GB2106623A - Liquifaction and storage of gas - Google Patents

Liquifaction and storage of gas Download PDF

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Publication number
GB2106623A
GB2106623A GB08118964A GB8118964A GB2106623A GB 2106623 A GB2106623 A GB 2106623A GB 08118964 A GB08118964 A GB 08118964A GB 8118964 A GB8118964 A GB 8118964A GB 2106623 A GB2106623 A GB 2106623A
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Prior art keywords
gas
storage
species
expansion
remains
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GB08118964A
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GB2106623B (en
Inventor
Jerzy Wrobel
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British Gas Corp
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British Gas Corp
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/0087—Propane; Propylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0208—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle in combination with an internal quasi-closed refrigeration loop, e.g. with deep flash recycle loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0254—Operation; Control and regulation; Instrumentation controlling particular process parameter, e.g. pressure, temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/62—Separating low boiling components, e.g. He, H2, N2, Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/44—Particular materials used, e.g. copper, steel or alloys thereof or surface treatments used, e.g. enhanced surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/60—Details about pipelines, i.e. network, for feed or product distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

Gas associated with off-shore oil production normally comprises mixtures having at least two different hydrocarbon species, the first being soluble in the second. In the recovery of such gas, said mixture is cleansed and subjected to a first compression and thereafter subjected to dehydration, refrigeration and expansion into a storage means at a point remote from said cleansing and first compression stage, said expansion being selected such that a proportion of said refrigerated gas remains in the gaseous phase and the remainder in in the liquid phase and wherein the storage pressure of the expanded gas is selected such that said first hydrocarbon species remains in solution in said second species. <IMAGE>

