Calcite, dolomite and magnesite dissolution kinetics in aqueous solutions at acid to circumneutral pH, 25 to 150 °C and 1 to 55 atm pCO2: New constraints on CO2 sequestration in sedimentary basins

Dissolution rates of calcite, dolomite and magnesite were measured at 25, 60, 100 and 150 °C at far from equilibrium conditions in 0.1 M NaCl solutions of pH from 3 to 6 as a function of bicarbonate ion concentration (10− 5 M ≤ [NaHCO3] ≤ 0.1 M) and CO2 partial pressure (1 ≤ pCO2 ≤ 55 atm). In solutions without initially added NaHCO3, calcite dissolution rates (R) increase with pCO2 (and equilibrium H+ activity); however, recalculation of rates...