Chemical Engineering - Petroleum Refinery Engineering - Discussion

1) Iso paraffin easily cracked as compared to normal paraffin.

2) In FCCU for cracking molecules, we have to supply energy (endothermic) , in regeneration by the combustion of coke deposited on catalyst the heat is liberated (exothermic).

3) To NHT & DHDS, FCCU stream is feed for both as cracked Naptha & cracked diesel which contains high olefin content. Here if we carefully observe then we can found that the olefins are first cracked and then saturated easily in the presence of catalyst but with only thermal energy it is very difficult for the same cracking as compared to catalyst so that,

The statement "C" is the answer.

Thank you.

Right, Agree @Nipu Kalita.

@Shanker Tanneeru.

Please read the question carefully, option (c) is wrong because olefins cracks 1000 to 10000 time in catalytic cracking than thermal cracking.

I think A is the correct answer.

Agree, D option is correct.

I also agree, it should be option D.

Option (c) is wrong because olefins crack 1000 to 10000 times in catalytic cracking than thermal cracking.

So the answer should be (C).