An experimental study of dolomite dissolution kinetics at conditions relevant to CO2 geological storage

摘要

The kinetics of dolomite dissolution have been experimentally investigated under subsurface conditions characteristic of the Rotliegend gas fields in the NE of The Netherlands. Experiments were performed in closed, stirred, batch reactors at far from equilibrium conditions, with dolomite powders of different grain sizes. The experiments were repeated for all grain sizes at 25 degrees C and an experiment was also conducted in deionized water. The rates were derived from the measured concentrations of Mg2+ or Ca2+ released from dolomite dissolution and were normalized by the surface area of the minerals at each time interval.