Abstract: The development of the A301 based on Fe 1-x O ammonia synthesis catalyst has for the first time allowed ammonia to be made economically at pressure close to those of gas production.The high activity and long life of the catalyst has been proved over a period of nine years in hundreds of 150-500t/d scale converter charges.In this paper,the activity test of A301 catalyst for use at low pressure was carried out in a equipment,called"sidestream"reactor,in which the catalyst was present as a packed bed of commercial-sized material and was subjected to 1000t/d scale plant conditions.The main results of the use of the sidestream reactor for the testing of catalysts are as follows:the outlet ammonia concentrations of the sidestream reactor under plant conditions are 14.35%-16.55%,15.24%-16.66% and 17.2%-18.8% by volume at 7.0,8.5 and 10.0MPa of pressure respectively.A301 is the most active of all iron catalysts tested for low pressure and low temperature operation and is the only catalyst that has been demonstrated to work efficiently at pressures in the region of 7-10MPa.

摘要： 原粒度A30 1催化剂在大型合成氨厂实际工况条件下的工业旁路试验结果表明 :在 7.0～ 7.5MPa等压合成氨工艺条件下 ,A30 1催化剂的氨净值为 10 %～ 12 % ,在 8.5MPa或 10MPa微加压合成氨工艺条件下 ,氨净值可达 12 %～ 15 % ,可以满足合成氨工业经济性对氨净值的要求 .因此采用A30 1催化剂实现等压或微加压合成氨是可行的 ,并可获得显著的经济效益