L.O.I can compare and evaluate methods for the production of ethanol.

Tuesday, September 24, 2013

Two processes for making ethanol.

1. Fermentation with yeast.

2. Hydration of ethene.

1. Fermentation with yeast.

Sugar (glucose) Ethanol + CO2

yeast

C6H12O6 2C2H5OH + 2CO2

2. Hydration of ethene.

ethene + steam ethanolcatalyst

C2H4 + H2O C2H5OH

Hmm. I like the fermentation of

sugars to produce ethanol.

But then I like the idea of hydration of

ethene too.

But which is better?

There’s only one way to find out…

EVALUATE!

Compare and Contrast

Fermentation HydrationRenewable resource Non-renewable

Batch process Continuous

Slow Fast

Impure product Pure product

Catalyst? Catalyst

Ethanol can be made by two processes, ethene reacting with ……………… under pressure in the presence of a ………………., or the fermentation

of …………… using enzymes in ………………Wordbank: catalyst, sugar, yeast, steam

How can people claim that the fermentation of plant materials does not contribute to the

increase in carbon dioxide in the air?

Why is a continuous process better than a batch process for making a product in

industry?

L.O.I can compare and evaluate methods for the production of ethanol.

Tuesday, September 24, 2013

Chemistry drop-in clinic lunchtime Thurs 605

What might our lives be like if yeast produced methanol

rather than ethanol?