Determination of Nitrogen Monoxide (NO) Emission

Nitrogen oxides (NOx) are a very interesting and important group of chemical compounds that pollute the air. Nitrogen oxides represent a family of seven compounds. Nitrogen dioxide (NO2) is the most common form of nitrogen oxides in the atmosphere produced by human activities. Nitrogen dioxide is not only an important air pollutant on its own, but also reacts in the atmosphere to form ozone and acid rain. Most people today are exposed to unhealthy ozone levels in the air. Nitrogen dioxide reacts in the presence of air and ultraviolet light in sunlight to form ozone and nitrogen monoxide (NO). Nitrogen monoxide then reacts with free radicals in the atmosphere. Free radicals are created by UV rays that act on volatile organic compounds (VOC). Free radicals then convert nitrogen monoxide into nitrogen dioxide. In this way, each nitrogen monoxide molecule produces ozone multiple times. Nitrogen monoxide and nitrogen dioxide are the most abundant nitrogen oxides in air.

Nitrogen oxide emissions from combustion are mainly in the form of nitrogen monoxide. Nitrogen monoxide is produced up to the limit of available oxygen in the air (approximately 1300 thousand ppm) at temperatures above 200 degrees Celsius. At temperatures below 760 degrees, nitrogen monoxide is produced in much lower concentrations or not at all.

Apart from nitrogen dioxide from the soil, lightning and natural fires, nitrogen monoxide is largely anthropogenic, meaning it is produced by human activities. Biogenic sources are generally thought to account for less than 10 percent of total nitrogen oxide emissions.

Trends in anthropogenic nitrous oxide emissions have long been monitored. Nitrous oxide emissions are tracked across energy production and distribution, industrial energy use, industrial processes, road transport, non-road transport, solvent and product use, agriculture, and waste. In these studies, nitrous oxide and nitrous dioxide are collectively referred to as nitrous oxides. The combustion of fossil fuels is by far the dominant source of nitrous oxide emissions. Emissions depend not only on the amount of nitrogen in the fuel but also on the air-fuel mixture ratio. High temperatures and oxidation-rich conditions generally promote the formation of nitrous oxides during combustion.

Our organization also provides nitrogen monoxide emission determination services with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.