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  • Modified Permeability Modeling of Coal Incorporating ...

    A good analogy is the San Juan basin, where sorption characteristics of coal are so well understood and defined that operators no longer carry out laboratory sorption work. The goal is to achieve the same for incorporation of the matrix shrinkage behavior. Another modification is to incorporate the matrix, or grain, compressibility effect of ...

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  • Experimental and theoretical investigation on sorption ...

    Jun 06, 2020· Sorption and desorption behaviour of methane, carbon dioxide, and mixtures of the two gases has been studied on a set of wellcharacterised coals from the Argonne Premium Coal …

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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. 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

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

    Jun 15, 2011· Enhanced coal bed methane (ECBM) recovery has been proposed as an attractive way to store captured CO 2 while recovering CH adsorption and desorption behaviors of CO 2 and CH 4 on dry and wet coal (anthracite) were studied at 318 and 338 K and up to 150 atm. The sorption capacity of CO 2 and CH 4 on anthracite coal was higher at lower temperatures and dry coal …

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  • SEISMIC CHARACTERISTICS AND STRAIN OF COAL DURING …

    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

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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. The other coal sizes were ±15 mm (5/8+ mesh) cubical blocks and coal fragments of ...

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  • Sorption characteristic of coal as regards of gas mixtures ...

    Sorption characteristic of coal as regards of gas mixtures emitted in the process of the selfheating of coal WojtachaRychter, Karolina; Smoliński, Adam; Abstract. One of the most challenging tasks in the coal mining sector is the detection of endogenous fire risks. ...

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  • University of Wollongong Research Online

    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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  • Adsorption characteristics of coal in constantpressure ...

    Oct 10, 2009· Full Text; PDF (469 K) PDFPlus (244 K) Citing articles; Adsorption characteristics of coal in constantpressure 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, 3070 Markin/CNRL Natural Resources, Engineering Facility, Edmonton, AB …

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  • Experimental Investigation of the Dependence of Accessible ...

    M. Lutynski and M. Á. González González, “Characteristics of carbon dioxide sorption in coal and gas shale – The effect of particle size,” Journal of Natural Gas Science and Engineering, vol. 28, pp. 558–565, 2016. View at: Publisher Site | Google Scholar

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  • Fractional Characteristics of Coal Fly Ash for Beneficial ...

    Jan 01, 2013· However, the beneficial use of coal fly ash in concrete production and contaminant removal, which have divergent constraints to sorption capacity, requires a more complete understanding of the surface and sorptive characteristics of fly ash.

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  • Comparative study on sorption characteristics of coal ...

    Aug 01, 2019· 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.

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  • Adsorption characteristics of supercritical CO2/CH4 on ...

    Jul 15, 2019· 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 adsorption characteristics of coal determine the amount of the greenhouse gas that deep coal seams can store in place. Using selfdeveloped adsorption facility of supercritical fluids, this paper studied the adsorption …

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

    sorption characteristics of coal seams from Barakar and Raniganj formations of Damodar V alley Basin, India, International Journal of Coal Geology, https:// g//

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  • Influence of temperature on coal sorption characteristics ...

    An experimental study was undertaken to examine the sorption and desorption characteristics of coal at temperatures of 35 °C, 45 °C and 55 °C. 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 ...

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  • Sorption Hysteresis Characterization of CH4 and CO2 on ...

    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 ...

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  • The adsorptionswelling and permeability characteristics ...

    Dec 15, 2017· The main objective of this study is to investigate the adsorption, swelling and permeability sensitivity characteristics of natural coal and reconstituted coal with respect to CO 2 injection process, and finally analyze the roles of weak coal seams in the process of CO 2ECBM or CO 2 geological sequestration. The value of this work is to offset ...

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  • Coal sorption characteristics and coal surface tension

    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 ...

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  • (PDF) The Influence of Sorption Pressure on Gas Diffusion ...

