GC determines BTUs
Conventionally, the heat value of a gas has been determined by use of a standard calorimeter. Scientists have now developed gas chromatography equipment for separation of the natural gas into its components: methane, ethane, propane, isobutane, n-butane, isopentane, n-pentane, hexanes, carbon dioxide, oxygen, and nitrogen. By assigning a heat value, related to the heat of combustion, to each component separated by the GC, and applying the peak heights for the respective components, they are able to assign a heat value to the gas mixture. All selling costs are based on the heating value--the therm basis (a therm is 10/sup 5/ BTU). By the GC method, one can assess heat values with a total analysis time of five to six minutes per sample. The accuracy of 1/sup 0///sub 0/ is well within the requirements for pipeline and wellhead measurements. Also, the small sample size permits ready storage and handling prior to analysis.
- OSTI ID:
- 5157618
- Journal Information:
- Ind. Res.; (United States), Journal Name: Ind. Res.; (United States); ISSN IDRSA
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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47 OTHER INSTRUMENTATION
ACCURACY
CHROMATOGRAPHY
COMBUSTION HEAT
ECONOMICS
ENERGY
ENERGY SOURCES
ENTHALPY
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS CHROMATOGRAPHY
GAS FUELS
GASES
HEAT
HYDROCARBONS
MEASURING METHODS
NATURAL GAS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
SEPARATION PROCESSES
THERMODYNAMIC PROPERTIES