Description

SPECIFICATION Liquifaction and storage of associated gas This invention relates to the liquifaction of hydrocarbon gases and more particularly to the recovery of gas associated with off-shore oil production.
At present, associated gas is almost invariably flared since no means were known to economically bring the gas ashore. Current proposals are in hand to build a pipeline gathering system in the North Sea into which gases from individual oil producing fields would be fed in and brought on shore.
No doubt, when considering potentially large fields with high and well defined production profiles, this represents the best and perhaps the only solution.
But, the situation in the North Sea is never static, fields' reserves are constantly being up an degraded, new discoveries are taking place and due to the ever increasing cost of oil, smaller and smaller marginal fields are becoming viable for exploitation.
Connection of the new sources of gas into the existing gathering line system may be very costly if at all possible, and laying new gathering lines prohibitively expense especially for small and dispersed smaller fields. In consequence, the existing oil producing fields not embraced by the proposed gathering line and all the future discoveries will have to flare the gases if they want to produce oil; and if they cannot reinjectthem, limits may be imposed on the oil production.
The present invention seeks to provide a more universal and flexible method for recovering gases which would otherwise have to be flared.
The present invention provides a process and apparatus therefor, for the iiquifaction and storage of normally gaseous hydrocarbon mixtures comprising at least two different hydrocarbon species, the first being soluble in the second wherein said mixture is cleansed and subjected to a first compression and thereafter subjecting the gas to dehydration, refrigeration and expansion into a storage means at a point remote from said cleansing and first compression stage said expansion being selected such that a proportion of said refrigerated gas remains in the gaseous phase and the remainder in in the liquid phase and wherein the storage pressure of the expanded gas is selected and that said first hydrocarbon species remains in solution in said second species.
In a preferred embodiment the dehydrated gas is subjected to a further compression stage prior to refrigeration, depending on the quality and quantity of the gaseous mixture being processed.
The power used to pump and regenerate the dessicant as well as provide the refrigerant and optionally the second compressor stage is derived from that portion of gas which does not undergo liquifaction. This gas may be recovered either by bleeding from the storage means or directly from the point where the expansion takes place.
The invention will be further described with reference to the accompaying drawings and example wherein for ease of understanding methane and ethane are the solubilised species and hydrocarbons from propane and greater molecular weight and the solubility species.
Referring to the drawings, Figure 1 is a schematic diagram of apparatus suitable for carrying out the process of the invention. Figure 2 is a graph showing the liquifaction pressure-temperature curve for a typical associated gas, assuming 90% methane recovery.
The overall diagramatic representation of the proposed scheme is shown in Figure 1. It can be split in three well defined sections: 1. This section comprises a compressor and an acid gas removal dehydration plant. This equipment is situated on the production platform and receives the gases from the crude oil production separators, and after compression and treatment feeds them into the undersea line.
2. The undersea line, seldom largerthan 6 in. dia.
pipe would be required; available of the reel, easy and cheap to lay.
The pipeline takes the gas from the production platform to a single point mooring (SPM) where it is connected to a riser and a loading buoy.
3. All the equipment required consists of: (a) solid adsorbent dehydration plant (two colums alternatively used).
(b) compressor (optionally) (c) cooler (d) propane refrigeration plant (e) expander (f) storage tanks The gas from the undersea line is dehydrated, compressed to a required pressure, if necessary, cooled and refrigerated to such an extent, that after expansion it is almost completely liquified at the storage tanks pressure.
The storage pressure will be adjusted to such a value at which the required amount of methane and ethane will dissolve in the predominantly propane and butanes liquid.
The temperature and pressure at which the storage tanks will have to operated will depend on the composition of the flared gases; and for a typical case the temperature is not expected to go below about -1 00 C and pressure above 300 spig so that 3.5% Ni steel can be used in the storage tank construction. The minimum temperature coinciding with minimum presure and vice versa.
It will not be necessary to dissolve all the methane present, as some of it will be required for the main compressor drive as well as propane compressor drive and dehydration column regenertion and final ship requirements. The tanker will perhaps load on the cargo for a week ortho depending on the production rates, and size of the tanker, and then either change places with another empty tanker similarly equipped, or stay on station permanently and have the cargo transferred ashore by one or more shuttle tankers, which could be much smaller vessels than process tankers and would not have to carry any process plant; only the pressure storage tanks.
The advantages of the above outlined proposal are considerable: The capital investiment is relatively low, and of that the proportion of capital which is tied to a given production field is even lower, as it represents only the undersea line and the SPM. The rest is situated on the tabker representing the major part of the investment, but the tanker, of course, can be used anywhere.
A typical composition of the falred gas was assumed to be: CH4-60% C2H6- 17% C3H8- 15% C4H10-6% C5H12- 1.6% C6H14- 0.3 C7H16+ - 0.1 This corresponds to dead crude production where most lighter hydrocarbons have to be removed from the crude. M.wt. of the separated gas approx. 25-26.
It is further assumed that the gas of the above composition, after purification and dehydration is compressed to a pressure in the range 750-1000 spia and is delivered to the tanker at (sea temperature) where after further dehydration it is cooled in a propane refrigeration plant down to -80 C.
At this point it is almost all liquid state. The fluid is then explanded through a throttling valve down to the final storage pressure, which is assumed here to be of the order of 350 psia, and cooled down to just above -90"C.
Under these conditions about 90% of methane and practically 100% of higher hydrocarbons will appear in a liquid phase and thus be recovered.
In the cases where gases of lower molecular weight are produced, or indeed in order to alleviate the conditions of temperature and/or pressure in the previous case, certain amounts of C3+ fraction could be left in the storage tanks on unloading predominantly methane/ethane fraction, and used as a solvent for the lighter hydrocarbons.
In Graph 1, the top curve refers to 100% feed being handled, while the lower curve refers to a case when about 25% of storage is filled with C3+ fraction.
It is seen that in order to recover 90+% of methane and practically total amounts of heavier hydrocarbons, for instance at -97 C pressure in the storage vessel required will be about 300 psia, when 100% feed is used; at lower pressures, lower temperatures and vice versa will be required.
When the storage vessel contains certain propor tions of C3+ liquid, 25% then the corresponding conditions will be about -87 C at 300 psia, or 250 psia at the unchanged temperature of -97 C.
Larger proportions of C3+ fraction in the storage vessel will further alleviate the storage conditions of temperature and pressure for a given methane recovery.

Claims (1)

  1. CLAIM
    1. Processforthe liquifaction and storage of normal gaseous hydrocarbon mixtures comprising at least two different hydrocarbon species, the first being soluble in the second, which process comprises cleansing said mixture and subjecting itto a first compression, thereafter subjecting the mixture to hydration, refrigeration and expansion into a storage means at a point remote from where said cleansing and said first compression stages are effected, said expansion being selected such that a proportion of the refrigerated gas remains in the gaseous phase and the reaminder is in liquid phase and wherein the storage pressure of the expanded gas is selected such that said first hydrocarbon species remains in solution in said second species.
GB08118964A 1981-06-19 1981-06-19 Liquifaction and storage of gas Expired GB2106623B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08118964A GB2106623B (en) 1981-06-19 1981-06-19 Liquifaction and storage of gas

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Application Number Priority Date Filing Date Title
GB08118964A GB2106623B (en) 1981-06-19 1981-06-19 Liquifaction and storage of gas

