B6 Biofuels (1)

HideShow resource information
  • Created by: Qiao-Chu
  • Created on: 12-04-13 08:58

Biofuels could replace fossil fuels in the future.

Biomass is living or recently dead organic material. It has a store of energy. Energy can be transferred into more useful forms:

  • Fast growing trees (replaced quickly and easily) burnt to release heat
  • Biomass fermented by yeast and bacteria to create biogas (used as fuel)

Biogas about 70% methane (CH4) and 30% carbon dioxide (CO2). Also traces of hydrogen, nitrogen and hydrogen sulphide.

Biogas with more than 50% methane burns easily. Around 10% explosive.

Biogas made by anaerobic respiration of bacteria on waste material in a digester. Bacteria's respiration produces methane.

Biogas can be used as fuel, burned to power turbine, generate electricity. Useful for remote areas with no mains…

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »