porous systems consisting of small spherical particles is presented, which describes sorption in pelletized particles and in some types of molecular sieves and ion exchange resins.
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The effect of pore structure and gas pressure upon the transport properties of coal: a laboratory and modeling study. 2. Adsorption rate modeling
TL;DR: In this article, the effect of coal composition, pore structure, and gas pressure upon methane and carbon dioxide gas transport in Cretaceous Gates Formation coal is investigated, and a new numerical model for matrix gas diffusion/adsorption is developed and applied to methane and CO 2 volumetric adsorption rate data.
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Shrinkage of coal matrix with release of gas and its impact on permeability of coal
TL;DR: In this article, the authors investigated the relationship between the coal matrix shrinkage and the gas flow path in coalbeds and found that the coal volume shrinks by ≈ 0.4% when the gas pressure falls from 6.9 MPa to atmospheric pressure.
Book
Equilibria and dynamics of gas adsorption on heterogeneous solid surfaces
TL;DR: In this article, the authors proposed a new approach to analyze the adorption-desorption kinetics on flat homogeneous surfaces based on statistical rate theory of interfacial transport.