Oxygen Storage Incorporated into the Allam Oxy-Fuel Power Cycle

Default ARPA-E Project Image

Program:
FLECCS
Award:
$762,953
Location:
San Antonio, Texas
Status:
ALUMNI
Project Term:
03/22/2021 - 06/21/2022
Website:

Critical Need:

Power plants equipped with carbon capture and storage (CCS) technologies can reduce the cost of net-zero carbon systems, but the addition of variable renewable energy (VRE) sources like wind and solar can make them difficult to design and operate while limiting their commercial potential. Increased cyclic operation of electricity generators could also reduce capacity factor and efficiency, increase operations and maintenance costs, and potentially increase CO2 emissions. Improving CCS processes and designs could enable a low-cost, net-zero carbon electricity system.

Project Innovation + Advantages:

Southwest Research Institute will apply energy storage to a natural gas, direct-fired supercritical carbon dioxide (sCO2) power generation cycle (Allam-Fetvedt cycle with near 100% carbon capture) by incorporating oxygen storage adjacent to the air separation unit (ASU). By operating the ASU at higher capacities when power from alternative energies is available (e.g., wind power at night or solar photovoltaic power during the day) and storing liquid oxygen (LOX), greater output from the power plant can be achieved during times of peak electricity demand. Using LOX’s vaporization cooling to reduce the compression power of CO2 needed for the power cycle can result in more savings. Because the ASU equipment is electrically driven, no change to the power block is required to produce up to 20% greater power plant output during peak demand.

Potential Impact:

Improvements in the design and processes of CCS-equipped plants in high VRE environments could dramatically reduce the cost of a net-zero carbon system. Benefits include:

Security:

Flexible CCS systems can enable the continued use of low-cost domestic fuel for electricity generation and increase the reliability of a deeply decarbonized electricity system.

Environment:

Flexible CCS systems can achieve high CO2 capture rates from flue gas. For example, a power generator could be enabled to shift the times it exports electricity to the grid, allowing the power generator and CCS plant to operate under steady-state conditions and with reduced emissions.

Economy:

Flexible CCS systems can reduce the cost of a net-zero carbon electricity system by providing dispatchable power to a high-VRE grid.

Contact

ARPA-E Program Director:
Dr. Jack Lewnard
Project Contact:
Dr. Jeffrey Moore
Press and General Inquiries Email:
ARPA-E-Comms@hq.doe.gov
Project Contact Email:
jeff.moore@swri.org

Related Projects

• 8 Rivers Capital - Enhancing Responsiveness of Gas Turbine Generators through Retrofitting with Exhaust Gas Recycle and a Phase-Change CO2 Capture Process
• Colorado State University (CSU) - Synergistic Heat Pumped Thermal Storage and Flexible Carbon Capture System
• Envergex - Flexible Low Temperature CO2 Capture System, E-CACHYS™
• General Electric (GE) Global Research - Flexible Oxy-Fuel Combustion for High-Penetration Variable Renewables
• Georgia Institute of Technology (Georgia Tech) - Positive Power with Negative Emissions: Flexible NGCC Enabled by Modular Direct Air Capture
• Linde - Process Integration & Optimization of an NGCC Power Plant W/Co2 Capture, Hydrogen Production & Storage
• Luna Innovations - Flexible FlueCO2
• Massachusetts Institute of Technology (MIT) - Power Plant CO2 Capture Integrated with Lime-based Direct Air Capture
• RTI International - Advanced Co2 Capture Solvent Systems for Dynamic Power
• Southwest Research Institute (SwRI) - Oxygen Storage Incorporated into the Allam Oxy-Fuel Power Cycle
• Susteon - A Rapid Temperature Swing Adsorption Carbon Capture Technology for Optimal Operation of a Fossil Power Plant
• University of Pittsburgh - Natural Gas/Direct Air Capture Hybrid Plant

Release Date:
07/13/2020