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PETROLEUM REFINERY ENGINEERING

Petroleum Refinery Engineering
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

Coking
Gum formation
Discoloration
Thermal cracking

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Petroleum Refinery Engineering
Doctor's solution used for sweetening of petroleum products is

Sodium plumbite
Sodium thiosulphate
Sodium sulphite
Lead sulphate

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Petroleum Refinery Engineering
Phenols are added in gasoline to

Increase its pour point
Reduce its viscosity
Act as an antioxidant
Improve the octane number

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Petroleum Refinery Engineering
The octane number of aviation gasoline may be

>100
97
87
79

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Petroleum Refinery Engineering
__________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation.

Potassium
Calcium
Magnesium
Sodium

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