How Should Nitric Acid Plants Monitor N2o Emissions Under The EU ETS

 Nitric acid plants can produce rapidly changing nitrous oxide emissions, particularly when production load or abatement performance changes. If the monitoring system cannot capture these variations, annual greenhouse-gas reports may understate important operating periods or rely on data that is difficult to defend. A complete monitoring design must therefore measure both concentration and the gas quantity needed to calculate emissions.

For covered EU installations, nitric acid production must use continuous emissions measurement for N₂O. The system should determine representative N₂O concentration after any relevant abatement equipment, combine it with flue-gas flow, cover both abated and unabated conditions, and produce validated mass-emission data for reporting.