Preparation method and application of synthetic ammonia catalyst

Abstract

The invention relates to the technical field of synthetic ammonia catalysts, in particular to a preparation method and application of a synthetic ammonia catalyst, the synthetic ammonia catalyst comprises MHO, M = Al, Ga, Sc or Y. Ru ions are introduced into the MHO, and Ru / MHO with catalytic activity is obtained through reduction. The synthetic ammonia catalyst is a novel catalytic material for stably and efficiently synthesizing ammonia at 300-500 DEG C and 0.1-5 MPa, and the novel catalytic material has remarkable economic benefits compared with a traditional noble metal catalyst. In addition, according to the synthetic ammonia catalyst, Ru / MHO with catalytic activity is obtained through reduction after Ru ions are introduced into MHO, the dosage of the needed synthetic ammonia catalyst is very small (0.1%-1%), compared with a first-generation alkali metal catalyst or an alkali metal compound catalyst, namely a Fe3O4-based molten iron catalyst, the content of the synthetic ammonia catalyst is as high as 90%, and meanwhile, the synthetic ammonia catalyst further contains oxide promoters of various metals such as Al, K, Ca and Mg. Through detection, the dosage of the compound is 0.1-1% of that of the original alkali metal, alkali metal compound or alkaline earth metal compound.

Description

technical field [0001] The invention relates to the technical field of synthetic ammonia catalyst, in particular to a preparation method and application of a synthetic ammonia catalyst. Background technique [0002] Ammonia synthesis is the most basic process in the chemical industry and the Haber-Bosch method, and iron oxide catalysts and potassium hydroxide promoters are widely used. This method has not changed in more than 100 years. Ammonia synthesis in the Haber-Bosch method is mainly carried out at high temperature (300°C-500°C) and high pressure (20-40MPa) using N 2 and H 2 Synthesized on the catalyst surface. The ammonia synthesis reaction uses N 2 and H 2 As a starting material, it is expressed as, however, this reaction is a thermodynamic reaction, therefore, in order to better shift the equilibrium to the right, it is better to take a low temperature. [0003] However, N≡N is extremely inert, so the reaction between nitrogen and hydrogen is extremely slow. ...

AI Technical Summary

Problems solved by technology

[0003] However, N≡N has an extremely inert nature, so the reaction between nitrogen and hydrogen is extremely slow

Images