Wet treatment method of gas containing nitrogen oxide

Abstract

Abstract PURPOSE: To efficiently absorb NOx, by converting NO in gas containing Nox into nitrite or nitrate N by contacting said gas with a treating liquid containing water- soluble phthalocyanin metallic complex compounds, heterocyclic compounds of amines or N and water. CONSTITUTION: Gas containing Nox is contacted with a treating liquid consisting of water-soluble phthalocyanin metallic complex compounds (For example, cobalet phthalocyaninsulfonic acid or its salt), which wt. % is not less than 0.005 - especially, not less than 0.1, heterocyclic compounds of amines (For example, monoethanol amine) or N, which wt. % is not less than 0.03 - especially, 1, and water in the remainder. An antifrothing agent is suitably added to the treating liquid as necessary and the liquid can prepare for the presence of SO 2 gas by adding SO 3 sources, such as, Na 2 SO 3 , etc. Denitration rate is changed into a stationary condition after a fixed time, activity is maintained in a stable condition for a long term and high denitration rate is held by using this treating liquid COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Shigeyoshi Ono
• 👤 Nobuo Tanaka
• 👤 Junzo Harada
• 👤 Keiji Ninomiya

Bibliographic Details