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

on a large scale in only a few places worldwide. One of the biggest obstacles to industrial-scale implementation is its parasitic energy cost. Today's carbon capture materials, such as liquid amine scrubbers, sap a whopping 30 percent of the power generated by a power plant.

To overcome this, scientists are seeking alternatives that can be used again and again with minimal energy costs. It's a slow, finicky process. Promising materials such as metal-organic frameworks come in millions of variations, only a handful of which are conducive to capturing carbon. Finding just the right material may take years.

That could change. In early May, Long's team began negotiating a three-year, $3.6 million grant from the Department of Energy's Advanced Research Projects Agency-Energy (ARPA-E) to supercharge the search.

"We want to run the discovery process very rapidly and find materials that only consume 10 percent of a power plant's energy," says Long, who's working with fellow Berkeley Lab scientists Maciej Haranczyk, Eric Masanet, Jeffrey Reimer, and Berend Smit on the project. Together, they'll create a state-of-the-art production line.

A robot will automatically synthesize hundreds of metal-organic frameworks and X-ray diffraction will offer a first-pass evaluation in the search for pure new materials. Magnetic resonance spectroscopy will then ferret out the materials with the pore size distribution best suited for carbon capture.

Next comes the big test: can it capture carbon dioxide from a flue gas? High-throughout gas sorption analysis conducted using new instrumentation built by Wildcat Discovery Technologies of San Diego, California will provide the answer.

Computer algorithms will constantly churn through the resulting data and help refine the next round of synthesis. Promising materials will also be assessed to determine if any ingredients are too expensive for large-scale commercialization.

"We don't wan
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Contact: Dan Krotz
dakrotz@lbl.gov
510-486-4019
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert

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