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Fuel Properties and Characteristics: A Comprehensive Guide, Slides of Chemistry
A comprehensive overview of fuel properties and characteristics, covering key aspects such as calorific value, ignition temperature, knock rating, volatility, gum content, and sulfur content. It explains the importance of these properties in relation to fuel efficiency, engine performance, and environmental impact. The document also discusses the concept of knocking and its impact on engine performance.
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2021/2022
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Hello, ma'am,
classmates!GOOD
AFTERNOON
FUEL
S
I'm April Marie D. De Guzman
a. Natural or primary fuels:
solid:-Coal, Wood, Dung, Peat
Liquid:- crude oil
Gas:- Natural gas
b. Artificial or Secondary
Solid:Charcoal,Coke,bituminous,Antha
racite
Liquid:-Kerosene,Diesel,Petrol
Gas:-Bio gas,Natural gas,Water gas
Calorific Value:
•^
It is the quantity of heat produced by the combustion of a fuel. The primary purpose of the fuel is to convert the maximum of its chemical energy into heat energy and other forms of energy on combustion. The higher the calorific value of a fuel, the more ideal a fuel is considered.
The minimum temperature at which a
substance catches fire is known as its
ignition temperature. An ideal fuel
must have an easily achievable
ignition temperature.
Ignition Temperature:
One of the best qualities of fuel is that it
should be used with higher compression
ratio without knocking because high
compression ratio provides high engine
efficiency and lower fuel consumption.
Knock rating
The fuel should have high anti-knock value
to make use of the higher compression
ratios.
Volatility indicates the tendency of a fuel
to change from liquid to vapour form.
A high volatility is desirable from the point
of view of starting ability and good
distribution
volatility
All petroleum products oxidise in the presence of air. Gum is formed by the polymerization or oxidation reaction of certain unsaturated hydrocarbons. A good fuel should have the minimum gum content. GUM CONTEN T
All hydrocarbon's contain free sulphur and Hydrogen sulphide. The presence of sulphur in the fuel is highly undesirable because of the formation of sulphur dioxide in presence of water vapour will have corrosive action on engine parts A high sulphur content is obviously undesirable. SULPHUR CONTENT