Biofuel advances

The aerospace industry remains committed to getting off the ground with alternatives to jet fuel.

As nations grapple with emissions, oil-security, and energy-price matters, aggressive investment, regulation, and corporate involvement have propelled the alternative-fuels industry to commercial relevance. Alternative fuels today have a total capacity capable of replacing 4.8% of current oil capacity.

However, growth has slowed significantly. Since 2005, annual capacity growth has been roughly 22%; but growth through 2015 will be about 5% per year. As supply grows and logistical hurdles associated with feedstock and fuels increase, a new crop of technologies is emerging to add to the growing alternative-fuels space.