Two-step mineral carbonation using seawater-based industrial wastewater: an eco-friendly carbon capture, utilization, and storage process

Formation and Transformation Trends of Metal Carbonates With Cation Ratio and Ion Interaction in Post-treatment Process of Desalination Brine

“…In a multi-cation system, the ratio of the mother solution determines which metal carbonate is formed. The properties of the produced metal carbonate vary according to the ratio of the precipitate [24,27]. On that basis, we quantified the dication molar composition and analyzed the changes in metal carbonate crystal properties, including crystal phase, by M.…”

“…Monohydrocalcite usually transforms into calcite through dehydration unless a specific Mg 2+ concentration exists in the system [24,27,42]. Furthermore, monohydrocalcite can only be produced when the [Mg 2+ ]/[Ca 2+ ] ratio of the mother solution, MS, is 0.17 or higher and [CO3 2-] is higher than [Ca 2+ ] of the mother solution [27]. The detailed conditions and processes for monohydrocalcite formation are shown in Fig.…”

“…The crystal phase detected in the samples was mostly monohydrocalcite (CaCO3•H2O), which is a metastable phase of the CaCO3 polymorph. Monohydrocalcite usually transforms into calcite through dehydration unless a specific Mg 2+ concentration exists in the system [24,27,42]. Furthermore, monohydrocalcite can only be produced when the [Mg 2+ ]/[Ca 2+ ] ratio of the mother solution, MS, is 0.17 or higher and [CO3 2-] is higher than [Ca 2+ ] of the mother solution [27].…”

“…The detailed conditions and processes for monohydrocalcite formation are shown in Fig. 11 [24,27,42,43]. M value of system CM is listed in table 6.…”

Innovative Gas-Liquid Membrane Contactor Systems for Carbon Capture and Mineralization in Energy Intensive Industries

“…CO 2 capture and utilization by mineralization (CCUM) is a distinct pathway for carbon capture, utilization, and storage (CCUS) that involves simultaneous CO 2 capture and chemical conversion into a stable product [ 1 ] and is currently considered as a promising technology with significant advantages over CO 2 capture with conventional technologies (i.e., absorption, adsorption) [ 2 ]. During mineralization, an exothermic reaction occurs between captured CO 2 and cations, such as Ca 2+ and Mg 2+ , derived from minerals or industrial waste, to produce metal carbonates [ 3 , 4 ]. Mineralization reduces natural resource use and converts waste to added-value products, thus promoting a circular economy [ 3 ] through an environmentally benign option [ 5 ].…”