Petroleum Refinery Engineering
Antioxidants are added in petrol to

Prevent the lead build up in engines
Prevent icing of the carburettor
Minimise the gum formation
Impart colour to it, for easy identification

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Petroleum Refinery Engineering
Alkylation

Causes olefins to combine with each other
Converts iso-paraffin into olefin
Converts olefin into paraffin
Causes olefins to combine with iso-paraffins

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