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Kinetics of the Formation Reaction of Manganese Carbide Under Various Gases

机译：多种气体下碳化锰形成反应的动力学

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摘要

Carbothermic reduction of manganese oxide under various gases in the temperature range of 1273-1573 K in order to understand the formation reaction of manganese carbide is investigated. The experimental results indicate that the formation reaction of manganese carbide depends on the temperature, the CO partial pressure, and the activity of carbon. The reaction rate for Mn7C3 formation is shown to be correlated with the CO gas diffusivity of the atmosphere in that the CO partial pressure acts as the driving force for the formation reaction in question. Furthermore, the results indicate that the reaction rate of Mn7C3 formation under H-2 gas is significantly faster than that under He gas; that is because methane gas that is formed by the reaction between H2 with carbon accelerates the overall reduction process. On the other hand, a high CO partial pressure is shown to retard the formation reaction of Mn7C3.
机译：为了了解碳化锰的形成反应，研究了在1273-1573 K温度范围内的各种气体下氧化锰的碳热还原反应。实验结果表明，碳化锰的形成反应取决于温度，CO分压和碳的活性。 Mn7C3形成的反应速率与大气中CO气体的扩散率相关，因为CO分压充当了上述形成反应的驱动力。此外，结果表明在H-2气体下形成Mn7C3的反应速率明显快于在He气体下的反应速率。这是因为H2与碳之间的反应形成的甲烷气体会加速整个还原过程。另一方面，显示出高的CO分压会阻碍Mn7C3的形成反应。

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