Biofuels that don't compete with food crops

The idea of biofuels from microbial sources has been around for a while, but if this company's claims hold up, it would be a huge breakthrough:

In September, a privately held and highly secretive U.S. biotech company named Joule Unlimited received a patent for “a proprietary organism” – a genetically adapted E. coli bacterium – that feeds solely on carbon dioxide and excretes liquid hydrocarbons: diesel fuel, jet fuel and gasoline. This breakthrough technology, the company says, will deliver renewable supplies of liquid fossil fuel almost anywhere on Earth, in essentially unlimited quantity and at an energy-cost equivalent of $30 (U.S.) a barrel of crude oil. It will deliver, the company says, “fossil fuels on demand.”

We’re not talking “biofuels” – not, at any rate, in the usual sense of the word. The Joule technology requires no “feedstock,” no corn, no wood, no garbage, no algae. Aside from hungry, gene-altered micro-organisms, it requires only carbon dioxide and sunshine to manufacture crude. And water: whether fresh, brackish or salt. With these “inputs,” it mimics photosynthesis, the process by which green leaves use solar energy to convert carbon dioxide into organic compounds. Indeed, the company describes its manufacture of fossil fuels as “artificial photosynthesis.”

Joule says it now has “a library” of fossil-fuel organisms at work in its Massachusetts labs, each engineered to produce a different fuel. It has “proven the process,” has produced ethanol (for example) at a rate equivalent to 10,000 U.S. gallons an acre a year. It anticipates that this yield could hit 25,000 gallons an acre a year when scaled for commercial production, equivalent to roughly 800 barrels of crude an acre a year.

By way of comparison, Cornell University’s David Pimentel, an authority on ethanol, says that one acre of corn produces less than half as much energy, equivalent to only 328 barrels. If a few hundred barrels of crude sounds modest, recall that millions of acres of prime U.S. farmland are now used to make corn ethanol.

From the Globe. I have to quibble with the claim that "we're not talking biofuels"; of course these are biofuels -- they're fuels from biological sources, after all. I kind of get what Reynolds means, though; they don't have the drawbacks that most biofuels we see today have. And I'm pretty sure you'd at least need some minerals to nourish the bacteria. Nonetheless, this could be great news.

Of course, as the article admits, the company is extremely secretive about their process. Naturally, this doesn't necessarily mean it's hokum; they may be trying to protect trade secrets as they claim. Time will tell whether this is the real deal, or just another bit of vapourware (by the way, has anyone heard any news of EEStor lately?)

Biofuel for aircraft

The gas turbine engine (be it turboshaft, turboprop, or jet) has a number of virtues, one of which is the ability to run on pretty much anything that burns. When Chrysler built a series of experimental gas turbine cars in 1963, diesel was the recommended fuel, but drivers experimented with numerous other fuels, including gasoline, kerosene, jet fuel, tequila, and reportedly Chanel No. 5 with success. For this reason, turbine engines are good candidates for biofuel substitution. And it's happening:

The Australian airline Qantas will this month announce a deal to build the world's second commercial-scale plant to produce green biojet fuel made from waste for its fleet of aircraft.

Its proposed partner, the US-based fuel producer Solena, is also in negotiations with easyJet, Ryanair and Aer Lingus about building a plant in Dublin, although this project is less advanced.

Airlines are trying to reduce their reliance on fossil fuels ahead of their entry into the EU's carbon emissions trading scheme in January 2012 and the introduction of other new environmental legislation. Under the scheme, any airline flying in or out of the EU must cut emissions or pay a penalty.

Solena's joint venture with Qantas – which could be announced within the next fortnight – follows a tie-up with British Airways, signed in February last year, to build the world's first commercial-scale biojet fuel plant in London, creating up to 1,200 jobs.

Once operational in 2014, the London plant, costing £200m to build, will convert up to 500,000 tonnes of waste a year into 16m gallons of green jet fuel, which BA said would be enough to power 2% of its aircraft at its main base at Heathrow. The waste will come from food scraps and other household material such as grass and tree cuttings, agricultural and industrial waste. It is thought the Qantas plant, to be built in Australia, will be similar.

From the Guardian. The fact that it's waste that they're using, as opposed to food crops, is a very good thing; however I wonder just how much fuel can be produced that way. I suspect that future generations will fly a lot less than we do. Or, they'll make it out of palm oil, which is actually even worse than petroleum in terms of its climate effect, owing to the amount of rainforest that is typically cleared to produce it.