Date of Award
Doctor of Philosophy
The equilibrium hydrogen-methane compositions were determined for S.A.E. 1050 steel at 800 and 850 degrees centigrade and for 0.80 percent carbon spring steel at 750, 800, 850, and 900 degrees centigrade;All reactions were carried out at pressures slightly above one atmosphere and equilibrium constants were calculated on the basis of the partial pressures of the active gases and the mol fractions of the iron and iron carbide in the solid phase. The results obtained here were compared with the results of other investigators by calculating the methane-hydrogen equilibrium composition for one atmosphere;The heat effect at 850 degrees centigrade was found to be 23,500 calories for the reaction, 3Feg Inaustenite+CH4 &lrarr2;Fe3Cb Inaustenite +2H2. This value of the heat of reaction was obtained from the slope of the straight line drawn for a plot of log K against 1/T. A value of 14,700 calories was calculated for the heat effect for the reaction, 3Fea+CH 4&lrarr2;Fe3Ca +2H2 at 25 degrees centigrade. This calculation was based on the above heat effect at 850 degrees centigrade and heat capacity and transition data for the reactants and products over the temperature interval.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
C. F. Gray
Gray, C. F., "Equilibrium in the hydrogen-methane-steel system " (1942). Retrospective Theses and Dissertations. 13310.