Liquid carbon dioxide injection
A two-stage heating system with a vaporizer and re-liquefaction unit addresses the challenge of maintaining LCO2 in liquid form during transport and sequestration, ensuring efficient carbon sequestration by managing temperature and pressure fluctuations.
WO2026117544A1PCT designated stage Publication Date: 2026-06-04BUMI ARMADA BERHARD +1
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BUMI ARMADA BERHARD
- Filing Date
- 2025-11-25
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Maintaining liquid carbon dioxide (LCO2) in a stable liquid form during transport and sequestration is challenging due to its tendency to boil off as a gas, especially in marine environments where energy is limited and conditions are harsh.
Method used
A two-stage heating system using hot water glycol and a vaporizer maintains the LCO2 at a desired temperature and pressure, combined with a re-liquefaction unit to capture boiled-off gas, ensuring efficient injection into subsurface reservoirs.
Benefits of technology
The system effectively maintains LCO2 as a liquid, optimizing energy efficiency and ensuring consistent injection pressure and temperature, even in marine conditions, thereby enhancing carbon sequestration processes.
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Smart Images
Figure US2025057008_04062026_PF_FP_ABST
Abstract
Liquid Carbon Dioxide (LCO2) injection may be provided by a system including a storage vessel: an injection pump, configured to pump an LCO2 stream to a wellhead in communication with a reservoir: a first heating stage, disposed between the injection pump and the wellhead, configured to heat the LCO2 stream to an intermediate temperature below a target injection temperature; a second heating stage, disposed between the first heating stage and the wellhead, configured to heat the LCO2 stream from the intermediate temperature to the target injection temperature for the subsea reservoir; and a vaporizer, disposed in a header between the storage vessel and the injection pump, to heat a portion of the LCO2 stream into a gaseous state for return to the storage vessel.
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