Comparison of Methods for Quantifying the Carbon Content of Carbonated Wood Ash

To assess mineral carbonation as a negative emission technology, the reliable quantification of the sequestered carbon is crucial. This study evaluates four methods for quantifying carbon sequestration by wood ash, through analyses of ash samples before and after lab‐scale carbonation, and compares the results to the theoretical storage potential determined using the Steinour equation. Results show that CHN elemental analysis and total carbon quantification provided consistent values for total carbon content and for the amount of CO 2 sequestered. Inorganic carbon was effectively quantified using both total/inorganic carbon analysis (TC/IC) analysis and volumetric calcimetry. The findings highlight the importance of selecting analytical methods and demonstrate that oversimplified thermogravimetric analysis (TGA) can lead to misinterpretation of sequestration results.