Feeds

US Navy aims to make jetfuel from seawater uranium

Vampire-lust tales will rot your brain

Intelligent flash storage arrays

Analysis Coverage of recent US Navy research into producing jet fuel from CO2 and hydrogen has been widely reported under headlines such as "making jet fuel from seawater". The coverage illustrates not only declining modern understanding of science and technology, but also the sad eclipse of proper science fiction by vampire-lust fantasies.

The stories arise from a paper presented at the weekend by Robert Dorner and colleagues at the Naval Research Laboratory. According to the Navy boffins:

The impact CO2 is having on the environment has been thoroughly documented over the last years. Many different technologies have been proposed to reduce its impact on global warming such as geological sequestration. However, an interesting and attractive alternative would be the recycling of the gas into energy-rich molecules.

Dorner and Co have been working on mixing CO2 and hydrogen to produce light hydrocarbons which could then be processed into jet fuel. As jet fuel is rich in energy, doing this uses a lot of energy - and even then, a lot of the CO2 and hydrogen actually turns to methane. Methane can actually be a useful fuel, but not as useful as jetfuel - and as a waste product it's far more damaging to the environment than carbon dioxide, being a hugely more powerful greenhouse gas.

But Dorner and his colleagues have managed to get the amount of methane produced down to 30 per cent or so, using special catalysts. The "sea water" bit comes from the fact that Dorner has also noted that there's a fair bit of CO2 in sea water, plus hydrogen too if you have even more energy to crack water molecules apart.

If you were interested in being green, and had a whole load of energy which you considered green and wanted to make liquid fuel with, you probably wouldn't bother harvesting your CO2 from the sea - you'd get it from coal power stations or other hydrocarbon-burning powerplant exhausts. Such ideas are already commonly touted among researchers.

Enormous amounts of cheap carbon-free power aren't normally to be had, however, which is why such ideas remain mainly notional.

They aren't quite as notional for the US Navy, however. That's because US Navy aircraft carriers have powerful nuclear reactors aboard, potentially able to supply large amounts of energy if the ship wasn't going at full speed and launching planes (the reactors power the catapults as well as the ship's props).

As a result the primary limiting factor on how long a US carrier can keep flying its planes is actually the amount of jet fuel it can carry. The reactor's uranium lasts for years.

Thus it would actually be useful if you could build a plant on a carrier which could scoop CO2 out of the water, crack hydrogen from it too, and combine these to top off the ship's jet-fuel tanks. The carrier would be able to keep dominating airspace without needing to break off and replenish its supplies so often.

That's how Dorner may have presented the ideas to his bosses at the navy lab, perhaps. But when speaking to people concerned primarily about the environment, it's generally seen as silly to start mentioning nuclear power.

But there aren't really any other options for processes like this. Making synthetic liquid hydrocarbon fuels always consumes a lot more energy than you could get by burning the fuel, so it's mostly witless to make them using fossil power. (The US military is interested in making jet fuel using coal, but this is merely because America has a lot of coal mines and potentially not enough oil wells. The Germans who developed such processes originally did so for similar reasons.)

Providing a secure and efficient Helpdesk

More from The Register

next story
GRAV WAVE DRAMA: 'Big Bang echo' may have been grit on the scanner – boffins
Exit Planet Dust on faster-than-light expansion of universe
SpaceX Dragon cargo truck flies 3D printer to ISS: Clawdown in 3, 2...
Craft berths at space station with supplies, experiments, toys
That glass of water you just drank? It was OLDER than the SUN
One MEELLION years older. Some of it anyway
NASA rover Curiosity drills HOLE in MARS 'GOLF COURSE'
Joins 'traffic light' and perfect stony sphere on the Red Planet
Big dinosaur wowed females with its ENORMOUS HOOTER
That's right, Doris, I've got biggest snout in the prehistoric world
Japanese volcano eruption reportedly leaves 31 people presumed dead
Hopes fade of finding survivors on Mount Ontake
Canberra drone team dances a samba in Outback Challenge
CSIRO's 'missing bushwalker' found and watered
prev story

Whitepapers

A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.