STP809

    Heating Values of Natural Gas and Its Components: Conversion of Values to Measurement Bases and Calculation of Mixtures

    Published: Jan 1983


      Format Pages Price  
    PDF Version (312K) 21 $25   ADD TO CART
    Complete Source PDF (5.4M) 21 $55   ADD TO CART


    Abstract

    The standard enthalpies of combustion of the pure hydrocarbons C1 to C6 at 298.15 K and 101.325 kPa, selected from the literature, with reference to a more detailed document, are used to derive heating values for the ideal gas and the real gas on molar, mass, and volumetric bases at five reference conditions, involving other temperatures and pressures. The values can be obtained at both dry and water-saturated conditions. The second virial coefficients and their first derivatives are used to calculate the effects of nonideality. Procedures are given and illustrated for calculating the heating values of mixtures from the composition, and the data are given for the pure compounds. The relationships between the quantities presented in the tables are illustrated by charts. A procedure is given for estimating the uncertainties of the calculated results.

    Keywords:

    alternative fuels, heating value, calorific value, enthalpy of combustion, hydrocarbon gases, gaseous fuel mixtures, real gas, ideal gas, reference measurement conditions


    Author Information:

    Armstrong, GT
    Supervisory research chemist (now deceased) and research chemist, National Bureau of Standards, Washington, D.C.

    Jobe, TL
    Supervisory research chemist (now deceased) and research chemist, National Bureau of Standards, Washington, D.C.


    Paper ID: STP29515S

    Committee/Subcommittee: D02.E0

    DOI: 10.1520/STP29515S


    CrossRef ASTM International is a member of CrossRef.