Underground oil fires liberate carbon-free fuel - Science Magazine

Summary

This month, on the frozen plains of Saskatchewan in Canada, workers began to inject steam and air into the Superb field, a layer of sand 700 meters down that holds 200 million barrels of thick, viscous oil. Their goal was not to pump out the oil, but to set it on fire—spurring underground chemical reactions that churn out hydrogen gas, along with carbon dioxide (CO₂). Eventually, the company conducting the $3 million field test plans to plug its wells with membranes that would allow only the clean-burning hydrogen to reach the surface. The CO₂, and all of its power to warm the climate, would remain sequestered deep in the earth. Markets are growing for hydrogen as a fuel for power, heat, and transport, because burning it only releases water. But most hydrogen is made from natural gas, through a process that spews carbon into the air, or by electrolyzing water, which is pricey. Proton Technologies says it can cut costs by relying on oil reservoirs shunned by drillers because they are water-logged or because their oil is too thick.

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Underground oil fires liberate carbon-free fuel - Science Magazine
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