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NOx Gas

NOx gases are mainly caused by car/vehicle pollution, and are mainly composed of nitrogen monoxide and nitrogen dioxide.

These gases are responsible for smog, acid rain, and ground-level ozone.

They are one of the most dangerous groups of pollutants, breathing in these gases has negative effects on our bodies. It reduces oxygen levels in the blood, and can cause inflammation in the respiratory tract, allergies, bronchitis and asthma attacks. It also causes environmental damage.


Although different types of nitrogen oxides are present in the atmosphere, as far as air pollution is concerned, the term NOx refers to the weighted sum of nitrogen monoxide (NO) and nitrogen dioxide (NO2).

Nitrogen oxide (NO) is a colourless, tasteless and odourless gas, it is also called nitric oxide. It is produced mainly during high temperature combustion processes together with nitrogen dioxide, of which it is also the precursor.

Nitrogen dioxide -NO2

Nitrogen dioxide is a toxic gas with a red-yellow colour, strong and pungent smell and is a strong irritatant. Additionally it is also highly corrosive.

The main sources of nitrogen oxides emissions comes from vehicle traffic and other civil and industrial heating plants, power stations and a wide range of industrial processes. Nitrogen dioxide is a widespread pollutant with adverse effects on human health and, together with nitrogen monoxide, contributes to a photochemical smog phenomenon, and acid rain.

Airlite removes nitrogen dioxide via oxidation and transforms the pollutant into harmless water-soluble nitrates and nitrites, which are temporarily deposited on the surface. Being water-soluble, they are removed by rainwater in outdoor applications and reduced by the humidity in the air in indoor applications.

As the tables show, Airlite reduces this pollutant by more than 80% in a laboratory environment and more than 50% in an high pollution outdoor environment (heavily used road tunnel).

Airlite was featured on the CNN TV, where the product was painted on the ‘Umberto I tunnel’ in Rome to much acclaim in 2007. The results are amazing.

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 738719