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The cost of meeting increased cooling-water demands for CO2 capture and storage utilizing non-traditional waters from geologic saline formations |
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| Authors: | Geoffrey T Klise Jesse D Roach Peter H Kobos Jason E Heath Karen A Gutierrez |
| Institution: | 1. Sandia National Laboratories, Earth Systems Analysis Dept., PO Box 5800, MS 0735, Albuquerque, NM, 87185-0735, USA 2. Sandia National Laboratories, Geomechanics Dept., PO Box 5800, MS 0750, Albuquerque, NM, 87185-0750, USA 3. Sandia National Laboratories, Geotechnology and Engineering Dept., PO Box 5800, MS 0750, Albuquerque, NM, 87185-070, USA |
| Abstract: | Deep (> ～800 m) saline water-bearing formations in the United States have substantial pore volume that is targeted for storage of carbon dioxide (CO2) and the associated saline water can be extracted to increase CO2 storage efficiency, manage pressure build up, and create a new water source that, once treated, can be used for power-plant cooling or other purposes. Extraction, treatment and disposal costs of saline formation water to meet added water demands from CO2 capture and storage (CCS) are discussed. This underutilized water source may be important in meeting new water demand associated with CCS. For a representative natural gas combined-cycle (NGCC) power plant, simultaneous extraction of brine from the storage formation could provide enough water to meet all CCS-related cooling demands for 177 out of the 185 (96 %) saline formations analyzed in this study. Calculated total cost of water extraction, treatment and disposal is less than 4.00 US Dollars (USD) m?3 for 93 % of the 185 formations considered. In 90 % of 185 formations, treated water costs are less than 10.00 USD tonne?1 of CO2 injected. On average, this represents approximately 6 % of the total CO2 capture and injection costs for the NGCC scenario. |
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