SCHEDULED MAINTENANCE
Gaseous cyanic acid (HNCO) is formed in the temperature range 513–666 K during the selective catalytic reduction of NOx with olefins (ethene, propene) over Cu/ZSM-5 under dry conditions, whereas with ammonia no HNCO is observed in the presence of water in the same temperature range; other by-products are hydrogen cyanide, formaldehyde, ethene (with propene as reducing agent), methane and 2-methylpent-1-ene.
F. Radtke, R. A. Koeppel and A. Baiker, J. Chem. Soc., Chem. Commun., 1995, 427 DOI: 10.1039/C39950000427
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