Researchers from the U.S. Department of Energy’s Pacific Northwest National Laboratory along with collaborators from Fluor Corp. and the Electric Power Research Institute describe properties of the solvent, known as EEMPA, that allow it to sidestep the energetically expensive demands incurred by traditional solvents.
“EEMPA has some promising qualities,” said chemical engineer Yuan Jiang, lead author of the study. “It can capture carbon dioxide without high water content, so it’s water-lean, and it’s much less viscous than other water-lean solvents.”
At a cost of $400–$500 million per unit, commercial technology can capture carbon at roughly $58.30 per metric ton of CO2, according to a DOE analysis. EEMPA, according to Jiang’s study, can absorb CO2 from power plant flue gas and later release it as pure CO2 for as little as $47.10 per metric ton, offering an additional technology option for power plant operators to capture their CO2.
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IMAGE: This animation depicts the two-stage flash configuration, one of several processes described in a new study detailing how EEMPA, a Pacific Northwest National Laboratory-developed solvent, can capture carbon from flue. view more
Credit: (Animation by Michael Perkins | Pacific Northwest National Laboratory)
RICHLAND, Wash. As part of a marathon research effort to lower the cost of carbon capture, chemists have now demonstrated a method to seize carbon dioxide (CO2) that reduces costs by 19 percent compared to current commercial technology. The new technology requires 17 percent less energy to accomplish the same task as its commercial counterparts, surpassing barriers that have kept other forms of carbon capture from widespread industrial use. And it can be easily applied in existing capture systems.