Efficient conversion

A catalyst developed by researchers at Ohio State University can help convert ethanol into hydrogen with a 90 per cent yield.

Umit Ozkan, professor of chemical and biomolecular engineering at Ohio State University, said the catalyst is also inexpensive, because it does not contain precious metals, such as platinum or rhodium.

Ozkan said: 'Rhodium is used most often for this kind of catalyst, and it costs around $9,000 (£4,800) an ounce. Our catalyst costs around $9 (£4.80) a kilogram.'

The ethanol into hydrogen conversion process starts with a liquid biofuel such as ethanol, which is heated and pumped into a reactor, where the catalyst spurs a series of chemical reactions that ultimately convert the liquid to a hydrogen-rich gas.

The catalyst is made from tiny granules of cerium oxide - a common ingredient in ceramics - and calcium, covered with even smaller particles of cobalt. It produces hydrogen with 90 per cent efficiency at 660F (around 350C) - a low temperature by industrial standards.