CO2-sequestering formed building materials
CO 2 -sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO 2 -sequestering formed building material.
1. A method for producing a formed building material comprising:
a) producing a metastable CO 2 -sequestering component from a saltwater water solution of divalent cations and a gaseous waste stream comprising CO 2 ; wherein the metastable CO 2 -sequestering component, upon contact with freshwater, re-precipitates into a freshwater stable compound; and
b) forming the formed building material from the metastable CO 2 -sequestering component in a process comprising contacting the CO 2 -sequestering component with freshwater, wherein the formed building material has a defined physical shape.
2. The method of claim 1 , wherein the formed building material comprises 5% to 50% (w/w) CO 2 -sequestering component.
3. The method of claim 1 , wherein the CO 2 -sequestering component comprises carbonates.
4. The method of claim 3 , wherein the CO 2 -sequestering component further comprises co-products of NOx, SOx, VOCs, particulates, mercury, or a combination thereof resulting from conditions used to convert carbon dioxide to carbonates.
5. The method of claim 1 , wherein the gaseous waste stream further comprises NOx, SOx, VOCs, particulates, mercury, or a combination thereof.
6. The method of claim 1 , wherein the formed building material has a carbon footprint that is neutral or negative.
7. The method of claim 6 , wherein water for forming the formed building material is provided by the CO 2 -sequestering component.
8. The method of claim 7 , wherein the CO 2 -sequestering component provides at least 50% of the water for forming the formed building material.
9. The method of claim 6 , wherein the formed building material continuously reduces carbon emission via reduced lighting demands due to the high albedo of the formed building material.