we 1220 Aug 2012 10:32
well, hydrogen is an interesting fuel, no doubt about it. But of course you have to make it, which takes a lot of energy, and then storage is a major issue. No solid state material has yet been identified as an ideal hydrogen storage material. Storing liquid hydrogen also means freezing it, which takes a lot of energy to do and then maintain. Liquid hydrogen also has less energy by volume than petrol for instance, so a tank of 60 gallons of liquid hydrogen would be needed to hold the equivalent energy of a 15 gallon tank of petrol. Its also twenty times more explosive than petrol which makes it tricky to work with. Not saying these problems aren't impossible to overcome but we are a long way off providing a viable alternative to conventional fossil fuels. In the meantime we should try and find ways of using conventional fuels more efficiently - like CWR are attempting to do.