A fractal interpretation of the effect of drying on the pore structure of Victorian brown coal

Reich, Michael; Snook, Ian K.; Wagenfeld, H.

doi:10.1016/0016-2361(92)90170-s

Cited by 59 publications

(27 citation statements)

References 6 publications

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“…It appears sponge-like in appearance and resembles a porous solid with a low surface fractal dimension. This observation is consistent with all other indirect work reported on the proposed structure of raw brown coal (2). Further it supports our interpretation of a smooth open fractal pore structure.…”

Section: Resultssupporting

confidence: 95%

“…Thus, the surface fractal dimensions obtained by fitting to these linear regions in this q range have reasonably large uncertainties and further more extrapolation to q = 0 to obtain N 0 from Eqs. [1] and [2] results in very large uncertainties. Thus, only qualitative remarks can be made about the behavior of N 0 from these USANS measurements.…”

Section: Resultsmentioning

confidence: 97%

“…The use of smallangle scattering (1)(2)(3)(4)(5) and transmission electron microscopy (6)(7)(8) for the study of coal has proved invaluable in elucidating the nature and structure of the porosity. The length scales over which these techniques may be used to study coal are typically from the meso to micro porous regimes.…”

Section: Measuring Coal Porositymentioning

confidence: 99%

“…Coal is a structurally heterogeneous solid containing capillaries, cracks, and open and closed pores (1)(2)(3). The use of smallangle scattering (1)(2)(3)(4)(5) and transmission electron microscopy (6)(7)(8) for the study of coal has proved invaluable in elucidating the nature and structure of the porosity.…”

Section: Measuring Coal Porositymentioning

confidence: 99%

See 3 more Smart Citations

The Pore Structure in Processed Victorian Brown Coal

McMahon¹,

Snook²,

Treimer³

2002

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 95%

Section: Resultsmentioning

confidence: 97%

Section: Measuring Coal Porositymentioning

confidence: 99%

Section: Measuring Coal Porositymentioning

confidence: 99%

See 2 more Smart Citations

The Pore Structure in Processed Victorian Brown Coal

McMahon¹,

Snook²,

Treimer³

2002

Journal of Colloid and Interface Science

Self Cite

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“…Maria and Cai et al (2013a, b) analyzed eight coals with similar coal rank but varying petrographic for CH 4 sorption capacity using a high-pressure adsorption isotherm technique and determined the coal quality and petrographic composition of the coals to study their relationships to the volume of CH 4 that could be sorbed into the coal. Previous studies have concluded the qualitative and partly quantitative relationship between physicochemical properties of coal and their adsorption capacity without giving variation scope of adsorption parameters (Unsworth et al 1989;Yalçin and Durucan 1991;Reich et al 1992;Clarkson and Bustin 1999;Mastalerz et al 2009;Charrière et al 2010;Yao and Liu 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of coal rank on physicochemical properties of coal and on methane adsorption

Cheng

Jiang

Zhang

et al. 2017

Int J Coal Sci Technol

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For the thorough research on coal metamorphism impact on gas adsorption capacity, this paper collected and summarized parameters of experimental adsorption isotherms, coal maceral, proximate analysis and ultimate analysis obtained from National Engineering Research Center of Coal Gas Control and related literatures at home and abroad, systematically discussed the coal rank effect on its physicochemical properties and methane adsorption capacity, in which the coal rank was shown in Vitrinite reflectance, furthermore, obtained the Semi-quantitative relationship between physicochemical properties of coal and methane adsorption capacity.

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Characterization of Synthetic‐Coal Char Particles using fractal dimension analysis

Ludlow

Vosen²

1993

Part & Part Syst Charact

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The development and change of surface ruggedness in chars was studied at conditions typical in a pulverized coal furnace. The fractal dimension, a measure of surface ruggedness, of chars was measured using physisorption techniques. By adjusting the temperature encountered (1173 to 1773 K) and residence time (0.1 to 1.5 s) of the synthetic coal (sized to 46–106 μm diameter), chars at different stages of combustion were prepared in a laminar flow (drop‐tube) furnace. The particles were quickly cooled and quenched in an inert atmosphere. The samples were examined using a scanning electron microprobe, and their fractal dimensions were determined using gas physisorption. The adsorption data were used to test if the char surface was fractal on a molecular scale, to determine the fractal dimension, and to quantify changes in the fractal dimension during combustion. The fractal dimension of the unburned synthetic coal was approximately 2. The fractal dimension increased as high as 2.85 as the carbon matrix burned away and exposed mineral moieties. However, as combustion continued the carbon burned completely away leaving a mineral fly ash particle with a fractal dimension as low as 2.47.

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A fractal interpretation of the effect of drying on the pore structure of Victorian brown coal

Cited by 59 publications

References 6 publications

The Pore Structure in Processed Victorian Brown Coal

The Pore Structure in Processed Victorian Brown Coal

Effects of coal rank on physicochemical properties of coal and on methane adsorption

Characterization of Synthetic‐Coal Char Particles using fractal dimension analysis

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