Physical Solvents that are Alternatives for PEGDME in CO{sub 2} Absorption
Advanced gasification power plants will employ the water-gas shift reaction producing a high pressure gas-phase mixture containing CO{sub 2}, H{sub 2} and water. This gas mixture at elevated pressures provides ample driving force in order to use a physical solvent that will selectively absorb, not chemically bind, to the CO{sub 2}. Potential physical absorbers include (a) liquid mixtures of CO{sub 2}-philic polydisperse oligomers, (b) small, volatile, liquid CO{sub 2}-philic solvents, and (c) CO{sub 2}-philic solids capable of melting in the presence of CO{sub 2}. The objective of this study was to identify alternative physical solvents that would selectively dissolve only CO{sub 2} from this mixture. The first phase of our research involved the comparison of the CO{sub 2} solvent strength of PEGDME with that of other low volatility oligomers that are known to be “CO{sub 2}-philic”. Small volatile CO{sub 2} solvents were also examined in the second phase of this work. Lastly, solid CO{sub 2}-philes have been investigated as a potential CO{sub 2} solvent.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- DE-FE-0004000
- OSTI ID:
- 1052848
- Report Number(s):
- TPR-3534
- Journal Information:
- Abstracts of Papers of the American Chemical Society, Vol. 241; Conference: American Chemical Society Meeting, March 27-31, 2011, Anaheim, CA
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
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