Economical Two-Stage Membrane Process for CO2 Capture from Flue Gas of Power Plants

A portfolio of technologies and methods for CO2 capture that does not require complex or prohibitively large components.

The Need

There has been growing concern about global warming since the CO2 concentration in the atmosphere has surpassed 400 ppm in the past decade. The combustion of fossil fuels is one of the major contributors to the large amount of CO2 emission, and membrane technologies have been suggested as a promising approach to capture CO2 from large stationary sources (e.g., flue gases from coal-fired and natural gas-fired power plants), followed by compression and geological sequestration. Multiple research efforts were dedicated in designing membrane processes that can capture 90% CO2 from the power plant flue gases with a CO2 purity of at least 95%.

The Technology

Researchers at The Ohio State University, led by Dr. Winston Ho, have developed various methods for CO2 capture. In one instance, researchers developed an economical two-stage membrane process for CO2 capture from the flue gas of power plants. Another novel method synthesizes PVAm membranes with amino acid salts as mobile carriers for CO2 separation applications. A third method consists of a novel amine-containing membrane incorporated with carbon nanotubes for CO2/N2 separation with a vacuum pulled on the permeate side.

Commercial Applications

  • CO2 capture, separation, and removal
  • Global warming mitigation

Benefits/ Advantages

  • The incorporated carbon nanotubes enhance membrane performance
  • CO2 capture cost is decreased
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