Magnesian calcite sorbent for carbon dioxide capture

Abstract

Magnesian calcite with controlled properties was synthesized for the removal of carbon dioxide. The results from characterization, reactivity and CO₂ capture capacity for different synthesis conditions are reported. The magnesian calcite samples (CaCO₃:MgCO₃) were synthesized by the coprecipitation of specific amounts of commercially available CaO and MgO by carbon dioxide. Characterization was done with BET, SEM/EDS, particle size analysis and XRD. The capacity was measured using TGA cycles at 800 °C and compared for different preparation conditions. The effects of CaO, MgO and surfactant loading on the physical properties and carbonation activity were studied to determine the optimal synthesis condition. A long‐term carbonation–calcination cycling test was conducted on the optimal sample. It was observed that the sample maintained its capacity to 86% of its original uptake even after 50 cycles.

Keywords:

• carbon dioxide removal
• carbon dioxide
• hydrogen enrichment
• hydrogen
• carbon dioxide sequestration

Acknowledgements

This research was conducted with funding available from the Vice Chancellor of Research at Southern Illinois University.