초록 ▼

A process for the regeneration of a CO2 gaseous stream such as are utilized in CO2 miscible flooding for petroleum recovery, is disclosed. The process utilizes an economic, low energy intensive cycle to regenerate a wide range of CO2 containing compositions, which are typically recycled for further

A process for the regeneration of a CO2 gaseous stream such as are utilized in CO2 miscible flooding for petroleum recovery, is disclosed. The process utilizes an economic, low energy intensive cycle to regenerate a wide range of CO2 containing compositions, which are typically recycled for further use.

대표청구항 ▼

A process comprising, regenerating a CO2 gaseous feed stream further containing a significant acid gas component having a CO2 concentration of about 60-90 mole %, as well as a variety of carbonaceous compounds, including, compressing and cooling the CO2 feed stream to a suitable elevated temperature

A process comprising, regenerating a CO2 gaseous feed stream further containing a significant acid gas component having a CO2 concentration of about 60-90 mole %, as well as a variety of carbonaceous compounds, including, compressing and cooling the CO2 feed stream to a suitable elevated temperature and superatmospheric pressure; substantially removing any acid gases present from the CO2 feed stream; drying the CO2 feed stream; separating the CO2 feed stream in a single distillation zone, which is primarily externally refrigerated, into: (a) a light fuel gas stream having a CO2 concentration sufficiently high to proclude freezing in said distillation zone, (b) a liquid, substantially CO2-containing stream of a purity sufficient for use in tertiary oil recovery, and (c) a heavy hydrocarbon stream; cooling the light fuel gas stream; pressurizing and transporting the substantially CO2-containing liquid stream into a suitable heat exchange zone; heating the CO2-containing liquid stream to a suitable temperature to form a suitable product stream; separating the heavy hydrocarbon stream into a lighter fuel gas stream and a heavier substantially CO2-free hydrocarbon stream.