Method for synthetic ammonia

Abstract

A process for synthesizing ammonia includes such steps as heating the RE metal (or alloy) powder or block to the temp higher than the hydrogenation temp in the atmosphere preventing oxidizing and nitriding, introducing hydrogen gas to make the RE metal (or alloy) absorb hydrogen, introducing the mixture of oxygen and nitrogen gases or air, and chemical reaction. Its advantages are simple process and saving energy.

Description

Technical field: [0001] The invention belongs to the technical field of ammonia preparation. Background technique: [0002] In the early 20th century, Harber and Mittasch developed iron catalysts for the synthesis of ammonia, which laid the foundation for the industrial synthesis of ammonia. At present, the industrial production of ammonia is realized under the condition of 100-600 atmospheric pressure and 400-600° C. under the action of a catalyst to make hydrogen and nitrogen. In order to further reduce the reaction temperature and pressure, countries all over the world have never stopped the research and development of ammonia synthesis catalysts for a long time. In 1972, Aika et al. found that the ruthenium catalyst supported by activated carbon had high activity for ammonia synthesis. After the 1980s, the British BP company started to develop industrialized ruthenium catalyst with high activity. However, at present, countries in the world have not been able to develop...

AI Technical Summary

Problems solved by technology

However, neither the traditional Fe-based catalysts nor the newly developed Ru-based catalysts in the past 20 years can effectively reduce the synthesis temperature and pressure, let alone realize the synthesis of ammonia under normal temperature and pressure.