Catalytic Activity of Solution Additive Anions for Magnesite and Calcite Precipitation in Microwave‐Assisted Mineral Carbonation Experiments DOI Creative Commons
Marcello Campione, D. D’Alessio, Mattia Corti

и другие.

Advanced Energy and Sustainability Research, Год журнала: 2025, Номер unknown

Опубликована: Май 11, 2025

Identifying catalytic routes for magnesite and calcite precipitation from Mg‐ Ca‐bearing minerals is key to developing carbon‐neutral or negative industrial processes. This study experimentally evaluates the activity of over 20 environmentally friendly additive anions—including carboxylates, inorganics, ammonium salts—for promoting formation during carbonation brucite [Mg(OH) 2 ] portlandite [Ca(OH) in aqueous slurries. Carbonation driven by microwave (MW)‐assisted heating at 100–200 °C under hydrothermal conditions, with CO partial pressures below 8 bar. Results reveal a significant enhancement when additives are combined MW energy, enabling crystallization much lower temperatures. For calcite, MWs alone nearly double yield, further improvements presence additives. Among promising catalyzers, chelating agents like citrate tartrate increase induction times reduce overall yield higher concentrations. In contrast, forming simple ion pairs—such as acetate sulfate—show improved performance increased concentration. These findings highlight importance selection energy optimizing mineral sustainable applications.

Язык: Английский

Catalytic Activity of Solution Additive Anions for Magnesite and Calcite Precipitation in Microwave‐Assisted Mineral Carbonation Experiments DOI Creative Commons
Marcello Campione, D. D’Alessio, Mattia Corti

и другие.

Advanced Energy and Sustainability Research, Год журнала: 2025, Номер unknown

Опубликована: Май 11, 2025

Identifying catalytic routes for magnesite and calcite precipitation from Mg‐ Ca‐bearing minerals is key to developing carbon‐neutral or negative industrial processes. This study experimentally evaluates the activity of over 20 environmentally friendly additive anions—including carboxylates, inorganics, ammonium salts—for promoting formation during carbonation brucite [Mg(OH) 2 ] portlandite [Ca(OH) in aqueous slurries. Carbonation driven by microwave (MW)‐assisted heating at 100–200 °C under hydrothermal conditions, with CO partial pressures below 8 bar. Results reveal a significant enhancement when additives are combined MW energy, enabling crystallization much lower temperatures. For calcite, MWs alone nearly double yield, further improvements presence additives. Among promising catalyzers, chelating agents like citrate tartrate increase induction times reduce overall yield higher concentrations. In contrast, forming simple ion pairs—such as acetate sulfate—show improved performance increased concentration. These findings highlight importance selection energy optimizing mineral sustainable applications.

Язык: Английский

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