352110
Descrição
Mapa Mental por tom_gill99, atualizado more than 1 year ago
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Criado por tom_gill99
quase 13 anos atrás
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Production
ethanol:
fermentation vs.
ethene and steam
- Ethanol is the type of alcohol found in alcoholic
drinks such as wine and beer. It's also useful as a
fuel. For use in cars and other vehicles, it is usually
mixed with petrol.
- Ethanol molecules contain carbon,
hydrogen and oxygen atoms
- C2H5OH
- C2H5OH
- Ethanol can be made by reacting ethene (from
cracking crude oil fractions) with steam. A catalyst of
phosphoric acid is used to ensure a fast reaction.
- Ethene is made from crude oil, which is a non-renewable resource. It
cannot be replaced once it is used up and it will run out one day.
- This process needs conditions of 300 degrees and very
high pressure which uses a lot of energy,but produces 100%
pure alcohol
- This process needs conditions of 300 degrees and very
high pressure which uses a lot of energy,but produces 100%
pure alcohol
- Ethene is made from crude oil, which is a non-renewable resource. It
cannot be replaced once it is used up and it will run out one day.
- Another way ethanol can be
produced is fermentation
- Sugar from plant material is
converted into ethanol and carbon
dioxide by fermentation.
- The enzymes found in single-celled fungi (yeast) are the
natural catalysts that can make this process happen.
- C66H12O6 → 2C2H5OH + 2CO2
- C66H12O6 → 2C2H5OH + 2CO2
- Unlike ethene, sugar from plant
material is a renewable resource.
- The conditions needed for this reaction is only 30-40 degrees
meaning it doesn't need a lot of energy
- Alcohol is impure therefore has to be distilled further which
takes a lot of time
- Alcohol is impure therefore has to be distilled further which
takes a lot of time
- Sugar from plant material is
converted into ethanol and carbon
dioxide by fermentation.
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