公开(公告)号：US11927391B2

公开(公告)日：2024-03-12

申请号：US17647540

申请日：2022-01-10

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Robert D. Kaminsky ,  Marcel Staedter

IPC: F25J1/00 ,  F25J1/02 ,  F25J3/02

CPC classification number: F25J1/0022 ,  F25J1/0032 ,  F25J1/005 ,  F25J1/007 ,  F25J1/008 ,  F25J1/0254 ,  F25J3/0214 ,  F25J2210/06 ,  F25J2210/60 ,  F25J2215/04 ,  F25J2220/66 ,  F25J2260/02 ,  F25J2270/04 ,  F25J2270/14

Abstract: A method and apparatus for liquefying a feed gas stream comprising natural gas and carbon dioxide. A method includes compressing an input fluid stream to generate a first intermediary fluid stream; cooling the first intermediary fluid stream with a first heat exchanger to generate a second intermediary fluid stream, wherein a temperature of the second intermediary fluid stream is higher than a carbon dioxide-freezing temperature for the second intermediary fluid stream; expanding the second intermediary fluid stream to generate a third intermediary fluid stream, wherein the third intermediary fluid stream comprises solid carbon dioxide; separating the third intermediary fluid stream into a fourth intermediary fluid stream and an output fluid stream, wherein the output fluid stream comprises a liquefied natural gas (LNG) liquid; and utilizing the fourth intermediary fluid stream as a cooling fluid stream for the first heat exchanger.