Abstract:

Ammonia synthesis is a high energy consumption process and it still has great energy-saving potential. Analysis of the distribution of consumption and loss of energy for the present ammonia synthesis industry indicates that the direction of energy-saving is reduction of power providing fuel consumption，i.e.，reduction of reaction pressure. The most potential energy-saving is the reforming section，and the emphasis of energy-saving is the processes with the highest irreversibility，such as combustion reaction，heat transfer process with a high difference in temperature. The key to and the basic way of energy-saving is adjusting the structure of raw materials and introducing high-efficiency ammonia synthesis catalysts，such as novel ZA-5-type Fe_1-xO-based catalyst and matching technology. In order to reduce energy-consumption of the present ammonia synthesis industry，we propose the use of ZA-5 catalyst for large-scale ammonia plant，and restructuring of medium and small-scale ammonia plants from high pressure to low pressure based on application of high-efficiency ammonia catalysts，and a combined production system of ammonia production and energy production based on clean coal gasification as its core technology.