公开(公告)号：WO2023069139A1

公开(公告)日：2023-04-27

申请号：PCT/US2022/024328

申请日：2022-04-12

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： HOWARD, Henry, Edward

IPC: F25J1/00

Abstract: A small to mid-scale liquefied natural gas production system and method is provided. The disclosed liquefied natural gas production system employs at least one heat exchanger, three turbine/ expanders and at least three refrigerant compression stages. The expansion ratio of one turbine/ expander is appreciably lower than the expansion ratio of the other turbine/ expanders such that the temperature of the exhaust stream from the turbine/ expander with the lower expansion ratio is above the critical point temperature of the compressed natural gas containing feed stream but colder than about -15° C. The present system and method may be configured using either a single nitrogen-based expansion refrigerant circuit or two separate refrigerant circuits wherein the turbine/ expander with the lowest expansion ratio is contained within a separate refrigeration circuit from the other two turbine/ expanders with the higher expansion ratios.

公开(公告)号：WO2023063992A1

公开(公告)日：2023-04-20

申请号：PCT/US2022/024325

申请日：2022-04-20

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： HOWARD, Henry, Edward ,  RAUCH, Jeremiah, J.

IPC: F25J1/00

Abstract: A small to mid-scale liquefied natural gas production system and method is provided. The disclosed liquefied natural gas production system employs a nitrogen-based refrigerant, at least one heat exchanger, three turbine/expanders and two or more refrigerant compression stages. The expansion ratio of one turbine/expander is appreciably lower than the expansion ratio of the other turbine/expanders such that the temperature of the exhaust stream from the turbine/expander with the lower expansion ratio is above the critical point temperature of the compressed natural gas feed stream but colder than -15° C.

公开(公告)号：WO2023022741A1

公开(公告)日：2023-02-23

申请号：PCT/US2021/054351

申请日：2021-10-11

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： PROSSER, Neil, M.

IPC: F25J3/04

Abstract: A nitrogen producing cryogenic air separation unit with an excess air circuit is provided. The nitrogen producing cryogenic air separation unit is capable of producing high pressure gaseous nitrogen without the use of a nitrogen product compressors and is also capable of producing high rates of liquid nitrogen without adding additional compression stages in the main air compressor and/or without a nitrogen recycle compressor.

公开(公告)号：WO2023018429A1

公开(公告)日：2023-02-16

申请号：PCT/US2021/054349

申请日：2021-10-11

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： XU, Zhengrong ,  PROSSER, Neil M.

IPC: F25J3/04

Abstract: A system and method for improving the performance of an oxygen, nitrogen, and argon producing air separation unit configured to produce a gaseous nitrogen product stream is provided. By recycling the argon condenser boil-off vapor stream to the main air compression train, the argon recovery and oxygen recovery while maintaining the production level of a medium or high pressure gaseous nitrogen product stream. In addition, some operational cost savings in terms of lower power costs can also be realized compared to some prior art oxygen, nitrogen, and argon producing air separation units.

公开(公告)号：WO2022159187A1

公开(公告)日：2022-07-28

申请号：PCT/US2021/062305

申请日：2021-12-08

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： DAMSTEDT, Bradley, D. ,  BOOL, Lawrence, E.

IPC: C10J3/46 ,  C10J3/84 ,  C10K3/06 ,  C01B3/36

Abstract: Disclosed is methodology for controlling the H2:CO ratio of the product produced in a partial oxidation reactor, by adjusting the properties of the product formed in the partial oxidation.

公开(公告)号：WO2022066549A1

公开(公告)日：2022-03-31

申请号：PCT/US2021/051018

申请日：2021-09-20

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： KRISHNAMURTHY, Ramachandran ,  BYRON, Makini

IPC: C25B1/04 ,  C25B15/08 ,  B01D53/14 ,  F01K23/06 ,  F23J15/04 ,  G06Q50/06 ,  H02J3/14 ,  H02J15/00

Abstract: The present invention relates to an integrated process that enables cost- effective low carbon power production for natural gas combined cycle (NGCC) power plants utilizing the Linde-BASF advanced amine carbon capture technology and hydrogen technologies. The present invention is a flexible carbon capture and storage (FLECCS) system incorporating the NGCC, a post combustion capture (PCC) plant, a proton exchange membrane (PEM) electrolyzer, hydrogen compression and storage tanks.

