プロパンの発熱型雰囲気と鉄の平衡関係

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Carburizing or oxidizing equilibrium relations between solid iron and exothermic atmospheres of CO-CO_2-H_2-H_2O system which were converted from a mixture of propane and air by partial burning through a catalyzer chamber were studied by thermodynamic calculations and chemical analysis. The results obtained were summarized as follows. In the converted atmospheres, CO_2 and H_2O contents were increased and CO and H_2 contents were decreased by raising the mixing ratio of air to propane at a constant temperature. After heated with iron, CO and H_2O contents in an atmosphere converted at constant air ratio were increased and CO_2 and H_2 contents were decreased by raising heating temperature so as to approach the equilibrium condition of water-gas reaction. The calculated values of CO/CO_2 ratio in the exothermic atmospheres in equilibrium with iron were approximately in good agreement with the experimental values obtained from analysis of effluent gas from the heating furnace. The carbon potential of the single phase, either ferrite or austenite, in exothermic atmospheres was decreased by raising the ratio of air to propane and by increasing temperature at a constant air ratio. In general, the carbon potential of iron in exothermic atmospheres was very low. It was found that oxidation of iron in exothermic atmospheres converted at an air ratio higher than 16-17 (when cooled at 18° after converted at 1000°) was nearly independent of heating temperature in the range between 800℃ and 1000℃.
1962-10-01

プロパンの発熱型雰囲気と鉄の平衡関係

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