Positive Power with Negative Emissions: Flexible NGCC Enabled by Modular Direct Air Capture
The Georgia Institute of Technology (Georgia Tech) will develop a modular direct air capture (DAC) process to be integrated with flexible natural gas-fired combined cycle (NGCC) power plants. This approach couples CO2 emissions capture from the NGCC plant using conventional technology with a novel design based on materials capable of removing CO2 from the air. The NGCC plant will run continuously, and the conventional technology will perform at its most efficient level. Steam and power from the natural gas plant are directed to remove CO2 from the atmosphere in times of low demand. The modular nature of the DAC system allows for partial operation, making it highly flexible and allowing power generators to respond to VRE production. It will also provide a pathway to scale up the technology for atmospheric capture of CO2. Emissions are reduced by 99% and then made negative with DAC of CO2.
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: