New technology that combines production of electricity with capture of carbon dioxide could make billions of barrels of oil shale - now regarded as off-limits because of the huge amounts of carbon dioxide released in its production - available as an energy source.

That's the topic of the latest episode in the American Chemical Society's (ACS) award-winning "Global Challenges/Chemistry Solutions" podcast series.

Adam Brandt, Ph.D., notes in the podcast that almost 3 trillion barrels of oil are trapped in the world's deposits of oil-shale, a dark-colored rock laden with petroleum-like material. Brandt and colleague Hiren Mulchandani are at Stanford University.

The United States has by far the world's largest deposits in the Green River Formation, which covers parts of Colorado, Utah and Wyoming.

The domestic oil shale resource could provide 1.2 trillion to 1.8 trillion barrels. But concerns over the large amounts of greenhouse gases - mainly carbon dioxide - released by current methods prevent many companies from trying to extract oil from shale.

Brandt's answer is EPICC - a self-fueled method that generates electricity, as well as the heat needed to produce that electricity from shale.

The report, which appears in ACS' journal Energy and Fuels, describes how EPICC could generate large amounts of electricity without releasing into the atmosphere carbon dioxide from burning the shale. That carbon would be captured and stored underground as part of the production process.