Thermal Cracking in Petroleum Refining Quiz

To increase the amount of light heating oil required

To convert heavy ends to gas and distillates

To reduce viscosity of the residue (correct)

To produce gasoline with higher octane rating

5–8%

10–25% (correct)

30–40%

50–60%

Presence of sulfur compounds

Long paraffinic side chains attached to aromatic rings (correct)

Excessive heat during refining process

High levels of nitrogen content

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