Acetone plus light creates a green jet fuel additive

"This process allows us to transform a natural product into a fuel additive, improving the performance of petroleum-based jet fuel," said Courtney Ford Ryan, a postdoctoral fellow at Los Alamos National Laboratory and lead author of a paper out in preprint form in the journal Sustainable Energy and Fuels.

"We converted bio-derived acetone to isophorone and then used a UV lamp to convert it to a cyclobutane, a type of hydrocarbon with high energy density for fuels applications," Ryan said.

There are many challenges in using acetone for fuels applications, the paper's authors note. Its volatility precludes its direct use as a fuel, and it requires chemical upgrading to be suitable for introduction into the fuel supply, as acetone has a nasty habit of dissolving engine parts and O-rings. So by upgrading the initial product to a cyclobutane, a potentially safer and more energy-dense fuel is created, while reducing the hydrogen input required for upgrading a bio-derived feedstock.

"Reducing high-pressure hydrogen treatment in synthesizing renewable fuels is important, because most hydrogen is derived from using steam to reform natural gas, which generates carbon dioxide," she said. Next, more work is needed to make a catalyst that could do it using sunlight, Ryan noted.