溶融ウスタイトの水素による還元反応速度
1984 年 70 巻 14 号 p. 1689-1696
詳細
1984 年 70 巻 14 号 p. 1689-1696
The reduction rate of liquid wustite in contact with solid iron with inert gas(N2, Ar or He)-hydrogen mixture was measured by using the thermobalance at 1 400, 1 450°C.
(1) The apparent reduction rate of liquid wustite with hydrogen was proportional to PH2.
(2) The apparent reduction rate was affected by the gas flow rate over the range of this experiment. The rate of chemical reaction between liquid wustite and hydrogen was so fast that the overall reduction was controlled by mass transfer in the stagnant film of gas phase in the range of flow rate, V<4l/min(N2-H2 and Ar-H2 mixture) or V<7l/min(He-H2 mixture). However, in the range of V=728l/min with He-H2 mixture, reduction was controlled by both two steps, i.e., mass transfer in gas phase and chemical reaction at the interface. The chemical reaction rate at the interface was estimated to be 1.6×10-2(g-oxygen/cm2·s·atm).
(3) The chemical reaction rate estimated was about 20 times larger than that of solid wustite obtained in the present work.
