Alternative Energies
New process provides renewable fuel

Renewable fuels from pyrolysis bio-oil has been created by researchers. Pyrolysis bio-oil is produced by rapidly heating the forest residues in an oxygen-free environment and then rapidly cooling the products formed. By co-gasification with black liquor, a renewable fuel is produced.

Low-cost wafers for solar cells

Silicon wafers are the heart of solar cells. However, manufacturing them is not cheap. Over 50 percent of the pure silicon used is machined into dust. A new manufacturing technique puts an end to these material losses, with raw material savings of 50 percent along with an 80 percent reduction in energy costs.

The double life of a bacteria: Living off both iron and pure electricity

The bacterium Acidithiobacillus ferrooxidans can take electrons needed for growth directly from an electrode power source when iron—its already known source of energy—is absent, new research shows. The study shows that A. ferrooxidans can use direct uptake of electrons from an electrode to fuel the same metabolic pathway that is activated by the oxidation of diffusible iron ions.