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A cost-effective and energy-efficient approach to carbon capture
http://www.eurekalert.org/pub_releases/2014-10/epfd-aca100714.php[font face=Serif]PUBLIC RELEASE DATE:
9-Oct-2014
Contact: Nik Papageorgiou
n.papageorgiou@epfl.ch
41-216-932-105
Ecole Polytechnique Fédérale de Lausanne
@EPFL_en
[font size=5]A cost-effective and energy-efficient approach to carbon capture[/font]
[font size=3]Carbon capture is a process by which waste carbon dioxide (CO2) released by factories and power plants is collected and stored away, in order to reduce global carbon emissions. There are two major ways of carbon capture today, one using powder-like solid materials which "stick" to CO2, and one using liquids that absorb it. Despite their potential environmental and energy benefits, current carbon capture strategies are prohibitive because of engineering demands, cost and overall energy-efficiency. Collaborating scientists from EPFL, UC Berkley and Beijing have combined carbon-capturing solids and liquids to develop a "slurry" that offers the best of both worlds: as a liquid it is relatively simple to implement on a large scale, while it maintains the lower costs and energy efficiency of a solid carbon-capturing material. The breakthrough method is published in Nature Communications.
…
Working with scientists from Beijing and UC Berkeley, Smit is a lead author on a breakthrough carbon-capture innovation that uses a mixture of solid and liquid in solution called a "slurry". The solid part of the slurry is a MOF called ZIF-8, which is suspended in a 2-methylimidazole glycol liquid mixture.
"Why a slurry?" says Smit. "Because in the materials that are currently used for adsorption the pores are too large and the surrounding liquid would fill them, and not let them capture CO2 molecules. So here we looked at a material – ZIF-8 – whose pores are too small for the glycol's molecules to fit, but big enough for capturing the CO2 molecules from flue gas."
…
Because it combines the low cost and efficiency of nano-porous materials with the ease of a liquid-based separation process, the slurry successfully addresses these two main obstacles to the implementation of carbon capture in the real world. In addition, it shows exceptionally good separation from CO2, meaning that it doesn't require excessive amounts of energy (e.g. boiling) in order to regenerate, which increases its overall energy efficiency.
…[/font][/font]
http://dx.doi.org/10.1038/ncomms61479-Oct-2014
Contact: Nik Papageorgiou
n.papageorgiou@epfl.ch
41-216-932-105
Ecole Polytechnique Fédérale de Lausanne
@EPFL_en
[font size=5]A cost-effective and energy-efficient approach to carbon capture[/font]
[font size=3]Carbon capture is a process by which waste carbon dioxide (CO2) released by factories and power plants is collected and stored away, in order to reduce global carbon emissions. There are two major ways of carbon capture today, one using powder-like solid materials which "stick" to CO2, and one using liquids that absorb it. Despite their potential environmental and energy benefits, current carbon capture strategies are prohibitive because of engineering demands, cost and overall energy-efficiency. Collaborating scientists from EPFL, UC Berkley and Beijing have combined carbon-capturing solids and liquids to develop a "slurry" that offers the best of both worlds: as a liquid it is relatively simple to implement on a large scale, while it maintains the lower costs and energy efficiency of a solid carbon-capturing material. The breakthrough method is published in Nature Communications.
…
Working with scientists from Beijing and UC Berkeley, Smit is a lead author on a breakthrough carbon-capture innovation that uses a mixture of solid and liquid in solution called a "slurry". The solid part of the slurry is a MOF called ZIF-8, which is suspended in a 2-methylimidazole glycol liquid mixture.
"Why a slurry?" says Smit. "Because in the materials that are currently used for adsorption the pores are too large and the surrounding liquid would fill them, and not let them capture CO2 molecules. So here we looked at a material – ZIF-8 – whose pores are too small for the glycol's molecules to fit, but big enough for capturing the CO2 molecules from flue gas."
…
Because it combines the low cost and efficiency of nano-porous materials with the ease of a liquid-based separation process, the slurry successfully addresses these two main obstacles to the implementation of carbon capture in the real world. In addition, it shows exceptionally good separation from CO2, meaning that it doesn't require excessive amounts of energy (e.g. boiling) in order to regenerate, which increases its overall energy efficiency.
…[/font][/font]
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