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Full-Text Articles in Engineering
Ultrasound-Intensified Mineral Carbonation, Rafael M. Santos, Davy Francois, Gilles Mertens, Jan Elsen, Tom Van Gerven
Ultrasound-Intensified Mineral Carbonation, Rafael M. Santos, Davy Francois, Gilles Mertens, Jan Elsen, Tom Van Gerven
Faculty Publications and Scholarship
Several aspects of ultrasound-assisted mineral carbonation were investigated in this work. The objectives were to intensify the CO2 sequestration process to improve reaction kinetics and maximal conversion. Stainless steel slags, derived from the Argon Oxygen Decarburization (AOD) and Continuous Casting / Ladle Metallurgy (CC/LM) refining steps, were used for assessing the technical feasibility of this concept, as they are potential carbon sinks and can benefit from reduction in alkalinity (pH) by mineral carbonation. Ultrasound was applied by use of an ultrasound horn into the reaction slurry, where mineral carbonation reaction took place at 50 oC for up to …
Synthesis Of Pure Aragonite By Sonochemical Mineral Carbonation., Rafael M. Santos, Pieter Ceulemans, Tom Van Gerven
Synthesis Of Pure Aragonite By Sonochemical Mineral Carbonation., Rafael M. Santos, Pieter Ceulemans, Tom Van Gerven
Faculty Publications and Scholarship
The objective of this work was to promote the formation of the aragonite polymorph of calcium carbonate, which has some valuable applications in industry, via the mineral carbonation route. The combination of ultrasound with magnesium ions promoted the formation of pure aragonite crystals at optimum conditions. It was possible to synthesize high purity aragonite precipitates at temperatures ranging from 24 oC to 70 oC, with the resulting powders possessing varying particle size distributions (from sub-micron up to 20 μm) and crystal morphologies (from acicular needles to novel hubbard squash-like particles). Several process parameters were found to influence the …
Process Intensification Routes For Mineral Carbonation, Rafael M. Santos, Tom Van Gerven
Process Intensification Routes For Mineral Carbonation, Rafael M. Santos, Tom Van Gerven
Faculty Publications and Scholarship
Mineral carbonation is a realistic route for capture and storage of carbon dioxide. The principal advantages of this approach are the chemical stability and storage safety of mineral carbonates, the opportunities for process integration available, and the potential for conversion of low-value materials into useful products. In this work the valorisation of alkaline waste materials from thermal processes by mineral carbonation utilizing intensified and integrated mineral carbonation routes is explored. Process intensification is the chemical engineering of the 21st century, and aims at providing the paradigm-shifting techniques that will revolutionize the industry. The combination of process intensification and process integration …