Abstract
Carbfix is a technology to permanently store captured CO2 and other sour gases from emission sources as rocks in the subsurface. CO2 charged water is injected into the basalts to promote the carbonization of CO2. The dissolution of CO2 into the aqueous phase facilitates the mineralization of CO2. It has been demonstrated that over 95% of CO2 captured and injected was turned into a rock in the subsurface in less than two years. In the original project, this technology aims to store CO2 from geothermal power plants in Iceland. However, it can be applied to the CO2 capture from a combined-cycle natural gas power plant as well. This study would like to apply this technology to store the CO2 from a combined-cycle natural gas power plant to achieve the near-zero emission target. Therefore, the CO2 storage process has to be modeled and optimized based on this technology. In this process, the water consumption is determined by the depth of the injection well, the temperature, and the water's salinity. The capital costs (injection wells, monitoring wells, injection surface facilities) and operating costs (maintenance, electricity, water cost) interact with each other. In this study, a detailed techno-economic evaluation of Carbfix technology is performed in the context of a 500 MW combined cycle power plant in the US. The sensitivity analysis is carried out with respect to water price, electricity price, equipment cost, etc. The key factors are identified based on the tornado diagram. This methodology can be integrated with the power plant and CO2 capture model to optimize the whole system simultaneously in future work.
Original language | English |
---|---|
Title of host publication | Computer Aided Chemical Engineering |
Number of pages | 7 |
Publisher | Elsevier Science Publishers B.V. |
Publication date | Jan 2021 |
Pages | 365-371 |
DOIs | |
Publication status | Published - Jan 2021 |
Externally published | Yes |
Series | Computer Aided Chemical Engineering |
---|---|
Volume | 50 |
ISSN | 1570-7946 |
Bibliographical note
Funding Information:This publication has been funded by LCEC CCUS Center. The authors would like to thank colleagues at Carbfix and MIT Energy Initiative. Specifically, they would like to thank K?ri Helgason and Bergur Sigf?sson from Carbfix.
Funding Information:
This publication has been funded by LCEC CCUS Center. The authors would like to thank colleagues at Carbfix and MIT Energy Initiative. Specifically, they would like to thank Kári Helgason and Bergur Sigfússon from Carbfix.
Publisher Copyright:
© 2021 Elsevier B.V.
Keywords
- capital cost
- Carbfix technology
- operating cost
- sensitivity analysis
- techno-economic evaluation