Concept:Cracking breaks down higher molecular weight hydrocarbons into lower molecular weight, highly useful fractions like gasoline. Different methods yield different qualities of products.
Solution:- Catalytic cracking uses lower temperatures and pressures in the presence of a catalyst (like silica-alumina).
- This specific method is known for producing gasoline with a higher degree of branching and aromaticity.
- Branched and aromatic hydrocarbons have a significantly higher octane number, making this method superior for producing better quality gasoline.
Why other options are incorrect:Thermal cracking yields a higher proportion of unbranched alkenes and is less efficient for high-octane gasoline. Steam cracking is primarily used to produce lower alkenes (ethene, propene) for the petrochemical industry.
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