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- W4328112174 abstract "Abstract Carbon dioxide storage technologies are needed not only to store the carbon captured in the emissions of hard-to-abate sectors but also for some carbon dioxide removal technologies requiring a final and permanent storage of CO 2 . The pace and scale of geological CO 2 storage deployment have fallen short of expectations, and there is a growing interest in ocean-based CO 2 storage options. As complementary to geological storage, buffered accelerated weathering of limestone (BAWL) has been proposed to produce a buffered ionic solution at seawater pH, derived from the reaction in seawater between a CO 2 stream and a micron-sized powder of calcium carbonate (CaCO 3 ), within a long tubular reactor. The addition of calcium hydroxide to buffer the unreacted CO 2 before the discharge in seawater is also envisaged. BAWL avoids the risks of CO 2 degassing back into the atmosphere and does not induce seawater acidification. This work presents a mass and energy balance and preliminary cost analysis of the technology for different configurations of discharge depth (100, 500, 3,000 m), pipeline length (10, 25, 100 km) and diameter of CaCO 3 particles (1, 2, 10 µm) fed in the tubular reactor. The total energy consumption to capture and store 1 t of CO 2 generated by a steam-methane reforming (SMR) process ranges from 1.3 to 2.2 MWh. The CO 2 released from the CaCO 3 calcination to produce the buffering solution leads to a total CO 2 storage requirement 43–85% higher than the CO 2 derived by SMR. The total cost to capture and store 1 t of CO 2 from SMR is estimated in the range 142–189 €." @default.
- W4328112174 created "2023-03-22" @default.
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- W4328112174 date "2023-03-01" @default.
- W4328112174 modified "2023-09-26" @default.
- W4328112174 title "Techno-economic evaluation of buffered accelerated weathering of limestone as a CO2 capture and storage option" @default.
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- W4328112174 doi "https://doi.org/10.1007/s11027-023-10052-x" @default.
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