Question

give an example of good fuels. how do you choose thar fuel? explain

Answer 1

green diesel is the good fuel. because it is a non polutant

Answer 2

fuel Fuel substance that reacts chemically with another substance to produce heat, or that produces heat by nuclear processes. The term "fuel", however, is generally used to describe those substances that burn readily in air or oxygen, emitting large quantities of heat. This reaction is known as combustion. Fuels are used for heating, power purposes, powering internal-combustion engines, and for a direct source of power in jet and rocket propulsion. A substance has to meet these criteria in order for it to be considered a fuel: (complete) There are a number of fuels that one can choose from, starting from petrol, diesel to methane gas and synthetic fuels.

Middle

This means that if ignition temperature of the fuel is too low, then the fuel is not suitable as it will catch fire easily. If the ignition temperature is too high, then again it is not suitable, as reaching the ignition temperature to soon will not be practical. Thus the ignition temperature of an ideal fuel should not be too high or too low. The environmental factors to consider are: the fuel should have low content of non combustible materials. Non combustible materials in a fuel are its impurities and when heated these impurities may cause pollution and give out undesirable harmful gases. Thus an ideal fuel should not pollute the air by emanating harmful gases. 

Conclusion

but these fuels can be very expensive. One example of this is high octane petrol. On this petrol, a car runs very efficiently. But the cost of this fuel is very high and is not readily available at petrol filling stations. High octane petrol is therefore not widely used. Thus an ideal fuel should be available easily and should also be cost effective. The fuel should also be easy to store and transport. Fuels are extracted and purified in factories and have to be transported to either homes for domestic use or to industries for industrial use. Quite a large number of precautions have to be taken to handle, store and transport fuels. These are highly flammable substances. For example it is easier to transport gaseous fuels like LPG or methane in cylinders than to transport petrol or kerosene in tankers. II. Non-renewable energy sources

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