| 摘要 |
The invention relates to a process for the removal of NO and NO2 from an oxygen-containing gas stream, which comprises a scrubbing step in which the gas stream is brought into contact with an ammonia-containing scrubbing solution, NO is oxidized to form NO2 by means of the oxygen present at a pressure of at least 2 bar and temperatures of from 15� C. to 60� C. and at least part of the NO2 present in the gas stream is converted by means of the ammonia-containing scrubbing solution into ammonium nitrite and a downstream decomposition step in which the ammonium nitrite present in the scrubbing solution is thermally decomposed into elemental nitrogen and water, where the decomposition step is carried out at temperatures of from 121� C. to 190� C. and a pressure of from 2 to 40 bar. The invention likewise relates to a plant for operation of the process of the invention. |
