Fig. 5: Normalized Storage Efficiency Caused by Impurities (NSEI) at different pressures and temperatures. | Communications Engineering

Fig. 5: Normalized Storage Efficiency Caused by Impurities (NSEI) at different pressures and temperatures.

From: Economically viable geological CO2 storage from direct air capture has critical threshold of 70% CO2 concentration

Fig. 5

a 95% CO2; b 90% CO2; c 80% CO2; d 70% CO2; e 60% CO2; f 50% CO2. The white dash line represents inaccessible temperature-pressure boundaries. Pressure and temperature are impractical out of these boundaries. Blue area (low NSEI area) expands as the CO2 concentration decreases. The six reference CCS projects exhibit different NSEI values, owing to their distinct pressure and temperature conditions.

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