ECO PHYSICS’ NOX


-DETECTORS,


AN ESSENTIAL TOOL FOR STACK TESTERS IN SWEDEN


NOX


Emissions, Environmental Impact By NOX


oxygen atoms. NOX (NO2


) and less than 0.1% other nitrogenous trace gases. Nitrogen oxides (NOX


we defi ne a group of gaseous compounds, based on a singular nitrogen and singular or multiple consists of approximately 95% of Nitrogen oxide (NO), less than 5% Nitrogen dioxide ) are produced by the


interaction of nitrogen, oxygen and hydrocarbons for instance during various forms of combustion.


Therefore NOX 1. Thermal NOX


is separated into: (produced at very high temperatures, also


supported by high pressure) 2. Fossil or combustive NOX


3. Prompt NOX interacting with N2 (bound NOX on the quality of incineration)


(depending on the effect of hydrocarbon radicals, in the atmosphere)


Nitrogen oxides are strongly contributing to the greenhouse effect due to their absorbance and emittance of thermal and infrared radiation. The greenhouse effect consists of an equilibrium between the natural concentration of Nitrogen oxides in the atmosphere and solar radiation at 235 W/m2


. It maintains Earth’s


surface temperature at a present average of 15°C. Without this effect the temperature would be located around -18°C. This equilibrium is disturbed by Human contributions since the industrial revolution from 1750 (“Greenhouse Gases and Aerosols”, IPCC reports, R.T. Watson, H. Rodhe, H. Oeschger, U. Siegenthaler). In all major cities, 50 to 75% of all emissions emerge from combustion and fossil fuels.


The emission of Nitrogen oxides (NOX ) contributes to many environmental problems. Together with Sulphur dioxide (SO2 ),


Nitrogen oxides are the main cause of acidifi cation, which leads to widespread damage of fl ora and fauna on soil and in water habitats. Close to the ground, they participate in creating photochemical smog in summer, based on a day-night cycle presence of Ozone, where the concentration reaches its maximum in the afternoon and drops during night time.


in fossil fuels, depending


IET March / April 2017 www.envirotech-online.com


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