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The search for improved carbon sponges picks up speed
Date:5/27/2010

Jeffrey Long's lab will soon host a round-the-clock, robotically choreographed hunt for carbon-hungry materials.

The Lawrence Berkeley National Laboratory chemist leads a diverse team of scientists whose goal is to quickly discover materials that can efficiently strip carbon dioxide from a power plant's exhaust, before it leaves the smokestack and contributes to climate change.

They're betting on a recently discovered class of materials called metal-organic frameworks that boast a record-shattering internal surface area. A sugar cube-sized piece, if unfolded and flattened, would more than blanket a football field. The crystalline material can also be tweaked to absorb specific molecules.

The idea is to engineer this incredibly porous compound into a voracious sponge that gobbles up carbon dioxide.

And they're going for speed. The scientists hope to discover this dream material in a breakneck three years, maybe sooner. To do this, they'll create an automated system that simultaneously synthesizes hundreds of metal-organic frameworks, then screens the most promising candidates for further refinement.

"Our discovery process will be up to 100 times faster than current techniques," says Long. "We need to quickly find next-generation materials that capture and release carbon without requiring a lot of energy."

Carbon capture is the first step in carbon capture and storage, a climate change mitigation strategy that involves pumping compressed carbon dioxide captured from large stationary sources into underground rock formations that can store it for geological time scales. Many scientists believe the technology is key to curbing the amount of carbon dioxide that enters the atmosphere. Fossil fuels such as coal and natural gas will likely remain cheap and plentiful energy sources for decades to come even with the continued development of renewable energy sources.

Carbon capture and storage is being tested
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Contact: Dan Krotz
dakrotz@lbl.gov
510-486-4019
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert

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