(202b) Carbon Filter Process Technology For Separating Carbon Dioxide From Flue Gas
A Carbon Filter Process (CFP) is developed and evaluated for separating carbon dioxide from power-plant flue gas relative to an amine-absorption benchmark process. The cost of recovered CO2 using the amine process is about $40-50/ton. The cost of recovered CO2 using a carbon-rich (carbonaceous) sorbent at low pressure can be reduced by a factor of 2 or more. Such a sorbent is selective at near ambient temperatures, easy to keep at constant sorption temperature, and easy to recover by direct steam heat because its heat of sorption is very low. The CFP technology can be integrated with a coal power plant toward producing an Enhanced Oil Recovery (EOR) grade CO2, which will be illustrated with laboratory and economic data for a Wyoming power plant.