Nitrogen oxides (NOx) includes nitric oxide (NO) and nitrogen dioxide (NO2). It’s a family of poisonous, highly reactive gases. They form when fuel is burned at high temperatures.
Nitric oxide (NO):
Nitrogen dioxide (NO2):
It plays a major role in atmospheric reactions with volatile organic compounds (VOC). VOCs are another by-product from burning fossil fuels. Sunlight causes a chemical reaction between VOCs and NOx, which leads to ozone formation. Ground-level ozone is the main ingredient of smog. You’ll often see it present itself on hot summer days.
The MCP Directive has a NOx limit of 190mg/Nm3@15%O2 for all combustion plant/generators in the 1-50MWth range.
The non-road mobile machinery regulations impose a limit of 10.4g/kWh of NOx.
Are you unsure if the MCP Directive affects you? You can find out here.
IPU’s SCR systems can reduce these emissions by 99.8%.