Petroleum Refinery Engineering
Sulphur content in lighter and heavier petroleum products is generally determined respectively by

Bomb method and lamp method
Bomb method and quartz tube method
Lamp method and bomb method
Quartz tube method and lamp method

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

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

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