含锆熔铁催化剂还原动力学的研究

• 作 者: 刘征 王文祥 李凡
• 机 构: 郑州轻工业学院化工系,郑州大学化学系,郑州大学化学系,
• 出 处: 郑州大学学报(自然科学版)
• 发表日期: 1993年01期
• 关键词: 还原动力学 铁催化剂 球模型 还原反应 还原度 活化能 维氏体 还原性能 缓慢冷却 还原过程

通过对含锆熔铁催化剂的等温还原实验考察,发现在低温及反应初期符合收缩球模型,而在高温和反应主、后期符合立体网状模型,且熔体急骤冷却的催化剂(球形)对立体网状模型适合的范围较宽,而熔体缓慢冷却的催化剂(无定形)对收缩球模型适合范围较宽。根据实验结果,含 ZrO_2的熔铁催化剂不适合耶洛费夫方程。同时还发现还原反应的活化能随温度的范围不同而改变。

Through the isothermal reduction experiments on zirconium-containing molten iron catalysts, it was found that the shrinking spherical model was found at low temperature and in the initial stage of the reaction, while at the high temperature and in the main and late stages of the reaction, the catalyst (spherical) The mesh model is suitable for a wide range, whereas the catalyst (amorphous) slowly cooled by the melt is suitable for the shrink ball model. According to the experimental results, the molten iron containing ZrO_2 catalyst is not suitable for the Yelovef equation. It is also found that the activation energy of the reduction reaction varies with the temperature range.