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ECN publication
Direct catalytic decomposition and hydrocarbon-assisted catalytic reduction of N2O in the nitric acid industry
Brink, R.W. van den; Verhaak, M.J.F.M.; Gent, M.M.C.; Smit, A.W.
Published by: Publication date:
ECN 1-11-2000
ECN report number: Document type:
ECN-C--00-087 ECN publication
Number of pages: Full text:
31 Download PDF  

The nitric acid industry in the Netherlands is a major industrial sourceof nitrous oxide (N2O), an important contributor to the greenhouse effect. The project aims at determining the feasibility of the use of a catalyst developed by ECN for the direct decomposition of N2O and the Selective Catalytic Reduction (SCR) of N2O with natural gas in the off gas of a nitric acid plant. For plants with a tail gas temperature of at least 400C in front of the expander, direct decomposition is an economic option (from NLG 1 per ton CO2 equivalents removed). For plants with a temperature below 400C in front of the expander, SCR using natural gas can be used. More economic, however, is end-of-pipe SCR of N2O using 500 ppmv LPG (upwards of NLG 3 per ton CO2 equivalents removed). 9 refs.

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