Abstract: The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon-containing gas stream (20); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (70); (c) separating the partially liquefied stream obtaining a liquid stream (90); (d) cooling the liquid stream (90) in a direct contact heat exchanger (200) obtaining a multiphase stream (201) containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid-liquid separator (202) obtaining a CO2 depleted liquid stream (141); (f) passing the CO2 depleted liquid stream (141) to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (206); (g) passing at least part of the further CO2 enriched slurry stream (206) to the direct contact heat exchanger (200) to provide cooling duty to and mix with the liquid stream (90).

Abstract: The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon-containing gas stream (20); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (70); (c) separating the partially liquefied stream obtaining a liquid stream (90); (d) cooling the liquid stream (90) in a direct contact heat exchanger (200) obtaining a multiphase stream (201) containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid-liquid separator (202) obtaining a CO2 depleted liquid stream (141); (f) passing the CO2 depleted liquid stream (141) to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (206); (g) passing at least part of the further CO2 enriched slurry stream (206) to the direct contact heat exchanger (200) to provide cooling duty to and mix with the liquid stream (90).

Abstract: The present invention provides a method to separate CO2 from a contaminated hydrocarbon-containing stream. The method comprises obtaining a multiphase contaminated hydrocarbon-containing stream (100) containing at least a vapour phase, a liquid phase and a solid phase, creating a slurry stream (120) from the multiphase stream. The slurry stream is fed to a crystallization chamber comprising CO2 seed particles. A liquid hydrocarbon stream (170) is obtained from the crystallization chamber (91) and a concentrated slurry (140) is obtained. The concentrated slurry (140) is removed from the crystallization chamber (91) by means of an extruder (142), thereby obtaining solid CO2. A feedback stream (141) is obtained from the solid CO2 comprising CO2 seed particles having an average size greater than 100 micron. The feedback stream (141) is passed into the crystallization chamber (91).

Abstract: A method and system for optimizing the performance of a rotodynamic multi-phase flow booster, such as a wet gas compressor, utilizes a meter which measures the fluid density &rgr; upstream of the booster and controls the speed of rotation &OHgr; of the rotor(s) of the booster, such that the booster operates at its best efficiency point (BEP) irrespective of variations of the fluid density &rgr;. Suitably the flow booster is a wet gas compressor having rotor and/or stator blades having a rough leading edge and non-wettable sides, which promote a favorable finely, dispersed mist flow so that the compressor also operates at its BEP if the compressed wet gas has a high liquid content.

Abstract: A method and system for optimizing the performance of a rotodynamic multi-phase flow booster, such as a wet gas compressor (1), utilizes a meter which measures the fluid density &rgr; upstream of the booster and controls the speed of rotation &OHgr; of the rotor(s) of the booster, such that the booster operates at its best efficiency point (BEP) irrespective of variations of the fluid density &rgr;. Suitably the flow booster is a wet gas compressor (1) having rotor and/or stator blades having a rough leading edge and non-wettable sides which promote a favorable finely dispersed mist flow so that the compressor (1) also operates at its BEP if the compressed wet gas has a high liquid content.