Question

Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm² is maintained during cracking mainly to

a.

increase the yield of light distillates.

b.

suppress coke formation.

c.

enhance the octane number of gasoline.

d.

reduce gum content in gasoline.

Answer: (b).suppress coke formation.

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Q. Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm² is maintained during cracking mainly to

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