Results 261 to 270 of about 26,083,278 (347)
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, 2021
: The dynamic evolution characteristics of fractures in coal under different compressive loads are of great significance to the recovery of coalbed methane (CBM). In this paper, the X-ray computer tomography (CT) detections of coal samples under uniaxial
Dengke Wang +5 more
semanticscholar +1 more source
: The dynamic evolution characteristics of fractures in coal under different compressive loads are of great significance to the recovery of coalbed methane (CBM). In this paper, the X-ray computer tomography (CT) detections of coal samples under uniaxial
Dengke Wang +5 more
semanticscholar +1 more source
Fuel, 2021
Spontaneous combustion of weathered coal is the main hazard in coal-rich countries which needs to be addressed. The exothermic behaviour of weathered coal on low-temperature oxidation was investigated in fresh and weathered coal during spontaneous ...
Song Jiajia +4 more
semanticscholar +1 more source
Spontaneous combustion of weathered coal is the main hazard in coal-rich countries which needs to be addressed. The exothermic behaviour of weathered coal on low-temperature oxidation was investigated in fresh and weathered coal during spontaneous ...
Song Jiajia +4 more
semanticscholar +1 more source
Proceedings of Fall Meeting of the Society of Petroleum Engineers of AIME, 1975
American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Discussion of this paper is invited. Three copies of any discussion should be sent to the Society of Petroleum Engineers office. Such discussion may be presented at the above meeting and, with the paper, may be considered for publication in one of the two SPE ...
John J. Kowalski, Milton E. Holter
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American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Discussion of this paper is invited. Three copies of any discussion should be sent to the Society of Petroleum Engineers office. Such discussion may be presented at the above meeting and, with the paper, may be considered for publication in one of the two SPE ...
John J. Kowalski, Milton E. Holter
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Critical particle size analysis of gas emission under high-temperature oxidation of weathered coal
, 2021A B S T R A C T To study the effects of particle size on gases emitted from weathered coal under high-temperature oxygen deficiency, we investigated the macroscopic spontaneous combustion characteristics of weathered coal with various particle sizes ...
Jiajia Song +5 more
semanticscholar +1 more source
, 2020
Scanning Electron Microscopy (SEM) and Atomic Force Microscope (AFM), two easily acquired and widely applied image acquisition and analysis methods, have rarely been combined to study the pore structure for unconventional natural gas reservoir rocks.
Yong Li +3 more
semanticscholar +1 more source
Scanning Electron Microscopy (SEM) and Atomic Force Microscope (AFM), two easily acquired and widely applied image acquisition and analysis methods, have rarely been combined to study the pore structure for unconventional natural gas reservoir rocks.
Yong Li +3 more
semanticscholar +1 more source
Thermal analysis of coal and water-coal suspensions
Coke and Chemistry, 2012Thermal analysis of coal and water-coal suspensions is discussed. It is found that coal of different ranks is characterized by different initial and final combustion temperatures.
A. N. Zaostrovskii +3 more
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Elemental analysis of coal and coal ASH by PIXE technique
Applied Radiation and Isotopes, 2012Coal and coal ash samples were characterized by particle induced X-ray emission spectroscopic technique. Sixteen elements, namely K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Rb, Sr, Y and Pb were quantified in this study. Elements like K, Ca, Ti and Fe were present as major elements, whereas, other elements like V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Rb,
K C, Patra +3 more
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Journal of Chemical Education, 2009
This lab experiment illustrates the use of thermogravimetric analysis (TGA) to perform proximate analysis on a series of coal samples of different rank. Peat and coke are also examined. A total of four exercises are described. These are dry exercises as students interpret previously recorded scans.
Craig J. Donahue, Elizabeth A. Rais
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This lab experiment illustrates the use of thermogravimetric analysis (TGA) to perform proximate analysis on a series of coal samples of different rank. Peat and coke are also examined. A total of four exercises are described. These are dry exercises as students interpret previously recorded scans.
Craig J. Donahue, Elizabeth A. Rais
openaire +1 more source
, 2020
Following the Paris climate agreement, a consensus has been made on the urgent need for increasing the use of clean energy and large-scale energy storage. This paper proposes a hybrid pumped-hydro energy storage system using goafs of abandoned coal mines.
Jinyang Fan +6 more
semanticscholar +1 more source
Following the Paris climate agreement, a consensus has been made on the urgent need for increasing the use of clean energy and large-scale energy storage. This paper proposes a hybrid pumped-hydro energy storage system using goafs of abandoned coal mines.
Jinyang Fan +6 more
semanticscholar +1 more source
2014
Coal is a non-uniform material with large inherent variability in composition, and other important properties, such as calorific value and ash fusion temperature. This quality variability is very important when coal is used as fuel in steam generators, since it affects boiler operation and control, maintenance and availability, and the extent and ...
Carlos E. Romero, Robert De Saro
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Coal is a non-uniform material with large inherent variability in composition, and other important properties, such as calorific value and ash fusion temperature. This quality variability is very important when coal is used as fuel in steam generators, since it affects boiler operation and control, maintenance and availability, and the extent and ...
Carlos E. Romero, Robert De Saro
openaire +1 more source