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AssigneeThe United States of America as represented by the Secretary of the Army
InventorsVeera M. Boddu, Tushar K. Ghosh, Kent James Hay, Dabir S. Viswanath
Estimating the term…
Perlite, particularly, perlite in powdered form, is employed to adsorb metals and metal compounds from fluids, in particular gases at elevated temperature. Treatment of perlite by boiling with sulfuric acid or suspending in a suspension of sulfur in carbon disulfide has been shown to significantly expand the surface area of perlite, thus increasing the efficiency of the process. In select embodiments, powdered perlite is treated to expand its surface area and injected into a fluid stream, such as flue gas, held for a specific retention period, and removed for subsequent disposal. In other embodiments powdered perlite is provided in an adsorption bed. Fluids containing metals or metal compounds in vapor form are permitted to pass through the adsorption bed until the expanded perlite powder is saturated (exhausted) with the metal and metal compounds adsorbed thereon. The perlite is then replaced, disposing of the exhausted perlite.
A method of treating a fluid flow containing vapor phase metals, vapor phase metal compounds, or both, comprising:
A method of treating a fluid flow containing vapor phase metals, vapor phase metal compounds, or both, comprising:
A method of treating a fluid containing vapor phase metals, vapor phase metal compounds, or both, comprising:
Dependencies are inferred from the claim text.