| 摘要 |
The invention relates to a process for removing ammonia. It is provided that gaseous ammonia to be removed is fed, together with oxygen, in particular together with air, to at least one catalyst (8) which then gives off nitrogen and water. To remove ammonia from ammonia-containing waste water, in particular from the waste water of a power station, the ammonia, in a mass transfer column (2) is transferred from the water into a gas stream. A mixture of gaseous ammonia, oxygen and other gases is fed via a heat exchanger (6) and a heater (7) to the inlet of a catalyst (8). Instead of a catalyst (8), a combination of a noble metal catalyst (10) and a mixed oxide catalyst (11) can be used. Nitrogen and water are given off at the catalyst exit. To form a virtually closed gas circulation, the exit of the catalyst (8) or of the mixed oxide catalyst (11) is connected via the heat exchanger (6) and a fan (9) to the gas feedline (4) of the mass transfer column (2). <IMAGE>
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