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Abstract
At reservoir conditionscarbon dioxide is a supercritical fluid capable of extraction of naturallyoccurring neutral compounds from formation materials, including carboxylicacids at low pH. We performed a series of experiments designed to quantify theextractable carboxylic acid and neutral aromatic yield from coal of the WilcoxGroup in Louisiana. We determined concentrations of organic species in both the aqueous phase and carbon dioxide phases during batch reactions of rock with the two fluid phases. The concentration patterns observed following preliminary experiments indicate that high concentrations of aromatic acids are observed preferentially in the supercritical phase whereas aliphatic short-chain and dicarboxylic acids are preferentially found in the aqueousphase. We conclude that organic-rich rocks such as coal will be sources of organic acids following geologic CO2 sequestration. Organic compound liberation from rocks has important implications for the subsurface microbial community and weathering rates of seal and reservoir silicates.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Extraction of organic compounds from organic-rich rocks during geologic CO2 sequestration at supercritical conditions |
| Year Published | 2010 |
| Language | English |
| Publisher | American Chemical Society |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | ACS National Meeting book of abstracts |
| Conference Title | 239th ACS National Meeting and Exposition |
| Conference Location | San Francisco, California, United States |
| Conference Date | March 21-25, 2010 |
| Google Analytic Metrics | Metrics page |