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研究了球形氨合成催化剂中水溶性钾的作用及不同条件下钾的溶出速率。实验结果表明:水溶性钾的损失将导致催化剂活性的降低;在水中催化剂钾的溶出速率与催化剂的组成、外形、制造工艺、颗粒大小及水的温度和水中K_2CO_3浓度的大小有密切关系。在测定了不同催化剂样品的水溶性钾含量后,提出了球形氨合成催化剂在水中钾溶出速率方程式。求出溶出过程的活化能为4700卡/克分子。
The effect of water-soluble potassium in spherical ammonia synthesis catalyst and the dissolution rate of potassium under different conditions were studied. The experimental results show that the loss of water-soluble potassium will lead to the decrease of catalyst activity. The dissolution rate of potassium in water is closely related to the composition, shape, manufacturing process, particle size, water temperature and K 2 CO 3 concentration in water. After determining the water-soluble potassium content of different catalyst samples, the equation of potassium dissolution rate of spherical ammonia synthesis catalyst in water was proposed. The activation energy of the dissolution process was found to be 4700 cal / mol.