DUO NA dual-pressure nitric acid production technology
GIAP’s DUO NA dual-pressure nitric acid production technology sized up to 1500 tpd
The nitric acid technology is based on catalytical oxidation of ammonia with atmospheric oxygen and further adsorption of resulting nitrogen oxides with water. A distinctive feature of the technology is the use of different pressures at ammonia oxidation and nitrogen oxides absorption stages.
DUO NA nitric acid technology includes the following process stages:
1. Air compression.
2. Ammonia oxidation in catalytic reactor.
3. Nitrous gas compression.
4. Nitrogen oxides absorption to produce nitric acid.
5. Catalytical treatment of off-gases.