Petroleum Refinery Engineering
LPG when brought to atmospheric pressure & temperature will be a

Liquid lighter than water
Gas lighter than air
Gas heavier than air
Liquid heavier than water

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Petroleum Refinery Engineering
Polymerisation

Is aimed at producing lubricating oil
Causes olefins to combine with each other
Causes aromatics to combine with each other
Produces i-octane from cracked gases containing i-butane and butene

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