Abstract: Processes for chilling CO2 rich streams are described. The processes combine the use of a refrigerant mixture comprising CO2 and a first refrigerant capable of depressing the freezing point of CO2 to less than or equal to ?60° C. and a series of flash drums which reduce the temperature and pressure of the refrigerant mixture and concentrate the first refrigerant.

Abstract: Processes for recovery of carbon dioxide from a gas stream are described. The processes reduce dehydration cost in CO2 capture systems and minimize the formation of COS and H2O and enable water removal with an enhanced solvent-based absorbent operating at a lower temperature. This allows low residual water levels to be achieved in the dried gas. Also, feed streams containing high levels of CO2 and H2S can be treated in an integrated system comprising a cryogenic CO2 fractionation system, an overhead pressure swing adsorption (PSA) unit, and a CO2 temperature swing adsorption (TSA) unit. The processes allow recovery of helium and methane as well as CO2 and H2S.

Abstract: Processes and apparatuses for separating carbon monoxide from ethylene. The ethylene may be produced from biobased alcohol. The separation utilizes a fractionation column which produces a carbon monoxide depleted ethylene stream and an overhead stream comprising carbon monoxide and ethylene. The ethylene from the overhead stream may be recovered in an absorption zone with an absorbing liquid. A oxygenate fractionation zone may be utilized to remove oxygenates from the carbon monoxide depleted ethylene stream.