Chemical Engineering - Petroleum Refinery Engineering - Discussion

20. 

Which of the following is desirable in diesel and kerosene but is undersirable in gasoline ?

[A]. Aromatics
[B]. Mercaptans
[C]. Paraffins
[D]. Naphthenic acid

Answer: Option C

Explanation:

No answer description available for this question.

Karguvelayyanar.R said: (Apr 25, 2013)  
1. Gasoline requires more octane number for good performance of engine. Hence octane number possess high aromatics. So aromatics is desirable in gasoline.

2. Diesel requires less auto ignition temperature. At the same way good kerosene requires high smoke point.

So both need high content of paraffins.

Manikannan said: (Nov 27, 2014)  
Gasoline needs aromatics but diesel needs paraffins.

Chu Van Phuc said: (Mar 15, 2015)  
Let's explain to me:

Why do you want to be undesirable Aromatics?

I think Aromatics has octane number high and gasoline need it. But Aromatics is not good for diesel because it will crease gum.

Venkatesh said: (Aug 7, 2016)  
Option C is correct.

Jaiveer Singh said: (Mar 24, 2017)  
Paraffins is right answer, because aromatic undesirable in diesel & kerosene.

Michael said: (Apr 9, 2017)  
Aromatics are quite undesirable in kerosene and diesel.

Rajesh said: (May 24, 2017)  
Option C is correct.

Aromatics has undesirable in kerosene and diesel.

Subash Sharma said: (Jan 13, 2018)  
No, the Answer should be paraffins.

Anshu said: (Jan 24, 2018)  
C is correct. I also agree.

Kaju said: (Jun 9, 2018)  
C is the correct answer.

Brijesh Pathak said: (Sep 12, 2018)  
Yes, Option C is correct. I also agree.

Mohanlokesh said: (Dec 8, 2018)  
Option C is the right answer.

Ravins Kumar said: (Jan 23, 2019)  
Paraffins is the right answer.

Datong John said: (Feb 20, 2019)  
C is the right answer because, Aromatics increases octane number for gasoline thereby required in Gasoline. Paraffins cause Knocking in Gasoline thereby, not required in Gasoline. Mercaptan and Naphthenic acids not required in Gasoline.

Trushal said: (May 1, 2020)  
SUMMARY:

Aromatics are quite undesirable in kerosene and diesel. Aromatics increases the octane number for gasoline thereby required in Gasoline. Aromatics is not good for diesel because it will create gum.

Paraffins cause Knocking-in Gasoline thereby, not required in Gasoline.

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