Centrifugal compressors are the preferred compression equipment for its higher reliability. However, when centrifugal compressors are designed to handle high CO2 and other acid gases such as H2S, special challenges must be addressed. Some of the key challenges are thermodynamic performance, materials selection, phase changes, hydrate formation, stability, and sealing. This paper presents how centrifugal compressors can be designed to meet these challenges.

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