Reduction of Ferric Oxide Pellets with Methane
Reduction of Ferric Oxide Pellets with Methane
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DOI：
10.2355/isijinternational1966.26.186
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发表时间：
1986
影响因子：
1.8
通讯作者：
D. Ghosh;A. K. Roy;A. Ghosh
中科院分区：
文献类型：
--
作者：
D. Ghosh;A. K. Roy;A. Ghosh
在 1073 至 1298K 的温度范围内，用甲烷对多孔和致密的氧化铁颗粒进行还原。从广义上讲，还原模式是拓扑化学的。除 1298K 外，还原时颗粒体积增加。颗粒中碳沉积的程度随着温度的升高而线性增加。在 1223K 时，CH4 的还原速率比 H2 的还原速率慢约 41/2 倍。整个反应可被认为是由 CH4 分解成 C 和 H2，以及由所得 H2 还原颗粒组成。发现分解反应主要控制总速率。 H2 对颗粒的还原似乎是由气体边界层中 H2 和 H2O 的反扩散控制的。
Reduction of porous and dense pellets of ferric oxide were carried out with methane in the temperature range of 1073 to 1298K. The reduction pattern was, broadly speaking, topochemical. Volume of pellets increased upon reduction except at 1298K. Extent of carbon deposition in pellets increased linearly with increasing temperature. Rate of reduction with CH4 was approximately 41/2 times slower as compared to that with H2 at 1223K. The overall reaction may be considered to consist of decomposition of CH4 into C and H2, and reduction of pellet by the resulting H2. The decomposition reaction was found to control the overall rate primarily. The reduction of pellet by H2 seems to be controlled by counter diffusion of H2 and H2O in the gas boundary layer.