    The Influence of Sorption Pressure on Gas Diffusion in Coal Particles: An Experimental Study ... which reflect the diffusion rate of gas in the coal. The impacts of pore characteristic on gas ...

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  • Thermodynamic Characteristics of Methane Adsorption of ...

    The adsorption of methane in coal depends on both pressure and temperature, and the adsorption gas content decreases as the temperature rises while increases as the pressure increases. When the gas molecule switches between the free state and adsorbed state, energy exchange is accompanied. To study the thermodynamic characteristics (adsorption heat, adsorption content, and adsorption time) …

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  • Study of coal sorption characteristics and gas drainage in ...

    Abstract. The subject of coal sorption characteristics and investigations into the reasons for coal seam gas drainability of the Bulli seam in Sydney Basin were undertaken by focusing on Metropolitan Colliery, where certain parts of the seam have been found to be especially hardto drain.

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  • Sorption characteristic of coal, Particle Size, Gas Type ...

    Sorption characteristic of coal, Particle Size, Gas Type and Time. Underground Coal Operators' Conference (pp. 207215). Wollongong, Australia: University of Wollongong.

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  • Sorption charateristics of methane among various rank ...

    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. Thus, methane sorption isotherms have been measured on a highrank anthracite, a low …

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  • Adsorption/desorption characteristics for methane ...

    646 Adsorption! de sorption characteristics for methane, nitrogen and carbon dioxide of coal samples from Southeast Qinshui Basin, China pressure of CH4 in the cleat system and thereby making CH4 to be desorbed from coal (Puri and Yee, 1990). Both gases offer technical and …

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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. The other coal sizes were ±15 mm (5/8+ mesh) cubical blocks and coal fragments of ...

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  • Role of coal type and rank on methane sorption ...

    Jul 01, 1999· Understanding sorption of gas by coal is extremely important in CBM resource estimation and determining producibility. Methane in coal occurs mostly as adsorbed gas on pore surfaces, but is also present in small quantities as free gas in the fracture network (Levine, 1992). Adsorption and desorption isotherms can be used to evaluate potential ...

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  • Experimental Study on Damage and Gas Migration ...

    Coal and gas outburst is one of the most serious hazards in underground mine operations. In this paper, we explored the damage and gas seepage characteristics of gasbearing coal samples with different pore structures under methane sorptionsudden unloading conditions using a selfdeveloped experimental apparatus. The results show that (1) the deformation of coal samples can be divided into ...

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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 capacity of Indian coal and its variation with ...

    The study of gas sorption characteristics is important for practical assessment of coal bed methane (CBM) production and CO2 sequestration in coal seam. Adsorption isotherm is one of the critical parameters for the establishment of production as well as injection well. Adsorption isotherm provides information about the reservoir conditions and critical desorption pressure as well as volume of ...

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

    Title: Influences of temperature and moisture on coal sorption characteristics of a bituminous coal from the Sydney Basin, Australia Authors: Lei Zhang; Ting Ren; Naj Aziz. Addresses: School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining and Technology, Xuzhou 221116, China ' School of Civil, Mining and Environmental ...

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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 150212 um (150 um) coal samples achieved higher sorption capacity and followed by mm ( mm), mm (8 ...

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  • Adsorption Characteristics of Phenolic Compounds onto Coal ...

    Sep 12, 1998· Carbonaceous adsorbents were prepared by heat treatment of coal reject at 600 °C, after chemical treatment in HNO3, H2SO4, and NaOH at 25 and 75 °C. Pore structure characterization and the phenol adsorption capacities of the adsorbents showed that nitric acid pretreatment significantly enhanced the surface properties, consequently the adsorption capacities of the adsorbents.

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  • Sorption characteristics and mechanisms of ammonium by ...

    ORIGINAL PAPER Sorption characteristics and mechanisms of ammonium by coal byproducts: slag, honeycombcinder and coal gangue L. Y. Zhang • H. Y. Zhang • W. Guo • Y. L. Tian Received: 5 December 2011/Revised: 16 October 2012/Accepted: 23 …

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