Lu et al. (2025): Process modelling and analysis of ikaite production for atmospheric CO₂ removal through ocean alkalinity enhancement
Xuesong Lu, Rachel Millar, Pranav Toutam, Aidong Yang, Spyros Foteinis, Laura Bastianini, Phil Renforth, Stefan Baltruschat, Jens Hartmann, IN: Chemical Engineering Research and Design, https://doi.org/10.1016/j.cherd.2025.12.028
The production of ikaite, a metastable calcium carbonate hydrate, offers a promising pathway for atmospheric CO₂ removal through ocean alkalinity enhancement. This study explores the feasibility of ikaite production through a three-step process, involving calcite (CaCO₃) dissolution under elevated CO₂ pressure, CO₂ degassing from the calcium carbonate rich solution, and subsequent crystallisation.