Project description:

Nitrous Oxide (N2O) is an undesired by-product gas from the manufacture of nitric acid. Nitrous oxide is formed during the catalytic oxidation of Ammonia. Over a suitable catalyst, a maximum 98% (typically 92-96%) of the fed Ammonia is converted to Nitric Oxide (NO).

The remainder participates in undesirable side reactions that lead to the production of Nitrous Oxide, among other compounds. Waste N2O from nitric acid production is typically released into the atmosphere, as it does not have any economic value or toxicity at typical emission levels. N2O is an important greenhouse gas which has a high Global Warming Potential (GWP) of 310.

The project activity involves the installation of a secondary catalyst to abate N2O inside the reactor once it is formed.

The baseline scenario is determined to be the release of N2O emissions to the atmosphere at the currently measured rate, in the absence of regulations to restrict N2O emissions. If regulations on N2O emissions are introduced during the crediting period, the baseline scenario shall be adjusted accordingly.

The project activity will contribute to the sustainable development of the country through industrial technology transfer (catalyst technology from a developed country to Colombia). The project activity will reduce N2O emissions and will not increase nor decrease direct emissions of other air pollutants.

This project advances the following United Nations Sustainability Development Goals:

Standard of issuance:


AM0028 ver. 4 – Catalytic N2O destruction in the tail gas of Nitric Acid or Caprolactam Production Plants
AM0034 ver. 2 – Catalytic reduction of N2O inside the ammonia burner of nitric acid plants

Amount of reduction:

122050 tCO2/year

Service offered:



Nitrous Oxide Abatement. CDM Post-Registration


June 2019