Application of a Heat Integrated Post-Combustion Carbon Dioxide Capture System with Hitachi Advanced Solvent into Existing Coal-Fired Power Plant

 

The 0.7 MWe slipstream testing facility
The 0.7 MWe slipstream testing facility
Performer: 
University of Kentucky Research Foundation
Website:  University of Kentucky
Award Number:  FE0007395
Project Duration:  10/01/2011 – 03/31/2020
Total Award Value:  $22,224,869
DOE Share:  $16,291,967
Performer Share:  $5,932,902
Technology Area:  Post-Combustion Capture
Key Technology:  Solvents
Location:  Lexington, KY

Project Description

The University of Kentucky Center for Applied Energy Research, in partnership with the Electric Power Research Institute, Mitsubishi Hitachi Power Systems America, and Smith Management Group, will develop a heat-integrated, pilot-scale, post-combustion carbon dioxide (CO2) capture system for a coal-fired power plant using an advanced solvent. A two-stage stripping concept will be implemented to increase capture rate in the CO2 absorber. In addition, a heat-integrated cooling tower system will also be implemented that uses regenerated CO2 stream waste heat to dry a liquid desiccant for removing moisture from the cooling air. This method decreases the relative humidity of the air, lowering the cooling water temperature and thereby reducing the steam turbine back pressure for efficiency improvement. A 0.7 megawatt electrical (MWe) equivalent slipstream facility will be designed, constructed, and installed at the Kentucky Utilities E.W. Brown Generating Station, located near Harrodsburg, Kentucky for testing the process. Parametric studies and long-term test campaigns will be performed using a conventional MEA solvent and Hitachi’s H3-1 advanced solvent to validate that the use of an advanced solvent results in less energy consumption and corrosion. Through previous testing, the H3-1 solvent has shown several advantages over conventional amine solvents, including a lower heat of regeneration, higher capacity, and less solvent degradation. A technical and economic analysis of the process concept for a 550 MWe power plant will be completed to determine its potential to achieve the Department of Energy target of no more than a 35 percent increase in the cost of electricity while capturing at least 90 percent of the CO2 released during the combustion of fossil fuels in existing coal-fired power plants.

Project Benefits

This project focuses on the design, construction, and testing of a post-combustion heat integrated solvent-based CO2 capture system with a two-stage stripping process for solvent regeneration and a heat-integrated cooling tower system that recovers waste energy from the carbon capture platform. The overall effect will be improved power plant cooling tower and steam turbine efficiency leading to decreased capital and operating costs. The novel concepts and advanced solvent used in this project show promise of improving the overall plant efficiency and can be utilized to retrofit existing coal-fired power plants. Specifically, this project will implement the heat-integrated system in a 0.7 MWe slipstream pilot-scale unit.

Contact Information

Federal Project Manager 
Isaac Aurelio: isaac.aurelio@netl.doe.gov
Technology Manager 
Lynn Brickett: lynn.brickett@netl.doe.gov
Principal Investigator 
Kunlei Liu: kunlei.liu@uky.edu
 

Click to view Presentations, Papers, and Publications