公开(公告)号：WO2022039840A1

公开(公告)日：2022-02-24

申请号：PCT/US2021/039761

申请日：2021-06-30

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： MANCINI, Ralph, J. ,  CELIK, Cem, E. ,  GRAHL, Matthias ,  SELOVER, Arthur, C. ,  VEMURI, Sesha, Hari ,  SCHNEIDER, Helko

IPC: B01D53/04 ,  B01D53/047 ,  B01D53/86

Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.

公开(公告)号：WO2021230913A1

公开(公告)日：2021-11-18

申请号：PCT/US2020/064536

申请日：2020-12-11

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： KROMER, Brian R. ,  PROSSER, Neil M. ,  HANDLEY, James R. ,  XU, Zhengrong ,  HOWARD, Henry E.

IPC: F25J3/04

Abstract: Enhancements to the distillation column system and cycles for an argon and nitrogen producing cryogenic air separation unit are provided. The enhancements include systems and methods for: (i) recovery of xenon and krypton; (ii) production of oxygen product substantially free of hydrocarbons; and (iii) improvement in the design and performance of the super-stage argon column. The present systems and methods are further characterized in an oxygen enriched stream from the lower pressure column of the air separation unit is an oxygen enriched condensing medium used in the argon condenser.

公开(公告)号：WO2021126513A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/062665

申请日：2020-12-01

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： PROSSER, Neil, M. ,  HANDLEY, James, R. ,  DE CASTRO COSTA, Ricardo, Dutra ,  BILLINGHAM, John, F. ,  PARSNICK, David, R.

IPC: F25B9/00 ,  F25B9/06 ,  F25J1/00 ,  F25B9/002 ,  F25B9/004 ,  F25J1/0012 ,  F25J1/0015 ,  F25J1/0037 ,  F25J1/004 ,  F25J1/0042 ,  F25J1/0045 ,  F25J1/005 ,  F25J1/0052 ,  F25J1/0057 ,  F25J1/007 ,  F25J1/0072 ,  F25J1/0202 ,  F25J1/0204 ,  F25J1/0236 ,  F25J1/0249 ,  F25J1/0265 ,  F25J1/0288 ,  F25J1/0292 ,  F25J1/0294 ,  F25J2220/02 ,  F25J2230/30 ,  F25J2270/06 ,  F25J2270/16

Abstract: Various systems and methods for suppling cryogenic refrigeration to supercomputing applications such as quantum computing operations are provided. The disclosed systems and methods are flexible, efficient and scaleable to meet the cryogenic refrigeration requirements of many supercomputing applications. The disclosed systems and methods include: (i) a liquid nitrogen based integrated refrigeration system that integrates a nitrogen refrigerator with a refrigeration load circuit; (ii) a closed loop liquid nitrogen based refrigerator that provides cooling to the refrigeration load circuit via indirect heat exchange between liquid nitrogen in a nitrogen refrigerator and a separate refrigerant in a closed-loop refrigeration load circuit; and (iii) a liquid air based integrated refrigeration system that integrates an air intake system with a refrigerator and a refrigeration load circuit.

公开(公告)号：WO2021118685A1

公开(公告)日：2021-06-17

申请号：PCT/US2020/055717

申请日：2020-10-15

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： WARTA, Andrew, M.

IPC: C01B3/50 ,  F25J3/02 ,  F25J3/06

Abstract: The present invention is directed to a method of separating carbon monoxide from syngas mixtures by cryogenic means where a partial condensation cycle is generally employed, and more specifically varying refrigeration generation based on income feed composition of the hydrocarbon feedstock being processed.