Intermediary in low-pressure ammonia synthesis catalyst reduction technology

Thread Content

The reduction of ammonia synthesis catalysts is an important step in ammonia synthesis production, and the pressure level during this reduction process is a key factor that determines the service life and activity of the catalysts, as well as the specific consumption of ammonia and the production capacity of the ammonia synthesis plant. Under normal circumstances, both the recommendations from catalyst manufacturers and the reduction pressure specifications for ammonia synthesis catalysts in ammonia plants are around 5 MP. Through relevant calculations, as well as coordination and verification of the on-site equipment, this indicator can be reduced by half. In this way, the residence time of steam in the reducing gas for ammonia synthesis catalysts can be reduced by half in the synthesis tower. In other words, the probability of the ammonia synthesis catalyst being damaged by steam in the reducing gas is reduced by half. The activity of the synthetic ammonia catalyst after final reduction is significantly increased. This is particularly evident for iron-based synthetic ammonia catalysts. Because the effluent temperature of iron-based ammonia synthesis catalysts is low, and the effluent flow rate is high during the main effluent period, if this steam cannot be removed from the tower in a timely manner, the ammonia synthesis catalyst will suffer severe contamination. This is also a major reason why many temperature-controlled ammonia synthesis catalysts fail to demonstrate their advantages in actual production. Although catalyst manufacturers currently widely use pre-reduced catalysts to replace in-situ reduction, due to objective constraints, the use of pre-reduced catalysts can only shorten the catalyst’s heating and reduction time; it cannot change the fact that the catalyst’s activity after reduction does not reach the desired level. This is also why the reduction of ammonia synthesis catalysts under low pressure is not merely a modification of a reduction parameter, but rather becomes an important aspect of the technology involved in ammonia production. Moreover, this pressure indicator cannot be reduced simply by wishing to do so, as it is influenced by various factors. The reduction technology for low-pressure ammonia synthesis catalysts can not only determine the appropriate pressure for reducing ammonia synthesis catalysts based on the capabilities of the on-site ammonia synthesis plant, with the support of basic chemical engineering data, but also provide specific control measures. If implemented, this technology will undoubtedly demonstrate its extraordinary unique appeal and significant economic benefits. It will also provide a fair assessment of synthetic ammonia catalysts from some low-temperature brands, revealing their true high-quality qualities.