Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
Power

US Navy Tries To Turn Seawater Into Jet Fuel 402

Hugh Pickens writes "New Scientist reports that, faced with global warming and potential oil shortages, the US Navy is experimenting with making jet fuel from seawater by processing seawater into unsaturated short-chain hydrocarbons that with further refining could be made into kerosene-based jet fuel. The process involves extracting carbon dioxide dissolved in the water and combining it with hydrogen — obtained by splitting water molecules using electricity — to make a hydrocarbon fuel, a variant of a chemical reaction called the Fischer-Tropsch process, which is used commercially to produce a gasoline-like hydrocarbon fuel from syngas, a mixture of carbon monoxide and hydrogen often derived from coal. The Navy team have been experimenting to find out how to steer the CO2-producing process away from producing unwanted methane by finding a different catalyst than the usual one based on cobalt. 'The idea of using CO2 as a carbon source is appealing,' says Philip Jessop, a chemist at Queen's University adding that to make a jet fuel that is properly 'green,' the energy-intensive electrolysis that produces the hydrogen will need to use a carbon-neutral energy source; and the complex multi-step process will always consume significantly more energy than the fuel it produces could yield. 'It's a lot more complicated than it at first looks.'"

Comment Re:Grrrrr (Score 1) 179

I used to use an app that did precisely this on my previous Windows smartphone. It didn't use GPS data but allowed locations to be defined based on tower codes and relative strengths.

The iPhone could have this as well if you could run background apps and access the network stack without jailbreaking.

Comment Re:another crippleware outrage (Score 1) 821

Audi and several other car makers do this to a lesser extent. If you want the "performance tuned" car computer software, you can go to a dealer and spend several hundred dollars to have them flip a switch.

You can enable a trial version of this performance tuning on your own that automatically disables after X miles.

Slashdot Top Deals

Work expands to fill the time available. -- Cyril Northcote Parkinson, "The Economist", 1955

Working...