Petroleum Refinery Engineering
Alkylation

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

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Petroleum Refinery Engineering
Choose the correct statement regarding thermal cracking.

At low pressure, the yield of lighter hydrocarbons are more
Greater depth of cracking gives lower octane number gasoline
Increased residence time results in the decreased severity of cracking
Moderate changes in operating temperature does not change the depth of cracking

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