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Process and system for producing high-density pellets from a gaseous medium

United States Patent

6,003,332
December 21, 1999
View the Complete Patent at the US Patent & Trademark Office
A process and system for producing pellets of high density carbon dioxide or other gases utilize a chamber containing a plurality of cell-like freezing compartments within which ice is to be formed. A gas desired to be frozen into ice is introduced into the chamber while the internal pressure of the chamber is maintained at a level which is below the equilibrium triple pressure of the gas. The temperature of the freezing compartments is lowered to a temperature which is below the equilibrium vapor pressure temperature of the gas at the chamber pressure so that the gas condenses into ice within the compartments. The temperature of the freezing compartments is thereafter raised so that the ice is thereby released from and falls out of the compartments as pellets for collection.
Foster; Christopher A. (Clinton, TN)
Cyrogenic Applications F, Inc. (Clinton, TN)
09/ 085,319
May 26, 1998
This invention was made with Government support under Grant No. DE-FG05-94ER81734 awarded by the Department of Energy. The Government has certain rights in this invention.