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10000CH461122002

Explain the effect of various parameters like temperature, residence time and C/H
ratio on yields of important products from various feed stocks during Thermal
cracking operation.
Write the role of alkylation in a petroleum refinery. Explain the mechanism of
alkylation process. With a neat sketch, describe 1150, alkylation process.
With neat flow diagram, describe the Delayed Coking process. Give the operating
conditions and product yield.
Define reforming process. Explain catalytic reforming process and list all the
reactions involved in the catalytic reforming of naphtha.
PART C

Answer any two full questions, each carries 20 marks.

A process uses liquid sulphur dioxide as the solvent in the manufacture of

premium kerosine. Name the process. With a neat sketch, explain the process.
Describe sulphuric acid treatment process for sulphur removal with the reactions
involved.

List and explain the desirable properties and test methods of kerosene to be used
as a domestic fuel.

Describe any two sweetening processes used in petroleum refinery with relevant
figures.

Describe the properties, test methods and uses of jet fuel.

List and explain any four test methods that are used to evaluate the combustion
properties of petroleum products.

Explain the need of dewaxing process in a petroleum refinery. With a simplified
flow diagram, describe ketone dewaxing processes employed in petroleum
refinery.

Explain the process of selection of crude for bitumen manufacture. Describe the
different methods to test the quality of bitumen.

List and explain any three test methods that are used to evaluate the tendency of a

hydrocarbon to produce potentially explosive vapours.

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