From what i have read, a turbine can run on almost any combustible liquid or gas at about 70% efficiency. There are some companies using microturbines to run generators to supplement power from the grid lowering their costs and pollution too. This is established technology, not pie-in-the-sky, but it may need to be scaled down in size. Why not go back to a serial hybrid which uses a micro-turbine to run a generator and from there to ultra capacitors or batteries and an electric motor for the drive? great benefits: high efficiency, no transmission, and flexible fuels, and if the caps are used no battery replacement.