International Journal of Thermophysics

, Volume 8, Issue 1, pp 133–145 | Cite as

Experimental determination and modeling of the heat capacity of coal in various atmospheres

  • J. E. Callanan
  • S. A. Sullivan
  • R. A. MacDonald


During the development of transferable measurement techniques for the heat capacity of raw coal, it was observed that the atmosphere in sealed sample cells affected the thermal behavior, particularly during the initial measurements. The model which had been used to represent the specific heat of coal did reproduce the results in air but failed to reproduce the deep exotherm of the thermograms obtained in nitrogen. The specific heat of coal has been determined in helium, argon, and carbon monoxide to provide insight into possible modifications to the model. The results of initial and repeat runs in the five different atmospheres and the impact of these results on the modeling are presented and discussed. The agreement between the experimental heat capacity and that predicted by the model, up to 500 K, is excellent and supports Merrick's predictions for the heat capacity of coal.

Key words

atmospheric effects coal heat capacity modeling water desorption 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    J. E. Callanan, National Bureau of Standards (U.S.), NBSIR 82-1666 (1982).Google Scholar
  2. 2.
    J. E. Callanan and S. A. Sullivan, Recommended Procedures for Measuring the Heat Capacity of Coal (in press).Google Scholar
  3. 3.
    D. Merrick, Fuel 62:534 (1983); 62:540 (1983).Google Scholar
  4. 4.
    D. Merrick, Thesis (University of London, London, 1977).Google Scholar
  5. 5.
    B. J. Filla and J. E. Callanan, Rev. Sci. Instr. 56:592 (1985).Google Scholar
  6. 6.
    D. A. Ditmars, S. Ishihara, S. S. Chang, and G. Bernstein, J. Res. Natl. Bur. Stand. (U.S.) 87:159 (1982).Google Scholar
  7. 7.
    J. E. Callanan and S. A. Sullivan, Development of Standard Operating Procedures for Differential Scanning Calorimeters, Rev. Sci. Instr. 57 (1986).Google Scholar
  8. 8.
    K. Klabunde, Fuel Process. Technol. 4:73 (1981).Google Scholar
  9. 9.
    C. T. Ratcliffe, In press.Google Scholar
  10. 10.
    R. W. Carling, R. W. Mar, and A. S. Nagelberg, ACS Fuel Div. Preprints 28:223 (1983).Google Scholar
  11. 11.
    N. I. Voina and D. N. Todor, in Analytical Methods for Coal and Coal Products, Vol. 2, C. Karr, Jr. ed. (Academic Press, New York, 1978), pp. 619–648.Google Scholar
  12. 12.
    M. J. Richardson, Anal. Proc. 22:46 (1985).Google Scholar
  13. 13.
    J. M. Singer and R. P. Tye, Bur. Mines RI 8364 (1979).Google Scholar
  14. 14.
    R. A. MacDonald, J. E. Callanan, and S. A. Sullivan, High Temp. High Press. 17:387 (1985).Google Scholar
  15. 15.
    H. D. Glass, Econ. Geol. 49:294 (1954).Google Scholar
  16. 16.
    N. Berkowitz, Fuel 36:355 (1957).Google Scholar
  17. 17.
    S. S. Barton, M. J. B. Evans, J. Holland, and J. E. Koresh, Carbon 22:265 (1984).Google Scholar
  18. 18.
    P. Norden and N. W. Bainbridge, Fuel 62:619 (1983).Google Scholar
  19. 19.
    E. A. Sondreal and R. C. Elllman, Bureau of Mines RI 7887 (1974).Google Scholar
  20. 20.
    D. N. Furlong, F. Rouquerol, J. Rouquerol, and K. S. W. Sing, J. Chem. Soc. Faraday I 76:774 (1980).Google Scholar
  21. 21.
    O. P. Mahajan, A. Tomita, and P. L. Walker, Jr., Fuel 55:63 (1976).Google Scholar
  22. 22.
    J. A. Gutierrez-Rodriquez and F. F. Aplan, Colloids Surfaces 12:27 (1984).Google Scholar
  23. 23.
    L. G. Benedict and W. F. Berry, BCR, Inc., publication, 300 Hochberg Rd., Monroeville, Pa. (1964).Google Scholar
  24. 24.
    R. R. Ducher, M. E. Gunter, J. C. Crelling, and W. E. Brouer, GRI Report, NTIS PB86-103876.Google Scholar
  25. 25.
    J. F. Fryer and A. J. Szladow, Alberta Sci. Council Info. Ser. 66:1 (1973).Google Scholar

Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • J. E. Callanan
    • 1
  • S. A. Sullivan
    • 1
  • R. A. MacDonald
    • 2
  1. 1.Chemical Engineering Science DivisionNational Bureau of StandardsBoulderUSA
  2. 2.Thermophysics DivisionNational Bureau of StandardsGaithersburgUSA

Personalised recommendations