Oil from Algae?

Engineers have sped up a naturally occurring process to make crude oil from algae from about a million years to just minutes.

Researchers at the Department of Energy’s Pacific Northwest National Laboratory pumped a slurry of wet algae into a chemical reactor, which then subjects the biological material to very hot water under high pressure to tear it apart and convert it into liquid and gas fuels.

The resulting crude oil can then be conventionally refined into aviation fuel, gasoline or diesel fuel, the researchers reported in the journal Algal Research.

The team’s experiments converted more than 50 percent of the algae’s carbon into crude oil, sometimes up to 70 percent, in about one hour and created nothing more hazardous than an odor of dirty socks, rotten eggs and wood smoke from the processed biological material.

In fact, the leftover water and nutrients such as nitrogen, phosphorus and potassium can be recycled to grow more algae.

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The system runs at more than 660 degrees Fahrenheit at about 3,000 pounds per square inch, combining processes known as hydrothermal liquefaction and catalytic hydrothermal gasification.

The system isn’t easy or cheap to build, but Elliott said cost savings later in the process justified the investment.

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