Modification of Alkanes by Cracking (AQA A-Level Chemistry): Flashcards
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Definition of cracking
Definition of cracking
Breaking bonds in long-chain alkanes to form shorter alkanes and alkenes
Thermal cracking temperature range
Thermal cracking temperature range
700-1200 K
Main products of thermal cracking
Main products of thermal cracking
High percentage of alkenes
Catalytic cracking temperature
Catalytic cracking temperature
Around 720 K
Catalyst used in catalytic cracking
Catalyst used in catalytic cracking
Zeolite catalyst
Products of catalytic cracking
Products of catalytic cracking
Motor fuels (gasoline) and aromatic hydrocarbons
Why short-chain alkanes are better fuels
Why short-chain alkanes are better fuels
More volatile and burn more easily
Use of short-chain alkenes from cracking
Use of short-chain alkenes from cracking
Feedstock for producing polymers like plastics
Supply problem cracking solves
Supply problem cracking solves
Surplus of long-chain, shortage of short-chain hydrocarbons
Overall benefit of cracking to crude oil
Overall benefit of cracking to crude oil
Maximises utility and aligns supply with industrial demand