Processes for removing perfluoroalkyl substances and regenerating an adsorbent used with same
AssigneeUop LLC
InventorsAmanda J. Hickman, Erin M. Broderick, Susan C. Koster, Benjamin D. Yuhas, Aric G. Fisher, William J. Whyman, Gregory B. Kuzmanich
Life of this patent
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Abstract
Processes and apparatuses for degrading PFAS into calcium fluoride, carbon dioxide, and water. PFAS are heated and introduced to a calcium base which will degrade the PFAS. The PFAS may be in a stream that is a PFAS enriched stream formed by desorbing the PFAS from an adsorbent which removed the PFAS from a contaminant stream. The PFAS may be desorbed in the presence of the calcium base. The calcium base may be calcium hydroxide, calcium oxide, calcium carbonate, or combinations thereof.
Claims9
A process for degradation of PFAS, the process comprising:
- heating PFAS to provide a heated PFAS stream;
- and,
- introducing the heated PFAS stream to a vessel containing a calcium base so as to convert the PFAS into calcium fluoride, carbon dioxide, and water,
- wherein a molar ratio of calcium to fluoride in the vessel is between 1.0 to 10.
Dependencies are inferred from the claim text.