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In which process does the oil vapours are heated to their cracking temperatures?

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in Engineering Chemistry II by (789k points)
In which process does the oil vapours are heated to their cracking temperatures?

(a) Thermal cracking

(b) Fixed-bed cracking

(c) Fluid-bed cracking

(d) Coking

This question was addressed to me by my college professor while I was bunking the class.

Asked question is from Cracking topic in portion Fuels and Combustion of Engineering Chemistry II

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The correct answer is (b) Fixed-bed cracking

Explanation: In fixed-bed cracking the oil vapours are heated to their cracking temperatures and are passed on to the fixed catalyst bed. When the catalyst gets carbonised, it is reactivated by burning off the carbon deposited.

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