Discussion
Match each conversion process with what it does.
List I
A. Catalytic cracking
B. Catalytic reforming
C. Alkylation
D. Isomerisation
List II
1. combines light olefins into branched gasoline
2. breaks heavy gas oil into lighter products
3. rearranges straight chains into branched ones
4. converts naphtha into high octane aromatics
Answer: A
Correct answer: A-2, B-4, C-1, D-3
Four conversion processes doing four different things. Catalytic cracking breaks heavy gas oil into lighter products. Reforming rearranges naphtha into high octane aromatics. Alkylation combines light olefins with isobutane into branched gasoline. And isomerisation converts straight chain paraffins into branched ones. The last three all raise octane; only the first is about size reduction.
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