How Oil Refineries Work
Nobody can put crude oil in a car. Between the oil well and the fuel pump stands the refinery, and when fuel prices climb, as they did in 2026, refining is part of the story. This film explains the chemistry: why crude is a mixture of hydrocarbon molecules of every length, how a distillation tower sorts them by boiling point, how cracking breaks big molecules into petrol, how reforming raises octane, and how hydrogen strips out sulfur. Heat the crude yourself, crack a molecule and compare a barrel before and after cracking.
From black crude to clear fuel
The factory between the oil well and the fuel pump.
A soup of molecules
Crude oil is not one substance but hundreds.
Light for a hospital
Refining began with lamps, not cars.
Longer chains, higher boiling points
The single idea a refinery is built on.
Hot at the bottom, cool at the top
A tower that sorts molecules by size.
Cuts
Gas at the top, asphalt at the bottom.
A second tower
Lower the pressure, and heavy oil boils.
The wrong mix
Crude gives what nature put in it, not what drivers want.
Cracking
Heat a long molecule enough and it snaps.
A powder that flows like a liquid
The catalyst that fuelled a war and a century of driving.
Shape matters
Same atoms, very different fuel.
Reshaping molecules
Not breaking them: rearranging and joining.
Cleaning with hydrogen
Why modern diesel smells less and pollutes less.
42 gallons in, 45 out
What one barrel of crude becomes.
One connected machine
Every unit feeds the next.
From black crude to clear fuel
One idea about boiling, and a century of chemistry.
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