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Mining Publication: The Composition of Coalbed Gas
Keywords: Coal Gases
Original creation date: January 1973
Authors: AG Kim
Report of Investigations - January 1973
Download PDF Document (0.34 MB)
NIOSHTIC2 Number: 10000604
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7762, 1973 Jan; :1-9
Samples of gas were obtained directly from the coalbed during drilling of horizontal and vertical boreholes in six different formations. The samples were analyzed by gas chromatography for C1 to C5 hydrocarbons and for 02, N2, H2, He, and CO2. Methane in the gas varied from 63 to 99 percent; carbon dioxide from 0.1 to 15 percent. The CH4/CO2 ratio varied and showed no apparent correlation with age, rank, or bed. The majority of samples contained ethane, propane, and butane; hydrogen and helium were found in some samples. Oxygen and nitrogen were usually present, possibly as a result of air contamination. A more extensive sampling program would be necessary to establish a relationship between the amount and composition of the gas in the coalbed and other factors.
Image of publication The Composition of Coalbed GasReport of Investigations - January 1973
Download PDF Document (0.34 MB)
NIOSHTIC2 Number: 10000604
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7762, 1973 Jan; :1-9
See Also
Effect of Coal Type and Oxyfuel Combustion Parameters on Pulverised Fuel Ignition
Gas Sorption and Transport in Coals: A Poroelastic Medium Approach
Geology and Gas Content of Coalbeds in Vicinity of Bureau of Mines, Bruceton, Pa.
The Limiting Oxygen Concentration and Flammability Limits of Gases and Gas Mixtures
Methane Diffusion Parameters for Sized Coal Particles: A Measuring Apparatus and Some Preliminary Results
Methane Emissions from Gassy Coals in Storage Silos
The Modified Direct Method: A Solution for Obtaining Accurate Coal Desorption Measurements
Reconciling Longwall Gob Gas Reservoirs and Venthole Production Performances Using Multiple Rate Drawdown Well Test Analysis
Reducing Hazards in Underground Coal Mines Through the Recognition and Delineation of Coalbed Discontinuities Caused by Ancient Channel Processes
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Page last reviewed: March 30, 2017
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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