Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

Chapter 3140120Generation factor %1008060402000 10 20 30 40 50 60 70 80 90 100Progress of the campaign in %Figure 3.4: N 2 O generation in relation to the progress of a campaign[118, French Standardization, 2003]Pressure of NH 3 oxidation 1 3 – 7 8 – 12 barCatalyst layer 3 – 5 6 – 10 20 – 50Gas velocity 0.4 – 1.0 1 – 3 2 – 4 Meter/secondTemperature 840 – 850 850 – 900 900 – 950 ºCCatalyst loss 0.04 – 0.06 0.10 – 0.16 0.25 – 0.32 g/tonne HNO 3Campaign length 8 – 12 4 – 7 1.5 – 3 MonthsTable 3.9: Parameters of ammonia oxidation related to applied pressures[88, infoMil, 1999, 94, Austrian UBA, 2001]Achieved environmental benefits• optimised NO yield• minimisation of N 2 O formation.Cross-media effectsNone believed likely.Operational dataSee Table 3.9.Large Volume Inorganic Chemicals – Ammonia, Acids and Fertilisers 111