Catalyst filling up design ones which are improved

摘要

As for the catalyst shell filler for the ammonia oxidation which includes andoriyutsuso method, 20 - 99% of the ammonia throughput which is designed oxidizing, unreacted ammonia, it includes the ammonia oxidation catalyst of the second stage which can produce the ammonia oxidation catalyst of the first stage which can form the first gradual product gas which contains oxygen, and nitrogen oxide, and to make the oxidation of unreacted ammonia cause completely. Regarding desirable execution feature, formation of nitrous oxide is level low, you can see the extent of campaign length. Also the fact that the efficiency for startup is improved, is other advantage of this invention.