Quantification of the effect of gas–water–equilibria on carbonate precipitation ...

• Main Authors: Zacherl, Lilly, Baumann, Thomas
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: figshare 2024
• Subjects: Space Science; Medicine; Environmental Sciences not elsewhere classified; Ecology; FOS: Biological sciences; Sociology; FOS: Sociology; Biological Sciences not elsewhere classified; Plant Biology; Carbonic acid
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.6624123; https://springernature.figshare.com/collections/Quantification_of_the_effect_of_gas_water_equilibria_on_carbonate_precipitation/6624123

Abstract The expanding geothermal energy sector still faces performance issues due to scalings in pipes and surface level installations, which require elevated operation pressure levels and costly maintenance. For facilities in the North Alpine Foreland Basin, the precipitation of $${\hbox {CaCO}}_{3}$$ CaCO 3 is the main problem which is a consequence of the disruption of the lime-carbonic acid equilibrium during production. The formation of gas bubbles plays a key role in the scaling process. This work presents experiments in a bubble column to quantify the effects of gas stripping on carbonate precipitation and an extension of PhreeqC to include kinetic exchange between a gas phase and water for the simulation of the experimental results. With the same hybrid model not only precipitation of $${\hbox {CaCO}}_{3}$$ CaCO 3 but also the dissolution of scalings by the injection of $${\hbox {CO}}_{2}$$ CO 2 could be quantified. The bubble column was filled with tap water and brine. By varying the ionic strength ...