Carbon dioxide (CO2) capture and storage (CCS) is a key technology to reduce anthropogenic greenhouse gas emissions and mitigate the potential effects of climate change. While focus on CCS technologies for coal-fired power plants has been given, its evaluation on natural gas-fired power plants is limited. A promising technology for separating CO2 from the exhaust of fossil-fueled power plants is gas separation membranes. This research seeks to evaluate both the technical and economic potential of gas separation membranes for use on a natural gas combined cycle (NGCC). A hybrid process of exhaust gas recirculation (EGR) is combined with inlet combustion air as a sweep gas, thereby increasing CO2 concentrations in the flue gas to levels that are suitable for membrane separation. Two capture cases are presented, a 35% EGR Case and a 50% EGR Case, and are compared to a base case NGCC without capture. Efficiencies on capture cases approach 49% and increase the cost of electricity by 40% which represents a roughly $70/ton-CO 2 avoided cost. Both capture cases are able to separate approximately 88% of the CO2 that would have been emitted absent control technologies. Compared to other carbon capture technologies being developed and explored for use on NGCC power plants, this novel approach shows promise and should be considered under a portfolio of technologies capable of being deployed on NGCC power plants with carbon capture.
|Advisor:||Garris, Charles A., Rozelle, Peter L.|
|Commitee:||Bardet, Philippe M., Duffey, Michael R.|
|School:||The George Washington University|
|Department:||Mechanical and Aerospace Engineering|
|School Location:||United States -- District of Columbia|
|Source:||MAI 50/05M, Masters Abstracts International|
|Subjects:||Environmental economics, Mechanical engineering, Environmental engineering, Energy|
|Keywords:||Carbon capture and storage, Electricity costs, Exhaust gas recirculation, Membranes, Natural gas combined cycle|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be