Petroleum Refinery Engineering
Research octane number refers to the

Low octane number motor fuels
Unleaded motor fuels
High octane number aviation fuels
High octane number motor fuels

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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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Petroleum Refinery Engineering
Asphalts are

. Low molecular weight & low boiling point compounds present in petroleum
Desirable in catalytic cracking feedstock, because they produce coke
Readily oxidisable and form carbonaceous sludge
All of these

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