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GB2106623A true GB2106623A (en) 1983-04-13
GB2106623B GB2106623B (en) 1984-11-07

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0993585A1 (en) * 1997-07-01 2000-04-19 Exxon Production Research Company Process for liquefying a natural gas stream containing at least one freezable component
EP1019560A1 (en) * 1997-06-20 2000-07-19 Exxon Mobil Upstream Research Company Improved system for processing, storing, and transporting liquefied natural gas
EP1021689A2 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Improved process for liquefaction of natural gas
EP1021690A1 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Improved cascade refrigeration process for liquefaction of natural gas
EP1021675A2 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Systems for vehicular, land-based distribution of liquefied natural gas
EP1248935A1 (en) * 1999-12-17 2002-10-16 ExxonMobil Upstream Research Company Process for liquefying natural gas by expansion cooling
WO2008006788A2 (en) * 2006-07-13 2008-01-17 Shell Internationale Research Maatschappij B.V. Method and apparatus for liquefying a hydrocarbon stream
FR2928719A1 (en) * 2008-03-11 2009-09-18 Total Sa Sa Liquefied natural gas producing method for power plant, involves transporting processed natural gas until offshore installation, cooling and liquefying gas in offshore installation, and storing liquefied natural gas in offshore installation
WO2010010406A2 (en) * 2008-07-25 2010-01-28 Dps Bristol (Holdings) Ltd Production of liquefied natural gas
CN103017480A (en) * 2012-12-07 2013-04-03 中国科学院理化技术研究所 Liquefaction system for producing LNG (liquefied Natural gas) by utilizing pressure energy of pipeline

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105674057A (en) * 2016-01-28 2016-06-15 侯奕 Natural gas pressure difference energy recovery and liquid oxygen generation integrated system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1019560A4 (en) * 1997-06-20 2006-03-22 Exxonmobil Upstream Res Co Improved system for processing, storing, and transporting liquefied natural gas
EP1021675A4 (en) * 1997-06-20 2005-08-17 Exxonmobil Upstream Res Co Systems for vehicular, land-based distribution of liquefied natural gas
EP1021690A1 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Improved cascade refrigeration process for liquefaction of natural gas
EP1021675A2 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Systems for vehicular, land-based distribution of liquefied natural gas
EP1019560A1 (en) * 1997-06-20 2000-07-19 Exxon Mobil Upstream Research Company Improved system for processing, storing, and transporting liquefied natural gas
EP1021689A2 (en) * 1997-06-20 2000-07-26 Exxon Mobil Upstream Research Company Improved process for liquefaction of natural gas
EP0993585A1 (en) * 1997-07-01 2000-04-19 Exxon Production Research Company Process for liquefying a natural gas stream containing at least one freezable component
EP1248935A1 (en) * 1999-12-17 2002-10-16 ExxonMobil Upstream Research Company Process for liquefying natural gas by expansion cooling
EP1248935A4 (en) * 1999-12-17 2004-12-01 Exxonmobil Upstream Res Co Process for liquefying natural gas by expansion cooling
WO2008006842A2 (en) * 2006-07-13 2008-01-17 Shell Internationale Research Maatschappij B.V. Method and apparatus for liquefying a natural gas stream
WO2008006788A3 (en) * 2006-07-13 2008-10-30 Shell Int Research Method and apparatus for liquefying a hydrocarbon stream
WO2008006842A3 (en) * 2006-07-13 2008-11-27 Shell Int Research Method and apparatus for liquefying a natural gas stream
WO2008006788A2 (en) * 2006-07-13 2008-01-17 Shell Internationale Research Maatschappij B.V. Method and apparatus for liquefying a hydrocarbon stream
FR2928719A1 (en) * 2008-03-11 2009-09-18 Total Sa Sa Liquefied natural gas producing method for power plant, involves transporting processed natural gas until offshore installation, cooling and liquefying gas in offshore installation, and storing liquefied natural gas in offshore installation
WO2010010406A2 (en) * 2008-07-25 2010-01-28 Dps Bristol (Holdings) Ltd Production of liquefied natural gas
WO2010010406A3 (en) * 2008-07-25 2012-02-16 Dps Bristol (Holdings) Ltd Production of liquefied natural gas
CN103017480B (en) * 2012-12-07 2015-05-06 中国科学院理化技术研究所 Liquefaction system for producing LNG (liquefied Natural gas) by utilizing pressure energy of pipeline
CN103017480A (en) * 2012-12-07 2013-04-03 中国科学院理化技术研究所 Liquefaction system for producing LNG (liquefied Natural gas) by utilizing pressure energy of pipeline

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