- Crude oil is made up of hydrocarbons and is a fossil fuel (like coal and natural gas)
- These are separated by fractional distillation: a tower is heated and the fractions with the lowest boiling points are collected at the top (where itʼs coolest) and the fractions with the highest boiling points are immediately tapped off at the bottom in liquid form
- Incomplete combustion (combustion when there is not enough oxygen) can lead to carbon monoxide being formed.
- Carbon monoxide is lethal as it bonds irreversibly with the haemoglobin which carry oxygen around the body, and so reduce your bodyʼs oxygen carrying capabilities
- In car engines, nitrogen is combusted to form nitrogen oxide
- Fractional distillation produces less short-chain molecules than required and more long-chain ones.
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