Journal ArticleDOI
Characteristics of pore structure and fractal dimension of low-rank coal: A case study of Lower Jurassic Xishanyao coal in the southern Junggar Basin, NW China
Haijiao Fu,Dazhen Tang,Ting Xu,Hao Xu,Shu Tao,Song Li,Zhenyong Yin,Baoli Chen,Cheng Zhang,Linlin Wang +9 more
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TLDR
In this paper, a series of laboratory experiments were performed to firstly analyze the characteristics of the pore structure in low-rank coal (R o 1000nm), with a poor development of mesopores (100-1000nm).About:
This article is published in Fuel.The article was published on 2017-04-01. It has received 211 citations till now. The article focuses on the topics: Fractal analysis & Fractal dimension.read more
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Estimation and modeling of pressure-dependent gas diffusion coefficient for coal: A fractal theory-based approach
Yun Yang,Shimin Liu +1 more
TL;DR: In this article, a fractal pore-structure-based model was proposed to estimate the pressure-dependent diffusion coefficient for fractal porous coals, where the proposed model dynamically integrates Knudsen and bulk diffusion influxes to define the overall gas transport process.
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Adsorption pore structure and its fractal characteristics of coals by N2 adsorption/desorption and FESEM image analyses
TL;DR: In this article, the fractal dimension of pore shape was obtained from FESEM images and ranges from 1.068 and 1.30, indicating the adsorption pore shapes are relatively regular.
Journal ArticleDOI
Pore Structure Characterization of Different Rank Coals Using N2 and CO2 Adsorption and Its Effect on CH4 Adsorption Capacity: A Case in Panguan Syncline, Western Guizhou, China
TL;DR: In this paper, the pore structure characteristics of different coal ranks in Panguan syncline, both N2 adsorption-desorption (LP-N2GA) and CO2 adaption-CO2GA were carried out with the goal of revealing the differentiation evolution of total pore volume (TPV), specific surface area (SSA), pore size distribution (PSD), and pore shape of 14 coal samples, and the influences of SSA to adsorptive capability at different sizes (supermicroporous < 2 nm,
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In-situ stress measurements and stress distribution characteristics of coal reservoirs in major coalfields in China: Implication for coalbed methane (CBM) development
TL;DR: In this article, the authors measured at depths from 135.9 to 1407.19m in 15 coalbed methane (CBM) development blocks in China, correlations between parameters including reservoir pressure, closed-in pressure, breakdown pressure, in-situ stress, coal permeability, and depth were determined.
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Combining pressure-controlled porosimetry and rate-controlled porosimetry to investigate the fractal characteristics of full-range pores in tight oil reservoirs
Xixin Wang,Jiagen Hou,Suihong Song,Dongmei Wang,Lei Gong,Ke Ma,Yuming Liu,Yongqiang Li,Lin Yan +8 more
TL;DR: In this paper, the fractal characteristics of full-range pores in Lucaogou tight oil reservoir, scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) were used to obtain the pore size.
References
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Journal ArticleDOI
Adsorption of Gases in Multimolecular Layers
Journal ArticleDOI
Microfluidics: Fluid physics at the nanoliter scale
Todd M. Squires,Stephen R. Quake +1 more
TL;DR: A review of the physics of small volumes (nanoliters) of fluids is presented, as parametrized by a series of dimensionless numbers expressing the relative importance of various physical phenomena as mentioned in this paper.
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Recommendations for the characterization of porous solids (Technical Report)
Jean Rouquerol,D. Avnir,C. W. Fairbridge,D. H. Everett,J. M. Haynes,N. Pernicone,J. D. F. Ramsay,Kenneth S. W. Sing,Klaus K. Unger +8 more
TL;DR: In this article, the authors present a tool for the selection and appraisal of the methods of characterization of porous solids, and also give the warnings and guidelines on which the experts generally agree.
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Coalbed methane: A review
TL;DR: In this paper, it is shown that the micropores are where most methane adsorption occurs in coal seams, and the methane molecule may actually stretch, minutely, the pore and thus with de-gassing of the reservoir, could result in matrix shrinkage, allowing opening of the fracture (cleat) system in the coal and thus enhancing permeability.
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Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR)
TL;DR: Wang et al. as mentioned in this paper proposed a new NMR-based per-meability model that better estimates the permeability of coals, which has potential applications for NMR well logging in coalbed methane exploration.