The Value of CO2-Bulk Energy Storage to Reducing CO2 Emissions

Citations of this article
Mendeley users who have this article in their library.


Carbon-dioxide (CO2) bulk energy storage (CO2-BES) is an emerging CO2 capture, utilization, and storage (CCUS) approach that stores CO2 that is captured from large point sources (e.g., fossil-fuel power plants) to time-shift electricity generated from variable renewable energy technologies so that it matches demand. Excess electricity can be used to compress and inject CO2 into sedimentary-basin geothermal resources, which stores the excess electricity as pressure and directly reduces CO2 emissions. The stored energy can be produced and used when electricity demand exceeds supply. CO2-BES indirectly reduces CO2 emissions if this time-shifting displaces electricity that would otherwise be produced by power plants that emit CO2. As a result, CO2-BES can have direct and indirect value to reducing CO2 emissions. In this study we applied a linear optimization program that we developed to determine the indirect and direct value that CO2-BES could have to reducing CO2 emissions over a day, and used the Electricity Reliability Council of Texas (ERCOT) electricity system as a case study. Using a CO2 price of $13/tCO2, we found that CO2-BES has an indirect value of 1.98 tCO2/MWh and reduced CO2 emissions through two mechanisms: (1) enabling a greater utilization of electricity generated by wind energy technologies, and (2) enabling natural gas power plants to displace electricity generated by coal-fired power plants. CO2-BES did not have a direct value to reducing CO2 in this study because a CO2 price of $13/tCO2 is less than the ∼$50/tCO2 to ∼$70/t CO2 cost of directly capturing CO2 from fossil-fueled power plants.




Ogland-Hand, J. D., Bielicki, J. M., & Buscheck, T. A. (2017). The Value of CO2-Bulk Energy Storage to Reducing CO2 Emissions. In Energy Procedia (Vol. 114, pp. 6886–6892). Elsevier Ltd.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free