Pick out the wrong statement.
A. Iso-paraffin crack faster than n-paraf-fin
B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic
C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking
D. None of these
Answer: Option C
Solution (By Examveda Team)
The rate of decomposition of olefins in catalytic cracking is actually faster than in thermal cracking. This is because catalytic cracking provides a more efficient pathway with lower activation energy compared to thermal cracking. Catalysts accelerate the cracking process, leading to a higher rate of reaction for olefins.Option A is incorrect because n-paraffins generally crack faster than iso-paraffins due to less stable intermediates.
Option B is correct as stated; catalytic cracking is indeed endothermic, requiring heat input, whereas the regeneration of the catalyst is exothermic, releasing heat.
Option D cannot be the answer since one of the previous statements is incorrect.
This Question Belongs to Chemical Engineering >> Petroleum Refinery Engineering
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Related Questions on Petroleum Refinery Engineering
Aniline point test of an oil qualitatively indicates the __________ content of an oil.
A. Paraffin
B. Olefin
C. Aromatic
D. Naphthene
C. In catalytic cracking olefins crack 1000-10000 times faster than thermal process.
With reference to the book " Elements of petroleum refinery engineering" by OP Gupta. Chapter "Thermal and catalytic cracking".
Catalytic cracking is an endothermic process but hydrocracking is an exothermic process.
So its definately not (B)