Emission:
Whenever, any fuel is burnt, we receive energy as main product and many other products. In general we will call them as”Emissions”. So, Emission is product of combustion of fuels which may contain, smoke, carbon monoxide, sulphur compounds, particulates, nitrogen compounds (popularly known as NOX) fumes etc.
Need For Emission Control:
In 20th century, growing technology have handed us with great machines and gadgets. One of them is Internal Combustion Engine (I.C. Engine). Growing technology demanded for more use of energy which we extracted from burning of fuels. This have lead us to the most horrible problem today “Air Pollution”. Air pollution is simply the presence of undesirable gases in undesirable quantities in the air. This have lead to more serious phenomenon of Global Warming. These are just main problems but there are so many local problems which may differ place to place.
Main source of emission is fuel burnt in the I.C. Engine (about 42% of overall emissions).
Emission Details:
1. Emissions from Spark Ignition Engine:
Major emission from S.I. Engine are listed below.
- Carbon Monoxide (CO).
- Hydrocarbons (HC).
- Oxides of Nitrogen (NOX).
2. Emissions from Compression Ignition Engine:
Major emissions from C.I. Engine are listed below.
- Carbon Monoxide (CO).
- Unburnt Hydrocarbons (HC).
- Oxides of Nitrogen (NOX).
- Sulphur Di Oxide.
- Invisible Emissions.
- Metallic Particulates.
- Visible Emissions.
- Smoke.
So, from these lists we can say that diesel engines are more harmful to environment than that of petrol one.
This is the brief information of emission sources and emissions. We will see in detail about emission control in next article.
