title: 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 degrees 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.
authors.affiliation: Department of Mechanical Engineering and Energy Processes, Southern Illinois University - Carbondale, Carbondale, IL 62901, USA.
authors.forename: James C
authors.initials: JC
authors.lastname: Mabry
authors.forename: Kanchan
authors.initials: K
authors.lastname: Mondal
mesh_terms: D002119:Calcium Carbonate / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D055598:Chemical Phenomena; D006358:Hot Temperature; D008277:Magnesium Oxide / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D013501:Surface-Active Agents; D002245:Carbon Dioxide; D012967:Sodium Dodecyl Sulfate; D008277:Magnesium Oxide; D002119:Calcium Carbonate