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Biofuels - Coggle Diagram
Biofuels
1. What is it?
any source of energy from biomass/living organisms
sources
plants
animal manure
vegetable oils
algae
cooking grease
benefits
renewable
carbon-neutral
burn cleaner & less carbon
2. The types
ethanol
derived from corn & sugar cane
the most common type
fermentation
process
tiny microbes - absorb starches & sugar
produce alcohol
purified
mixed with gasoline
blends
E10
10% ethanol + 90% gas
3. Some drawbacks
ethanol
not efficient as gasoline
fill up more often
require fossile energy in harvesting crops
not environmentally friendly
lead to food shortages & price hikes
convert wilderness areas into farmland
bad for the environment
biodiesel
less energy to manufacture
from vegetable oils
from animal fats
waste grease
can be used in anything
less greenhouse gas
problems
requires a lot of farmland
turns solid at low temperatures
4. Possible soultions
a new generation of biofuels
cellulosic ethanol
based on cellulose
from parts of crops - X eaten
X require a lot of farmland
algae
found in all the waterways
produce more fuel
grow faster