How is petroleum separated into car gas?

I was just wondering. I know that fractional distillation can be used for that, but that’s as far as I go. I also found out today that car gas has 10% of ethanol, or pure alcohol. Can you describe the process and what’s it’s called to transform (or separate) petroleum into car gas and other substances?

One Response to “How is petroleum separated into car gas?”

  1. Nevermore Says:

    Yeah, fractional distillation & catalytic cracking is used to seperate components of crude in a refinery & petrol or gasoline is used in cars.
    But before using it, some additives are blended in it like anti knocking agents, etc. Ethanol is also blended. It burns completely & so, less smoke is released. The main functions of ethanol are reducing C emission & more importantly, to reduce gas consumption (& so, our dependence on foreign oil).
    This process as I said is called blending & takes place as per guidelines set by energy dept. & takes place in a building attached to refinery, but seperate from the actual distillation column.