Crude Oil
- Created by: Freya Woolley
- Created on: 06-05-15 19:39
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- Crude oil
- What is it?
- Formed by the remains of animals and plants that had died and buried millions of years ago
- Hydrocarbon molecules only contain H + C atoms
- Thick, black, viscous liquid hat floats on water
- A large mixture of hydro-carbons
- Not chemically combined
- Alkanes
- CnH2n+2
- Shorter chain- very flammable, very volatile, low bp, low viscosity
- Longer chain- less flammable, less volatile, high bp, higher viscosity
- Saturated hydrocarbon
- C-C bonds are single covalent
- Fractional distillation
- Fractions contain groups of molecules with similar molecular masses
- Liquids are separated if they have different boiling points in a mixture
- Crude oil- heated in furnace, passed into the lower part of the column
- Hydrocarbon vapours rise & condense at different points
- Drawn off trays by pipes. all used for different things
- Hydrocarbon vapours rise & condense at different points
- Combustion
- In plenty of O- complete combustion
- Hydro-carb + O --> CO2 =H2O
- In insufficient O0 incomplete combustion
- Hydrocarb + O --> CO + H2O
- Carbon- monoxide binds to the Hb in the RBC instead of O
- Hydrocarb + O --> CO + H2O
- In plenty of O- complete combustion
- Pollution
- SO2 causes acid rain
- Remove sulfur before burning
- SO2 causes acid rain
- Alt fuels
- Biodiesel, Hydrogen, ethanol
- Renewable and cleaner
- Vegetable oils and extracted from plants
- Carbon neutal- absorb CO2 as they grow
- Needs large areas of farm land to grow
- What is it?
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