Carbon-13 CP/MAS Study of Coal Macerals of Varying Rank

1981 ◽  
pp. 23-42 ◽  
Author(s):  
RONALD J. PUGMIRE ◽  
KURT W. ZILM ◽  
DAVID M. GRANT ◽  
STEPHEN R. LARTER ◽  
JAMES ALLEN ◽  
...  
Keyword(s):  
Coal Macerals

INFLUENCE OF COAL MACERALS ON BIOMETHANE PRODUCTION

2018 ◽  
Vol 17 (6) ◽  
pp. 1449-1456
Author(s):  
Daping Xia ◽  
Hongyu Guo ◽  
Yunsong Li ◽  
Shanlai Chen ◽  
Guojun Zhao
Keyword(s):  
Biomethane Production ◽  
Coal Macerals

Relationship of coal extraction with free radicals and coal macerals

1988 ◽  
Vol 18 (3) ◽  
pp. 279-286 ◽  
Author(s):  
Mohindar S. Seehra ◽  
Bikas Ghosh ◽  
John W. Zondlo ◽  
Eric A. Mintz
Keyword(s):  
Free Radicals ◽  
Coal Extraction ◽  
Coal Macerals ◽  
Relationship Of

scholarly journals Environmental Risk Related to the Exploration and Exploitation of Coalbed Methane

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6537
Author(s):  
Barbara Uliasz-Misiak ◽  
Jacek Misiak ◽  
Joanna Lewandowska-Śmierzchalska ◽  
Rafał Matuła
Keyword(s):  
Coalbed Methane ◽  
Environmental Risks ◽  
Risk Category ◽  
Burial History ◽  
Exploration And Exploitation ◽  
Coal Seams ◽  
Mining Operations ◽  
Environmental Threats ◽  
And Migration ◽  
Coal Macerals

In coal seams, depending on the composition of coal macerals, rank of coal, burial history, and migration of thermogenic and/or biogenic gas. In one ton of coal 1 to 25 m3 of methane can be accumulated. Accumulation of this gas is included in unconventional deposits. Exploitation of methane from coal seams is carried out with wells from mining excavations (during mining operations), wells drilled to abandoned coal mines, and wells from the surface to unexploited coal seams. Due to the low permeability of the coal matrix, hydraulic fracturing is also commonly used. Operations related to exploration (drilling works) and exploitation of methane from coal seams were analyzed. The preliminary analysis of the environmental threats associated with the exploration and exploitation of coalbed methane has made it possible to identify types of risks that affect the environment in various ways. The environmental risks were estimated as the product of the probability weightings of adverse events occurring and weightings of consequences. Drilling operations and coalbed methane (CBM) exploitation leads to environmental risks, for which the risk category falls within the controlled and accepted range.

Electrostatic Separation of Coal Macerals

1979 ◽  
Vol IA-15 (3) ◽  
pp. 291-293 ◽  
Author(s):  
John M. Anderson ◽  
Lubomir Parobek ◽  
Maurice A. Bergougnou ◽  
Ion I. Inculet
Keyword(s):  
Electrostatic Separation ◽  
Coal Macerals

Devolatilization Characteristics of Shenmu Coal Macerals and Kinetic Analysis

2006 ◽  
Vol 28 (9) ◽  
pp. 865-874 ◽  
Author(s):  
Qinglei Sun ◽  
Wen Li ◽  
Haokan Chen ◽  
Baoqing Li ◽  
Qinglei Sun
Keyword(s):  
Kinetic Analysis ◽  
Coal Macerals

Enrichment of coal macerals using froth flotation

2000 ◽  
Vol 17 (1) ◽  
pp. 56-61 ◽  
Author(s):  
J. P. Barnwal ◽  
Durga D. Patil ◽  
T. C. Rao ◽  
S. K. Kawatra
Keyword(s):  
Froth Flotation ◽  
Coal Macerals
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