A petroleum refinery uses catalytic cracking to process a fraction of crude oil. Which conditions are used in catalytic cracking?

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Question

A petroleum refinery uses catalytic cracking to process a fraction of crude oil. Which conditions are used in catalytic cracking?

Accepted Answer

Moderate temperature with a zeolite catalyst — Award 1 mark for moderate temperature (approximately 500°C) with a zeolite (or silica/alumina) catalyst. A is incorrect — this describes thermal cracking conditions. C is incorrect — low temperature would not provide sufficient energy to break C–C bonds. D is incorrect — this partially describes steam cracking but omits the catalyst used in catalytic cracking.

Answer

Low temperature and atmospheric pressure with a platinum catalyst

Answer

High temperature and high pressure without a catalyst

Answer

Very high temperature with steam and no catalyst

Answer

Moderate temperature with a zeolite catalyst

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