Abstract: A method for semi-continuous operation of a heat exchange process that alternates between two heat exchangers is disclosed. The method comprises, first, providing a contact liquid to a first heat exchanger while the second heat exchanger is on standby. The contact liquid contains a dissolved gas, an entrained gas, or residual small particles that foul the first heat exchanger by condensing or depositing as a foulant onto the first heat exchanger, restricting free flow of the contact liquid. Second, detecting a pressure drop across the first heat exchanger. Third, switching flows of the coolant from the first to the second heat exchanger. Fourth, removing the foulant from the now standby first heat exchanger by providing heat to the heat exchanger, passing a non-reactive gas through the heat exchanger, or a combination thereof. In this manner, the heat exchange process operates semi-continuously.

Abstract: Condensable vapors such as carbon dioxide are separated from light gases in a process stream. The systems and methods employ a circulating fluidized particle bed cooled by an out-bed heat exchanger to desublimate the solid form of condensable vapors from the process stream. Gas and solids may be sorted in a separator, and the solids may then be subcooled in a heat exchanger. The condensable vapors may be condensed on the bed particles or in the heat exchanger while the light gases from the process stream, which are not condensed, form a separated light-gas stream.

Abstract: A method for continuously removing water vapor from a carrier gas is disclosed. This method includes, first, causing direct contact of the carrier gas with a liquid mixture in a separation chamber, the carrier gas condensing at a lower temperature than the water vapor. A combination of chemical effects cause the water vapor to condense, complex, or both condense and complex with the liquid mixture.

Abstract: A method for continuously removing carbon dioxide vapor from a carrier gas is disclosed. This method includes, first, causing direct contact of the carrier gas with a liquid mixture in a separation chamber, the carrier gas condensing at a lower temperature than the carbon dioxide vapor. A combination of chemical effects cause the carbon dioxide to condense, complex, or both condense and complex with the liquid mixture.

Abstract: A method and device are disclosed herein for distributing a gas into a vessel. The method comprises providing a gas distribution apparatus, wherein an exposed surface of the apparatus comprises a material that inhibits adsorption of the gas and deposition of the gas' solid form. The material chosen is chemically repulsive to the gas and the gas' solid form. In this manner, desublimation of the gas and deposition of the gas' solid form onto the exposed surface is prevented. The device disclosed herein is the gas distribution apparatus referenced above.

Abstract: A method and device are disclosed herein for distributing a gas into a vessel. The method comprises providing a gas distribution apparatus, wherein an exposed surface of the apparatus comprises a material that inhibits adsorption of the gas and deposition of the gas' solid form. The material chosen is chemically repulsive to the gas and the gas' solid form. In this manner, desublimation of the gas and deposition of the gas' solid form onto the exposed surface is prevented. The device disclosed herein is the gas distribution apparatus referenced above.