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以半连续进料方式在高压搅拌釜中对氢氧化钙羰基化反应进行了系统的研究。采用XRD对反应产物进行了定性分析,证明反应生成物为甲酸钙和极少量的碳酸钙。与生成甲酸钙的主反应相比,生产碳酸钙的副反应速率较小可以忽略。考察了反应工艺条件对反应的影响,结果表明,转速达到1 000 r/min时,可以消除外扩散的影响。在反应温度423~453 K、压力2.0~3.5 MPa、不同氢氧化钙初始浓度下对反应进行考察,使用幂函数形式的动力学模型对实验数据进行拟合,结果表明,该反应对CO为一级反应,反应活化能为54.7 k J·mol-1。通过模型计算结果与实验数据的比较,证明该模型具有较好的实用性。
The carbonylation of calcium hydroxide was studied systematically in a high pressure stirred tank with semi-continuous feed. The reaction products were qualitatively analyzed by XRD, which proved that the reaction products were calcium formate and a very small amount of calcium carbonate. The side reaction rate for the production of calcium carbonate is negligible compared to the main reaction for the generation of calcium formate. The effects of reaction conditions on the reaction were investigated. The results show that the effect of external diffusion can be eliminated when the rotational speed reaches 1 000 r / min. The reaction was investigated under the reaction temperature of 423-453 K, pressure of 2.0-3.5 MPa and initial concentration of calcium hydroxide. The kinetic model of the power function was used to fit the experimental data. The results showed that the reaction of CO Reaction, the activation energy is 54.7 kJ · mol-1. The results of the model comparison with the experimental data show that the model has good practicability.