Washington, DC - Four projects aimed at reducing the energy and cost penalties of advanced carbon capture systems applied to power plants have been selected for further development by the U.S. Department of Energy’s Office of Fossil Energy (FE).
Valued at approximately $67 million (including $15 million in non-federal cost sharing) over four years, the overall goal of the research is to develop carbon dioxide (CO2) capture and separation technologies that can achieve at least 90 percent CO2 removal at no more than a 35 percent increase in the cost of electricity. This would represent a significant improvement over projected increases in electricity costs using existing technologies.
Advanced CO2 power plant capture systems are a key element in carbon capture, utilization, and storage (CCUS) technologies, considered by some energy experts to be among the important options for reducing greenhouse gas emissions associated with possible climate change. Existing carbon capture systems currently require large amounts of energy for their operation, resulting in decreased efficiency and reduced net power output when compared to plants without CCUS technology. These penalties can add as much as 80 percent to the cost of electricity for a new pulverized coal plant.
Today’s selections focus on slipstream-scale development (0.5 to 5 MWe) and testing of advanced solvent-based post-combustion CO2 capture technologies. Post-combustion capture offers great near-term potential for reducing power sector CO2 emissions because it can be added to existing plants.
The projects, managed by FE’s National Energy Technology Laboratory include:
- Linde LLC (Murray Hill, New Jersey) - Slipstream Pilot Scale Demonstration of a Novel Amine-Based Post-Combustion Process Technology for CO2 Capture from Coal-Fired Power Plant Flue GasThe proposed project will use a post combustion capture technology incorporating BASF’s novel amine-based process at a 1 MWe equivalent slipstream pilot plant at the National Carbon Capture Center. This technology offers significant benefits as it aims to reduce the regeneration energy requirements using novel solvents that are stable under the coal-fired power plant feed gas conditions. The Department of Energy will contribute $15,000,000 to the project.
- Neumann Systems Group, Inc. (NSG) (Colorado Springs, CO) - Carbon Absorber Retrofit Equipment (CARE)This project, located at the Colorado Springs Drake #7 power plant, will design, construct, and test a patented NeuStreamTM absorber. The absorber will use nozzle technology proven during a recently completed 20 megawatt NeuStream-S flue gas desulfurization pilot project, and an advanced solvent that efficiently captures CO2. This absorber technology is applicable to a variety of solvents and can be added to existing pulverized coal power plants with reduced cost and footprint. Because of the modularity of the NeuStream technology, it can be rapidly scaled to larger size systems and retrofitted into existing plants with little risk. The Department of Energy will contribute $7,165,423 to the project.
- Southern Company (Atlanta, GA) - Development and Demonstration of Waste Heat Integration with Solvent Process for More Efficient CO2 Removal from Coal-Fired Flue GasSouthern Company will develop viable heat integration methods for the capture of CO2 produced from pulverized coal combustion using a waste heat recovery technology, High Efficiency System. This technology will be integrated into an existing 25 megawatt pilot amine-based CO2 capture process (KM-CDR) at Southern Company’s Plant Barry. Modeling by Mitsubishi Heavy Industries America indicates that a fully heat integrated High Efficiency System will improve by 26 percent the thermal energy performance of the integrated KM-CDR and plant operation. The Department of Energy will contribute $15,000,000 to the project.
- University of Kentucky Research Foundation (Lexington, KY) - Application of a Heat Integrated Post-Combustion CO2 Capture System with Hitachi Advanced Solvent into Existing Coal-Fired Power PlantResearchers plan to use an innovative heat integration method that uses waste heat from a Hitachi H3-1 advanced solvent carbon capture system while improving steam turbine efficiency. The proposed process also implements a process concept (working with the heat integration method) that increases solvent capacity and capture rate in the CO2 scrubber. The novel concepts and advanced solvent used in this study will significantly improve the overall plant efficiency when integrated with CO2 capture systems, and can be applied to existing coal-fired power plants. The Department of Energy will contribute $14,502,144 to the project.