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5 Cards in this Set
- Front
- Back
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There are two methods for producing alcohols: |
1) Steam Hydration of Ethene. 2) Fermentation. |
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Steam Hydration of Ethene: 1) Conditions? 2) Catalyst? 3) Yield? 4) Purity? 5) Equation? |
1) 300ºC, 70 ATM. 2) H3PO4 Catalyst. 3) Overall around 95% yield. 4) Pure alcohol formed. 5) C2H4 + H2O --> C2H5OH. |
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Pro's con's for steam hydration of Ethene: |
Pro's: – Fast – Pure – Low Labour costs Con's: – Ethene is fro oil and is a finite resource (it'll run out) |
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Fermentation method: 1) Equation? 2) Conditions? – Reason for these conditions? 3) Yield? |
1) C6H12O6 --> 2C2H5OH + 2CO2. 2) 35ºC, anaerobic, using yeast to carry out the process. – Any lower temperature and the reaction would be too slow, any higher and the enzymes in the yeast would denature. – Anaerobically so the alcohol formed doesn't oxidise. 3) A low yield of about 15% - it's distilled using fractional distillation to increase the purity. |
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Pro's and Con's of fermentation: |
Pro's: – It's a biofuel - made from recently died matter. – It's Carbon neutral. – Glucose is a natural, infinite resource. Con's: – High labour costs. – Very slow. – Impure. |
