Process modifications include using specially designed low-NOx burners, reburning, combustion staging, gas recirculation, reduced air preheat and firing rates, water or steam injection, and low excess air (LEA) firing. These modifications are capable of reducing NOx emissions by 50 to 80%.
Is nitrogen an industrial pollutant?
Nitrogen Oxides are a family of poisonous, highly reactive gases. NOx pollution is emitted by automobiles, trucks and various non-road vehicles (e.g., construction equipment, boats, etc.) as well as industrial sources such as power plants, industrial boilers, cement kilns, and turbines.
How is nitrogen dioxide pollutant formed?
Nitrogen dioxide, or NO2, is a gaseous air pollutant composed of nitrogen and oxygen and is one of a group of related gases called nitrogen oxides, or NOx. NO2 forms when fossil fuels such as coal, oil, gas or diesel are burned at high temperatures.
What can we do to reduce the production of nitrogen dioxide in industry?
Manufacturers can use pollution prevention methods such as low NOx burners, steam/water injection, catalytic combustion, and lean burn; or add-on control technologies such as selective catalytic reduction, non-selective catalytic reduction, and non-thermal plasma reactors.
What causes VOC?
Other sources of VOCs include the burning of fuels such as gas, wood and kerosene and tobacco products. VOCs can also come from personal care products such as perfume and hair spray, cleaning agents, dry cleaning fluid, paints, lacquers, varnishes, hobby supplies and from copying and printing machines.
How do I control NOx in my boiler?
By injecting water or steam into the flame, flame temperatures are reduced, thereby lowering thermal NOx formation and overall NOx levels. Water or steam injection can reduce NOx up to 80% (when firing natural gas) and can result in lower reductions when firing oils.
What is nitrogen dioxide made of?
Nitric oxide (NO) and nitrogen dioxide (NO2) are two gases whose molecules are made of nitrogen and oxygen atoms.
What produces nitrogen dioxide?
NO2 primarily gets in the air from the burning of fuel. NO2 forms from emissions from cars, trucks and buses, power plants, and off-road equipment.
What is the chemical formula of nitrogen dioxide?
NO₂
Nitrogen dioxide/Formula
What is NOx and SOx?
The two main pollutants from the ship’s emission are Nitrogen oxides (NOx) and Sulphur oxides (SOx). These gases have adverse effects on the ozone layer in the troposphere area of the earth’s atmosphere which results in the green house effect and global warming.
What are components of smog?
Smog, formed mainly above urban centres, is composed mainly of tropospheric ozone (O3); primary particulate matter such as pollen and dust; and secondary particulate matter such as sulphur oxides, volatile organic compounds, nitrogen oxides (NOx) and ammonia gas.
