ECN publicatie:
Combined catalytic removal of N2O and NOx from the tail gases of a nitric acid plant
Gepubliceerd door: Publicatie datum:
ECN SF 1-4-2001
ECN publicatienummer: Publicatie type:
ECN-RX--01-012 Conferentiebijdrage
Aantal pagina's: Volledige tekst:
15 Download PDF  (78kB)

Gepresenteerd op: NOXCONF 2001. International Conference on Industrial Atmospheric Pollution. NOx and N2O control : panel of available techniques, Paris la Défense, France, 21-22 maart 2001.

Nitrous oxide (N2O) is a greenhouse gas with a high global warming potential. The nitric acid industry is a major source of N2O. ECN developed a technique for the catalytic removal of N2O from the tail gases of a nitric acid plant. The most cost effective method for N2O abatement is direct decomposition (0.3 to 1 EUR/ton CO2 equivalents removed). However, this techique can only be used when the tail gas temperature is higher than 400 degrees C. Selective catalytic reduction (SCR) of N2O with LPG can be used in plants with a tail gas temperature below 400 degrees C. The use of a reductant makes this method more expensive; the cost is 1.3 to 2 EUR/ton CO2 equivalents removed. Combination of N2O removal with the destruction of N)x in a single reactor is an opportunity to improve the overall cost effectiveness.

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