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Prospects in Waste Oil Shale Ash Sustainable Valorization

Authors: Olga Velts, Mai Uibu, Juha Kallas, Rein Kuusik


An innovative approach utilizing highly alkaline oil shale waste ash and carbon dioxide gas (CO2), associated with power production, as a resource for production of precipitated calcium carbonate (PCC) is introduced in this paper. The specifics and feasibility of the integrated ash valorization and CO2 sequestration process by indirect aqueous carbonation of lime-consisting ash were elaborated and the main parameters established. Detailed description of the formed precipitates was included. Complimentary carbonation experiments with commercial CaO fine powder were conducted for comparative characterization of the final products obtained on the basis of two different raw materials. Finally, the expected CO2 uptake was evaluated.

Keywords: Waste Valorization, calcium carbonate, carbon dioxide sequestration, Oil Shale Ash

Digital Object Identifier (DOI):

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