What is synthesis technology in the ammonia process

Ammonia synthesis is the production of ammonia from qualified hydrogen and nitrogen gas in the presence of an ammonia catalyst. The synthesis circuit consists of: fresh gas replenishment, synthesis reaction, reaction heat recovery, ammonia separation, inert gas venting, and un-reacted gas pressurization cycle. From the viewpoint of reaction kinetics, it is advantageous to increase the synthesis pressure, but increasing the pressure will increase the power consumption of the compressor, so the choice of synthesis pressure is an economic issue, and the selection of compressor and ancillary equipment has an important relationship.

At present, the international ammonia synthesis to the direction of low-pressure development, from the seventies of 14.5Mpa, reduced to ~ 10.0Mpa, so that the power is more economical, easy to manufacture equipment. Ammonia synthesis research in various countries is another issue is how to improve the efficiency of ammonia synthesis, improve the net value of ammonia, reduce the resistance of the synthesis circuit, the development of axial radial tower, radial tower, molecular sieve drying and purification of syngas and other energy-saving technologies, such as Topsoe's Topsoe-200, Topsoe-250 Casali ammonia synthesis as well as Kellogg's company, the British Chemical Corporation, such as development of the technology, and so on.

Domestic ammonia synthesis technology in recent years has also been a great development, NANCHENG Group Research Institute, Nanjing Guochang Chemical Technology Co., Ltd. developed GC-type high-pressure, low-pressure ammonia synthesis process, NC-type synthesis tower, Hunan Anchun Technology Co., Ltd. developed the mountain J cold-excited type, mountain J axial-radial synthesis tower technology, and so on.