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Adsorption characteristics of coal in constant-pressure ...

Adsorption characteristics of coal in constant-pressure 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, 3-070 Markin/CNRL Natural Resources, Engineering Facility, Edmonton, AB T6G 2W2, Canada. Corresponding author (email: [email protected]) .

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Adsorption Characteristics of Phenolic Compounds onto Coal ...

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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Isothermal characteristics of methane adsorption and ...

18/05/2020 · Coal is compounded of organic matters and minerals, and is a typical porous medium. It has intense heterogeneity in the pore structure. In the field of coalbed methane development, pores with pore apertures <10 nm are the most dominant in methane adsorption (Cai et al., 2013; Jin et al., 2016; Zhao et al., 2016a).When the pore aperture exceeds 100 nm, it will favor the seepage of methane (Cai ...

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Dynamic Micromapping of CO2 Sorption in Coal | Langmuir

Our results indicate that details of CO2 sorption into coal pores differ greatly between different coals and depend on the amount of mineral matter dispersed in the coal matrix: a purely organic matrix absorbs more CO2 per unit volume than one containing mineral matter, but mineral matter markedly accelerates the sorption kinetics. Small pores are filled preferentially by the invading CO2 ...

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Fractional Characteristics of Coal Fly Ash for Beneficial ...

01/01/2013 · 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. A systematic analysis of fly ash particle size fractions established linkages between particle size, particle morphology, unburned carbon content, .

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Isothermal characteristics of methane adsorption and ...

18/05/2020 · Coal is compounded of organic matters and minerals, and is a typical porous medium. It has intense heterogeneity in the pore structure. In the field of coalbed methane development, pores with pore apertures <10 nm are the most dominant in methane adsorption (Cai et al., 2013; Jin et al., 2016; Zhao et al., 2016a).When the pore aperture exceeds 100 nm, it will favor the seepage of methane (Cai ...

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

Adsorption characteristics of CO2 and CH4 on dry and wet coal from subcritical to supercritical conditions Chemical Engineering Journal 171 (2011) 45–53 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage:

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Laboratory | Sigra

Coal sorption behaviours may sometimes be best expressed by using one or the other model. Reports are provided on an as received and mineral matter free basis. The logarithmic equation may show very clearly a change in sorption characteristic at a certain pressure whereas this cannot be deduced using the Langmuir approach.

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Sorption Hysteresis Characterization of CH4 and CO2 on ...

The N 2 sorption isotherms show that a wide distribution of pore size existed in three coal samples, and with the process of coalification, the specific surface area (SSA) decreased and then increased, while the pore size of coal monotonically decreased. This is confirmed by SEM observation.

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Sorption characteristics and mechanisms of ammonium by ...

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Sorption characteristics and mechanisms of ammonium by coal by-products: slag, honeycomb-cinder and coal gangue L. Y. Zhang • H. Y. Zhang • W. Guo • Y. L. Tian Received: 5 December 2011/Revised: 16 October 2012/Accepted: 23 December 2012/Published online: 13 February 2013 Islamic Azad University (IAU) 2013 Abstract The adsorption behaviors of ammonium from aqueous solutions were ...

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Classification of Water Sorbed in Coal on the Basis of ...

A differential scanning calorimetric (DSC) study on the characteristics and behavior of water in low-rank coals. Fuel 2014, 135, 243-252. DOI: 10.1016/j.fuel.2014.06.068. Tomáš Zelenka, Boleslav Taraba. Sorption of CO 2 on low-rank coal: Study of influence of various drying methods on microporous characteristics.

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Experimental Study on Damage and Gas Migration ...

The amount of gas sorption on coal is closely related to coal surface area, which is related to the pore characteristics of coal. Coal characteristics are important factors affecting the content of free gas of coal and determining coal's gas sorption, diffusion, and seepage, which are basic indicators of the permeability of coal seams.

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The adsorption-swelling and permeability characteristics ...

15/12/2017 · Coal seams experiencing multiple geological structures are regarded as weak coal seams for their lower strength than normal coal seams. Besides the mechanical characteristics, tectonic movements can also transform the internal structure and promote the development of primary structure coal into tectonically deformed coal.

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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 150-212 um (150 um) coal samples achieved higher sorption capacity and followed by 2.36-3.35 mm (2.4 mm), 8-9.5 mm (8 mm) and 16-19 mm (16 mm) particle size samples ...

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In situ characterization of the transport and sorption ...

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The most important transport and sorption characteristics of coal seams are butt and face cleat permeabilities, macropore porosity, Langmuir volume constant, Langmuir pressure constant, and sorption time constant. Conventional methods, such as type curve matching techniques and laboratory-derived measurements are handicapped in terms of being representative over the entire domain of .

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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.

Author: Raul Maria Melgarejo Florentin, Najdat I Aziz, Dennis Black, Long NghiemGet Price

Article: Coal sorption characteristics and coal surface ...

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 operations from gas outburst disaster. [Received ...

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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.

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Comparative study on sorption characteristics of coal ...

01/08/2019 · 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.

Author: Sujoy Chattaraj, Sujoy Chattaraj, Debadutta Mohanty, Tarkeshwar Kumar, Gopinath Halder, Kanhaiya Mis...Get Price

Experimental and Simulation Studies on Adsorption and ...

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It is generally analyzed using the sorption characteristics between coal and gas and a sorption isotherm with pressure. The indirect method usually takes less .

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Hysteresis of methane/coal sorption isotherms (Conference ...

OSTI.GOV Conference: Hysteresis of methane/coal sorption isotherms. Hysteresis of methane/coal sorption isotherms. Full Record; Other Related Research

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