Energy efficient non-flammable refrigeration for co2-rich process streams
A HFO/CO2 refrigerant mixture with staged flashing optimizes refrigerant concentration and reduces seal leakage, addressing flammability and inefficiency in cryogenic carbon dioxide capture, achieving efficient and safe refrigeration.
US20260177314A1Pending Publication Date: 2026-06-25UOP LLC
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- UOP LLC
- Filing Date
- 2025-10-14
- Publication Date
- 2026-06-25
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Figure US20260177314A1-D00000_ABST
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.
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