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Title: Carbon dioxide capture and separation techniques for advanced power generation point sources

The capture/separation step for carbon dioxide (CO2) from large-point sources is a critical one with respect to the technical feasibility and cost of the overall carbon sequestration scenario. For large-point sources, such as those found in power generation, the carbon dioxide capture techniques being investigated by the in-house research area of the National Energy Technology Laboratory possess the potential for improved efficiency and costs as compared to more conventional technologies. The investigated techniques can have wide applications, but the research has focused on capture/separation of carbon dioxide from flue gas (postcombustion from fossil fuel-fired combustors) and from fuel gas (precombustion, such as integrated gasification combined cycle – IGCC). With respect to fuel gas applications, novel concepts are being developed in wet scrubbing with physical absorption; chemical absorption with solid sorbents; and separation by membranes. In one concept, a wet scrubbing technique is being investigated that uses a physical solvent process to remove CO2 from fuel gas of an IGCC system at elevated temperature and pressure. The need to define an ideal solvent has led to the study of the solubility and mass transfer properties of various solvents. Fabrication techniques and mechanistic studies for hybrid membranes separating CO2 from the fuelmore » gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic silanes incorporated into an alumina support or ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. An overview of two novel techniques is presented along with a research progress status of each technology.« less
Authors:
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Publication Date:
OSTI Identifier:
938471
Report Number(s):
DOE/NETL-IR-2006-202; NETL-TPR-1451
TRN: US200908%%374
DOE Contract Number:
None cited
Resource Type:
Conference
Resource Relation:
Conference: 23rd Annual International Pittsburgh Coal Conference, Pittsburgh, PA, Sept. 25-28, 2006
Publisher:
University of Pittsburgh School of Engineering, Pittsburgh, PA
Research Org:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR
Sponsoring Org:
USDOE - Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CARBON DIOXIDE; CARBON SEQUESTRATION; COAL; COAL GASIFICATION; COMBINED CYCLES; FIELD TESTS; FLUE GAS; FUEL GAS; MASS TRANSFER; MEMBRANES; PITTSBURGH; POINT SOURCES; POWER GENERATION; POWER PLANTS; SERVICE LIFE