ALKENES
Unsaturated Hydrocarbon
- Compounds which have carbon-carbon double bond
- Compounds made up of carbon and hydrogen only
GENERAL FORMAULE CnH2n
Useful to make polymers, alkanes, alcohols
Alkanes (1)
Edexcel IGCSE Chemistry Alkenes
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Edexcel IGCSE Chemistry Alkenes
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MANUFACTURE OF ETHANOL
| FERMENTATION | HYDRATION OF ETHENE | |
| REACTION | Glucose Ethanol + carbon dioxide C6H12O6 2C2H5OH + 2CO2 | Ethene + Steam Ethanol |
| REACTION CONDITIONS | Gentle temperature and pressure. Anaerobic conditions | Nickel catalyst and high temperature and pressure |
| ADVANTAGES | Uses renewable resources like sugarcane. Less dependent on fossil fuels and due to less energy requirements do not harm the environment. | It is a continuous process. It is rapid more efficient and have 100% atom economy. Produces more pure ethanol |
| DISADVANTAGES | It is a batch process. The ethanol has to be distilled from time to time as high concentration will kill the yeast. The reaction is slow and produces impure ethanol. Also the atom economy is not 100% | Requires ethene which is dependent on crude oil. Uses non renewable resources. |
REACTIONS OF ALKENES
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References:
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