Joule Unlimited, formerly known as Joule Biotechnologies, is a producer of alternative energy technologies based in Bedford, Massachusetts. The company developed a process to generate hydrocarbon-based fuel by combining non-fresh water, nutrients, cyanobacteria, carbon dioxide, and sunlight. The company planned to break ground in October 2011 on a facility to produce more than 20,000 gallons of fuel per acre per year (19,000 m3/km2·a).
Helioculture uses photosynthetic organisms, but is otherwise distinct from the process that makes fuel from algae. Oils made from algae usually have to be refined into fuel following a batch process, but helioculture produces fuel directly - either ethanol or hydrocarbons - that do not need refining. The Helioculture process also does not produce biomass. This process is enabled by the discovery of unique genes coding for enzymatic mechanisms that enable the direct synthesis of both alkane, olefin, ethanol, and other key molecules. Helioculture allows for brackish water or graywater, nonindustrial waste water from sources such as baths and washing machines, to be used, while traditional biofuels such as cellulosic ethanol require fresh water.
Joule Unlimited claims that its product will be cost competitive with crude oil at $50 a barrel ($310/m3). The company also states that its product could supply all of the transportation fuel for the United States from an area the size of the Texas panhandle.
Joule Unlimited has not revealed the name of the organism that it uses, although it has acknowledged that the company has modified the organism. In September, 2010, Joule received a patent for genetically altered bacterium.
In addition to its founders, Joule's Board of Directors includes Graham Allison, Anatoly Chubais, Stelios Papadopoulos, Caroline Dorsa, and Ruben Vardanian. Joule's Scientific Advisory Board includes synthetic biologists George M. Church and Jim Collins.
After building a demonstration plant in New Mexico, Joule Unlimited entered into a strategic partnership with Audi in 2012 to accelerate the commercialization of their fuels, ethanol named Sunflow-E and diesel named Sunflow-D. Audi brands them as e-ethanol and e-diesel respectively.
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- TOTTY, MICHAEL (October 17, 2011). "A Faster Path to Biofuels". Wall Street Journal. Retrieved 11 December 2011.
- Portrait of a Transformative Technology: Joule Unlimited, Biofuels Digest, June 3, 2010
- U.S. company hopes to make fuel from sunlight, CO2, Reuters, July 27, 2009
- A Biofuel Process to Replace All Fossil Fuels, technologyreview.com, July 27, 2009
- Carbon dioxide, sun, and secret ingredient are firm’s fuel recipe, Boston Globe, July 27, 2009
- Biotech Company to Patent Fuel-Secreting Bacterium, New York Times, September 13, 2010
- "Joule and Audi partner on sustainable liquid transportation fuels". Green Car Congress. 17 September 2012. Retrieved 7 May 2015.
- "Audi e-diesel and e-ethanol". Audi. Retrieved 7 May 2015.
- Official Web page of Joule Biotechnologies
- Joule Biotechnologies Unveils Liquid Fuel From Solar Power, Wall St. Journal, July 27, 2009
- Joule Biotechnologies announce new biofuel jargon, scant details, Scientific American, July 27, 2009
- A Cagey Bet On Clean Tech, Forbes, July 27, 2009
- Patents assigned to Joule Unlimited
- Patent applications (Joule Unlimited personnel)
- WO 2010 062707 A1 ("Methods and compositions for producing carbon-based products of interest in micro-organisms", 2010-06-03)
- WO 2010 036951 A3R4 ("Methods and compositions for producing carbon-based products of interest in micro-organisms", 2010-06-24)
- WO 2010 068288 A3R4 ("Solar biofactory, photobioreactors, passive thermal regulation systems and methods for producing products", 2010-10-07)
- WO 2010 017245 A8R5 ("Methods and compositions for producing carbon-based products of interest in micro-organisms", 2010-10-14)
- Synpcc7942_1594 — acyl-ACP reductase (Synechococcus elongatus PCC 7942) (see US 7794969)
- "Microbial biosynthesis of alkanes", Schirmer A, Rude MA, Li X, Popova E, del Cardayre SB, Science 2010 Jul 30;329(5991):559-62.