PRODUCTION OF AMMONIA - OCI Nitrogen

ACGIH [4] occupational exposure limits for ammonia and other components associated
with ammonia production are given in the table below. All the figures are ppmv:-
Component TLV-TWA (8hr) TLV-STEL (15min)
NH 3 25 35
NO 2 3 5
SO 2 2 5
H 2 S 10 15
CO 50 400
CO 2 5,000 30,000
The figures are subject to updating and may vary between European countries.
Full health and safety information is given in Safety Data Sheets which must be available
and updated. General product information on ammonia is given in Appendix 2.
Ammonia plants have high technological standards and need professional management,
operating and maintenance working routines and personnel. Precautions taken to prevent
accidents and injuries during operation are incorporated in the operating and safety procedures
for the plant.
8. SUMMARY OF BAT EMISSION LEVELS
8.1 Achievable Emission Levels for New Plants
The following emission levels can be achieved for new ammonia plants. These levels relate to
steady-state production, not accounting for peaks which can occur during the unsteady transient
conditions of start-up and shut-down and during emergencies.
8.1.1 Emissions into air
ppmv mg.Nm-3 kg.t-1 of product
NOx (as NO2 at 3% O2 ) 75 150 0.45
SO2 (partial oxidation plants): as for combustion plants.
8.1.2 Emissions into water
NH 3 or NH 4 (as N) 0.1kg.t -1 of product
8.1.3 Waste material
Spent catalysts etc.