A mechanochemically carbonated natural pozzolan, methods of its production and uses therefof
AssigneeCarbon Upcycling Technologies Inc.
InventorApoorva SINHA
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Abstract
The present invention relates to a mechanically carbonated natural pozzolan which has a specific surface area within the range of 0.5-50 m2/g. The invention further relates to methods of its production and uses thereof, for example as a filler or binding agent. The invention further relates to compositions comprising the mechanically carbonated natural pozzolan and a further material selected from the group consisting of asphalt, cement, geopolymers, polymers and combinations thereof and methods of their production.
Claims21
-16. (canceled)
A mechanochemically carbonated natural pozzolan material obtainable by carbonation of a natural pozzolan precursor, wherein the mechanochemically carbonated natural pozzolan has a specific surface area within the range of 0.5-50 m2/g and wherein
- the ratio of the total carbon content of the mechanochemically carbonated natural pozzolan to the total carbon content of the natural pozzolan precursor is at least 1.5:1;
- and/or
- the ratio of the CO2 content of the mechanochemically carbonated natural pozzolan to the CO2 content of the natural pozzolan precursor is at least 1.1:1, wherein the CO2 content is determined as the mass loss above 450° C. measured by TGA employing a temperature trajectory wherein the temperature was increased from room temperature to 800° C. at a rate of 10° C./min.
A method for producing a mechanochemically carbonated natural pozzolan, said method comprising the following steps:
- a) providing a feedstock comprising or consisting of a natural pozzolan precursor;
- b) providing a gas comprising at least 0.5 vol % CO2;
- c) introducing said feedstock and said gas into a mechanical agitation unit;
- and
- d) subjecting the material of said feedstock to a mechanical agitation operation in the presence of said gas in said mechanical agitation unit.
Dependencies are inferred from the claim text.