Catalyst for ammonia synthesis

Abstract

The invention relates to a catalyst for ammonia synthesis. The catalyst comprises nitrogen containing / hydrogen containing / nitrogen and hydrogen containing compounds of main group elements, and nitrides of transition metal VIII group elements as well as related carriers or additives. The product is a novel catalyst for ammonia synthesis, and has excellent catalytic activity in the reaction of ammonia synthesis, especially in a condition with relatively low temperature and low pressure (lower than 30 bar, and lower than 300 DEG C).

Description

technical field [0001] The invention relates to catalyst technology, especially a highly active catalyst for ammonia synthesis, which is suitable for catalyzing the synthesis of ammonia starting from the mixed gas of nitrogen and hydrogen. Background technique [0002] At present, the annual energy consumption of ammonia synthesis in the world accounts for about 1% of the world's energy consumption, which is mainly determined by the characteristics of the catalysts used in industry. Iron-based catalysts are mainly used in the industry (internationally, ferric oxide is the main component, and my country's original catalyst is ferrous oxide as the main component). This type of catalyst is based on aluminum oxide, potassium oxide, calcium oxide, And rare earth oxides as promoters. There are two main characteristics of iron-based catalysts: first, this type of catalyst needs to be operated under high temperature and high pressure conditions, which not only requires relatively hi...

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Problems solved by technology

[0003] Alkali metals and alkaline earth metals have been widely used as additives in ammonia synthesis catalysts, but most of them are added in the form of oxides. Although relatively good results have been achieved, the goal of achieving high activity under low temperature and low pressure conditions for catalysts has not yet been solved.

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