公开(公告)号：US12111102B2

公开(公告)日：2024-10-08

申请号：US18054635

申请日：2022-11-11

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Paul Davies ,  James Lee Harris, Jr. ,  Emery Jay Thomas ,  Gregg Sapp

IPC: F25J1/00 ,  C09K5/04 ,  F25J1/02

CPC classification number: F25J1/0022 ,  C09K5/042 ,  C09K5/045 ,  F25J1/0062 ,  F25J1/0097 ,  F25J1/0256 ,  F25J1/0278 ,  C09K2205/126

Abstract: Methods and systems for liquefying natural gas using environmentally-friendly low combustibility refrigerants are provided. Methods of liquefaction include cooling a fluid in an LNG facility via indirect heat exchange with an environmentally-friendly low combustibility refrigerants that are propane, ethane and methane mixed with small amounts of fluorinated olefin, but still within close proximity to the boiling points of the pure refrigerants such that the mixed refrigerants can still be used in an optimized cascade process.