An oil refinery is a huge industrial factory with tall metal towers, tanks, and thousands of pipes. When dark crude oil arrives from underground wells, it is not ready for cars or machines. The refinery has one main mission: to separate the crude oil into clean, useful liquids. It does this using a process called distillation.
Inside the refinery, a large furnace heats the crude oil until it turns into hot vapor. This vapor enters a very tall cylinder called a distillation column. The column is hot at the bottom and cooler at the top. As the gas rises through the column, different parts cool down and turn back into liquid at different temperatures.
Light products, such as cooking gas and gasoline, rise to the cool top of the tower. Medium products, like jet fuel and diesel, collect in the middle section. The heaviest parts stay at the hot bottom. These heavy liquids become ship fuel and thick black asphalt used to pave smooth roads. Hundreds of engineers, technicians, and operators monitor the equipment day and night to keep every refinery running safely and smoothly.
