Back to results
US 7,939,336 B2Granted
Compositions and methods using substances containing carbon
AssigneeCalera Corporation
InventorsBrent Constantz, James R. O'Neil, Sidney Omelon
Life of this patent
Estimating the term…
Abstract
Methods of characterizing and producing compositions with negative δ13C values are provided. Aspects of the invention include characterizing source materials and process products. Aspects of the invention also include compositions that contain carbon with negative δ13C values. Methods and techniques are provided for confirming that a given composition contains substances sequestered from a particular source e.g., fossil fuels.
Claims9
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 δ13C value for the composition;
- (b) comparing the value determined in step (a) with a second δ13C 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 δ13C value for the composition is more like to δ13C values derived from plant-derived sources than δ13C 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.
5 more elements
Dependencies are inferred from the claim text.