Chemical Engineering - Petroleum Refinery Engineering - Discussion

Option B is also the right statement. Because, in FCCU The cracking reaction is endothermic and regeneration reaction exothermic.

Catalytic cracking is endothermic and regeneration reaction is exothermic.

Hi, I agree with @Veeramanigandan and @Mohamed Amer.

And you? Please help me to get a clear explanation. Thanks!

@Viettan:

1- The answer should be "C"; as olefins are produced in FCC and not decomposed (there is no olefins in the FCC feed).

2- Catalytic Cracking reaction is similar to thermal cracking reactions instead the use of a catalyst in FCC, so that's right that FCC is an endothermal reaction.

Catalyst regeneration is exothermal (it's widely known as a good advantage as it gives heat to the FCC gas oil and favorites the reaction).

Hope you find this helpful.

Option D is the right answer.

See the question its pick out the wrong statement?

So how the answer will be B? Explain.

A is the correct option.

The Correct and is (C). Because olefins crack 1000-10000 times faster in catalytic cracking than thermal.

Here option (B) is right answer. Because regeneration required high temp and combustion of catalyst, heat is supplied, so craking and regeneration both are endothermic reactions.

Both are endothermic reactions.