Biofuels

Question 1

biofuels

Answer 1

fuels derived from recently dead organic material, mainly plant material

Question 2

how are biofuels produced

Answer 2

crop absorbs CO2 via photosynthesis, crops harvested for biomass, biomass coverted into biofuel via fermentation, liquid biofuel used for transportaton

Question 3

how is bioetthanol produced

Answer 3

yeast is used to facilitate anaerobic fermentation of sugars, ethanol is produced and diffuses out of the cell, ethanol is then distilled and converted into a usuable form, bioethanol is usually mixed with other fuels to increase octane levels and improve exhuast emissions

Question 4

two main types of biofuels that that are produced from biomass

Answer 4

bioethanol and biodesel

Question 5

how does bioethanol and biodiesel differ

Answer 5

bioethanol is produced from fermenting sugars, biodiesel produced from the formatation of fatty acids from natural oils

Question 6

strengths of biofuels

Answer 6

climate impact,, enrgy security and localised energy -biomass dourced/farmed around the world

Question 7

weaknesses of biofuels

Answer 7

food vs fuel, cost and difficulty of uptake, second order environmental impacts