Further Options for CO2 Capture: Phase Change and Ca-looping
Speaker: Stefano Consonni, Department of Energy Engineering of Politecnico di Milano
Department: Mechanical & Aerospace Engineering
Location: Guyot M171
Date/Time: Wednesday, October 17, 2012, 12:00 p.m. - 1:30 p.m.
A Special Energy Group Seminar will be held on Wednesday, October 17th, from 12:00pm to 1:20 pm in Guyot M171. Prof Stefano Consonni will give a talk on "Further Options for CO2 capture: Phase change and Ca-looping". Lunch will be served at 11:50 am. The presentation will begin at 12:00pm, and will end around 1:00pm. Then feel free to continue a free style discussion with Prof Consonni if you have time and interest.
Please RSVP to Ildiko Kohles (ikohles@exchange.Princeton.EDU) by 4 pm Friday, October 12, if you plan to attend the seminar. Thanks.
Title: Further Options for CO2 capture: Phase change and Ca-looping
Among the many strategies and technologies for the reduction of greenhouse gas emissions, CO2 capture offers the unique feature of decoupling the emissions of CO2 from the use of fossil fuels. This can be achieved by either acting on the fossil fuel (fuel decarbonization), on the oxidant (oxy-fuel systems) or on the oxidation products (post-combustion capture).
The Department of Energy of Politecnico di Milano has been pursuing research on a wide array of CO2 capture technologies for nearly two decades. This seminar illustrates recent work on two new options for coal-fired power plants:
1) fuel decarbonization via gasification and CO2 separation by phase change;
2) post-combustion capture by a calcium-based loop integrated with cement kilns.
In the first option, CO2 is captured at high pressure and cryogenic temperatures from the syngas generated by a coal gasifier; potential advantages are lower energy consumption, lower capital costs and somewhat easier operation.
In the second option, CO2 is captured from the flue gases of a coal-fired power station by letting them react with calcium oxide at atmospheric pressure and temperature around 650°C; calcium oxide is then regenerated at around 950°C in a calciner. Feeding the CaO purged from the calciner into a cement kiln offers the potential for significant reductions of energy consumption and costs.
After an overview of the physical bases and the plant configurations, the seminar will give indications on achievable performances and the standing with respect to other, more established capture technologies.