Carbon Dioxide Capture
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Removal of CO2 from the flue exhaust of power plants, currently a major source of emissions, is commonly accomplished by chilling and pressurizing the exhaust or by passing the fumes through a fluidized bed of aqueous amine solution, both of which are costly and inefficient. Other methods based on chemisorption of CO2 on oxide surfaces or adsorption within porous silicates, carbons, and membranes have been pursued as means for CO2 uptake. However, in order for an effective adsorption medium to have long-term viability in CO2 removal it should combine two features: (i) a periodic structure for which CO2 uptake and release is fully reversible, and (ii) a flexibility with which chemical functionalization and molecular level fine-tuning can be achieved for optimized uptake capacities. MOFs represent a class of porous materials that offer these advantages for CO2 storage: ordered structures, high thermal stability, adjustable chemical functionality, extra-high porosity, and the availability of hundreds of crystalline, well-characterized porous structures yet to be tested. Accordingly, we embarked on a program to assess the viability of MOFs in CO2 storage.
Recent Leading Publications:
Metal-organic frameworks with exceptionally high capacity for storage of carbon
dioxide at room temperature, A. R. Millward, O. M. Yaghi, J. Am. Chem. Soc.,
2005, 127, 17998-17999.
Raman spectra of hydrogen and deuterium adsorbed on a metal-organic framework,
A. Centrone, D. Y. Siberio-Pérez, A. R. Millward, O. M. Yaghi, A. J.
Matzger, G. Zerbi, Chem. Phys. Lett., 2005, 411, 516.
Design, synthesis, structure, and gas (N2, Ar, CO2, CH4 and H2) sorption properties
of porous metal-organic tetrahedral and heterocuboidal polyhedra, A. Sudik,
N. Ockwig, A. Millward, A. P. Côté, O. M. Yaghi, J. Am. Chem. Soc., 2005, 127, 7110.
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