Carbon dioxide solidification

Methods of Liquefaction and Solidification. Carbon dioxide may be Hquefted at any temperature between its triple poiat (216.6 K) and its critical poiat (304 K) by compressing it to the corresponding Hquefaction pressure, and removing the heat of condensation. There are two Hquefaction processes. In the first, the carbon dioxide is Hquefted near the critical temperature water is used for cooling. This process requires compression of the carbon dioxide gas to pressures of about 7600 kPa (75 atm). The gas from the final compression stage is cooled to about 305 K and then filtered to remove water and entrained lubricating oil. The filtered carbon dioxide gas is then Hquefted ia a water-cooled condenser. 

T0746 STC Remediation, Inc., Solidification/Stabilization Technology T0755 Supercritical Carbon Dioxide Extraction—General T0779 Terra Vac, Inc., Vacuum Extraction... 

Quinn R, Appleby JB, Mathias PM, and Pez GP. Liquid salt hydrate acid gas absorbents An unusual desorption of carbon dioxide and hydrogen sulfide upon solidification. Sep. Sci. Technol. 1995 30 1711-1723. 

High Pressure Trapping with Subsequent Recovery by Solidification of the Carbon Dioxide... 

Nitrogen dioxide was used in mixtures with such combustibles as paraffin (without aromatic compounds), carbon disulphide or nitrobenzene. These substances were used in the proportions necessary to give complete decomposition into C02, H20 and N2, thus permitting full utilization of the oxygen present in the nitrogen dioxide. To prevent the solidification of nitrobenzene at low temperatures a binary combustible constituent, e.g. a mixture of nitrobenzene with carbon disulphide, was used. 

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