Granted Patent B2

US 7,939,336 · App. 12/571,400 · Granted May 10, 2011

Assignee: Calera Corporation

Abstract

Claims (15)

1. A method of verifying the origin of carbon in a synthetic carbonate composition derived from a combustion of a fossil fuel source comprising:

i) evaluating the source of the carbon in the synthetic carbonate composition derived from the combustion of a fossil fuel source by

(a) determining a relative carbon isotope composition δ 13 C value for the composition;

(b) comparing the value determined in step (a) with a second δ 13 C value of a known source; and

(c) verifying that the composition comprises carbon derived from a fossil fuel source based on the result of the comparison of step (b) and confirming that the δ 13 C value for the composition is more like to δ 13 C values derived from plant-derived sources than δ 13 C values derived from atmospheric carbon dioxide or non-planted-derived marine sources of carbon;

ii) measuring the carbon content of the composition; and

iii) quantifying an amount of carbon dioxide that is sequestered in the composition.

2. The method of claim 1 wherein the composition is a building material or a material for underground storage.

3. The method of claim 1 wherein the composition is a cementitious composition or an aggregate.

4. The method of claim 1 wherein the composition is a composition for storage of CO 2 .

5. The method of claim 1 further comprising determining a stability of the composition for release of CO 2 .

6. The method of claim 1 wherein the second δ 13 C value of step i) (b) is a reference δ 13 C value.

7. The method of claim 6 , wherein the reference δ 13 C value is −10%.

8. The method of claim 1 wherein the second δ 13 C value of step i) (b) is a value for a possible raw material for the composition.

9. The method of claim 6 wherein the second δ 13 C value is a value for a fossil fuel or a flue gas derived from said fossil fuel.

Assignments (2)

Continuity (19)