2.7 Alcohols + Carboxylic acid Flashcards
1
Q
what is fermentation
A
process which converts sugars to ethanol
2
Q
what are the 2 stages of industrial preparation of ethanol
A
- hydration of ethene
- fermentation
3
Q
how is ethene obtained
A
by cracking hydrocarbons produced from petroleum
4
Q
how is ethene hydrated
A
ethene + steam = ethanol
5
Q
what are the temp and pressure conditions used for hydration of ethene
A
- 300°C
- 60-70 atmospheres
6
Q
what catalyst is used for the hydration of ethene
A
phosphoric acid (coated in an inert solid)
7
Q
what is a biofuel
A
a fuel that has been obtained using a biological source
8
Q
name the 2 main types of biofuel
A
- bioethanol
- biodiesel
9
Q
how is bioethanol obtained
A
fermentation (sugars in plants)
10
Q
how is biodiesel obtained
A
from oils + fats present in some plant seeds
11
Q
what are the advantages of biofuels
A
- renewable
- (overall) greenhouse gas production is reduced
- economic+political security
12
Q
what are the disadvantages of the use of biofuels
A
- large land use
- large use of resources
- fuel needed to run biofuel factories is large
13
Q
A
