Journal Article10.1016/J.FUEL.2019.02.070
Insight into the macromolecular structural differences between hard coal and deformed soft coal
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TL;DR: In this article, Fourier transform infrared (FTIR) spectral and X-ray photoelectron spectrometer (XPS) measurements were conducted on soft and hard coals with metamorphism varying from bituminous coal to anthracite.
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About: This article is published in Fuel. The article was published on 01 Jun 2019. The article focuses on the topics: Bituminous coal & Anthracite.
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Citations
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.
136
Nanopore structure of deep-burial coals explored by AFM
TL;DR: In this article, an atomic force microscopy (AFM) measurement was conducted on 12 deep-burial coal samples with different ranks varying from bituminous C to anthracite, attempting to gain clearer insights into the nanopore characteristics and surface roughness.
124
The use of AFM in quantitative analysis of pore characteristics in coal and coal-bearing shale
TL;DR: In this paper, atomic force microscopy (AFM) experiments were performed on coal and coal-bearing shale samples, attempting to gain clearer insights into the nanopore characteristics and surface roughness.
115
Influences of hydraulic fracturing on microfractures of high-rank coal under different in-situ stress conditions
TL;DR: In this paper, high-rank coal samples from Chengzhuang and Sihe Mine were selected for hydraulic fracturing simulation experiments, using stereoscopic microfracture scanning and binarization image processing methods, and the mean aperture, surface density, connectivity, mean length and fracture porosity of micro-fractures were compared and analyzed under different in-situ stress conditions before and after hydraulic fracturing.
96
Mineral dissolution and pore alteration of coal induced by interactions with supercritical CO2
TL;DR: In this article , a comparison of pore fractal dimension has been made between raw coal and treated samples, suggesting that SC-CO2 interaction can enhance pore roughness and structure complexity.
85
References
Kerogen origin, evolution and structure
M. Vandenbroucke,C. Largeau +1 more
TL;DR: A review of the main advances in kerogen studies since the comprehensive synthesis edited by Durand [Durand, B. as discussed by the authors, 1980] can be found in this paper.
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FTIR study of the evolution of coal structure during the coalification process
TL;DR: A series of coals varying in rank from peat to semi-anthracite was studied by Fourier Transform infrared spectroscopy (FTIR) and curve-fitting analysis in order to gain additional information on coal structure and the main structural changes that take place during the coalification process.
813
The molecular representations of coal – A review
TL;DR: Between 1942 and 2010 there were >134 proposed molecular level representations (models) of coal, and while they spanned the rank range, bituminous representations are the bulk, with far fewer lignite, and very few subbituminous or anthracite representations.
642
Pore structure characterization of different rank coals using gas adsorption and scanning electron microscopy
TL;DR: In this paper, the pore geometry of coal samples with different metamorphism has been analyzed using low-pressure nitrogen gas adsorption (LP-N2GA) and scanning electron microscopy (SEM).
637
Concerning the Application of FT-IR to the Study of Coal: A Critical Assessment of Band Assignments and the Application of Spectral Analysis Programs
Paul C. Painter,Randy W. Snyder,Michael Starsinic,Michael M. Coleman,Deborah W. Kuehn,Alan Davis +5 more
TL;DR: In this article, the problems associated with the application of FT-IR to the characterization of coal structure are critically discussed and the controversies concerning band assignments are considered and it is concluded that the strong 1600 cm−1 band can be assigned to an aromatic ring stretching mode that in most coals is intensity enhanced by the presence of phenolic groups.
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