Post-Combustion

Combined Pressure, Temperature Contrast, and Surface-Enhanced Separation of Carbon Dioxide (CO2) for Post-Combustion Carbon Capture
Project No.: DE-FE0007531

Rice University is investigating CO2-capture cost-reduction opportunities by developing a novel gas absorption process.  Specific project research topics include the following:

  • Combining the absorber and stripper columns into a single, integrated unit.
  • The use of vacuum stripping in combination with waste heatfor regeneration of carbon dioxide (CO2) absorbent.
  • The use of a very high surface area ceramic foam gas-liquid contactor for enhanced mass transfer.
  • Preparing surfaces of the ceramic foam gas-liquid contactor with basic and acidic functional groups to enhance mass transfer during gas absorption and stripping, respectively.
  • Determining the best absorbent and operating conditions for the process.
Schematic of Combined Pressure and Temperature Contrast and Surface-enhanced Separation of CO2
Schematic of Combined Pressure and Temperature Contrast and Surface-enhanced Separation of CO2 
(click to enlarge)

A bench-scale prototype of the gas absorption process will be developed to study various aspects of fluid flow in the system.  A simulation model for the process is also being developed to optimize the properties of ceramics being used and the process operating conditions.

The expected outcomes of this project include significant reduction in the capital and operating costs of the gas absorption process and a resulting decrease in cost of electricity (COE).  The use of waste heat instead of high-quality steam provides a significant reduction in operating costs.  An integrated absorber and stripper unit substantially reduces capital costs.

Related Papers and Publications:

Contacts:

  • For further information on this project, contact the NETL Project Manager, Elaine Everitt.
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