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Title: Carbon Dioxide Capture and Separation Techniques for Gasification-based 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 reduced 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 (post-combustion from fossil fuel-fired combustors) and from fuel gas (precombustion, such as integrated gasification combined cycle or 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. Pertaining to another separation technology, fabrication techniques and mechanistic studies for membranesmore » separating CO2 from the fuel gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. Finally, dry, regenerable processes based on sorbents are additional techniques for CO2 capture from fuel gas. An overview of these novel techniques is presented along with a research progress status of technologies related to membranes and physical solvents.« less
Authors:
; ; ;  [1] ;  [1] ;  [2]
  1. (Univ. of Pittsburgh, PA)
  2. (Parsons)
Publication Date:
OSTI Identifier:
915509
Report Number(s):
DOE/NETL-IR-2007-155
TRN: US200817%%548
DOE Contract Number:
None cited
Resource Type:
Conference
Resource Relation:
Conference: A&WMA (Air & Waste Management Association) 100th Annual Conference & Exhibition, Pittsburgh, PA, June 26-29, 2007
Publisher:
Air & Waste Management Association, Pittsburgh, PA
Research Org:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV
Sponsoring Org:
USDOE - Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 10 SYNTHETIC FUELS; AIR; CARBON DIOXIDE; CARBON SEQUESTRATION; COAL GASIFICATION; COMBINED CYCLES; FLUE GAS; FUEL GAS; GASIFICATION; MASS TRANSFER; MEMBRANES; POINT SOURCES; POWER GENERATION; WASTE MANAGEMENT Carbon dioxide, Carbon capture and separation