Petroleum Refinery Engineering
Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with

Ethane
Methane
Methyl alcohol
Ethyl alcohol

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Petroleum Refinery Engineering
Alkylation

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

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Petroleum Refinery Engineering
Mercaptans are

All of these
Undesirable in petrol, as they reduce its octane number
Low boiling sulphur compounds
Added in LPG cylinders to detect gas leakage by its smell

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Petroleum Refinery Engineering
The order of preference for feedstock to a catalytic reformer is

Virgin naphtha - coking naphtha - catalytic naphtha
Virgin naphtha - catalytic naphtha - coking naphtha
Catalytic naphtha - coking naphtha - virgin naphtha
Coking naphtha - virgin naphtha - catalytic naphtha

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