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单词 Ostwald process
释义
Ostwald process

Chemical Engineering
  • A catalytic process used for the production of nitric acid by the oxidation of ammonia with air. The first step involves mixing air as a supply of oxygen and ammonia over a catalyst at a temperature of 700ºC:

    4NH3+5O2=6H2O+4NO

    The gases are then cooled in two towers and the oxidation is completed as:

    2NO+O2=2NO23NO2+H2O=2HNO3+NO

    The NO is in part reoxidized to form more nitric acid in successive repetitions of the process. It is named after German chemist Friedrich Wilhelm Ostwald (1853–1932).


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