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Methods and apparatus for measuring small leaks from carbon dioxide sequestration facilities

United States Patent

9,857,267
January 2, 2018
View the Complete Patent at the US Patent & Trademark Office
In one embodiment, a CO.sub.2 leak detection instrument detects leaks from a site (e.g., a CO.sub.2 sequestration facility) using rapid concentration measurements of CO.sub.2, O.sub.2 and optionally water concentration that are achieved, for example, using laser spectroscopy (e.g. direct absorption laser spectroscopy). Water vapor in the sample gas may not be removed, or only partially removed. The sample gas may be collected using a multiplexed inlet assembly from a plurality of locations. CO.sub.2 and O.sub.2 concentrations may be corrected based on the water concentration. A resulting dataset of the CO.sub.2 and O.sub.2 concentrations is analyzed over time intervals to detect any changes in CO.sub.2 concentration that are not anti-correlated with O.sub.2 concentration, and to identify a potential CO.sub.2 leak in response thereto. The analysis may include determining eddy covariance flux measurements of sub-surface potential carbon.
Nelson, Jr.; David D. (N. Chelmsford, MA), Herndon; Scott C. (Littleton, MA)
Aerodyne Research, Inc. (Billerica, MA)
15/ 350,925
November 14, 2016
STATEMENT REGARDING FEDERALLY SUPPORTED RESEARCH This invention was made with Government support under DE-SC0013132 awarded by the Department of Energy. The Government has certain rights in this invention.