Membrane-augmented cryogenic methane/nitrogen separation

Lokhandwala, Kaaeid

Title: Membrane-augmented cryogenic methane/nitrogen separation

Full Record
Other Related Research

Abstract

A membrane separation process combined with a cryogenic separation process for treating a gas stream containing methane, nitrogen and at least one other component. The membrane separation process works by preferentially permeating methane and the other component and rejecting nitrogen. The process is particularly useful in removing components such as water, carbon dioxide or C.sub.3+ hydrocarbons that might otherwise freeze and plug the cryogenic equipment.

Inventors:

Lokhandwala, Kaaeid ^[1]

Menlo Park, CA

Issue Date:: 1997-01-01

Research Org.:: Membrane Technology and Research, Inc. (Menlo Park, CA)

OSTI Identifier:: 871047

Patent Number(s):: 5647227

Application Number:: 08/608707

Assignee:: Membrane Technology and Research, Inc. (Menlo Park, CA)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING 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

Show more

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D53/228 - {characterised by specific membranes}
B01D53/229 - {Integrated processes
B01D69/02 - characterised by their properties
B01D71/24 - Rubbers
B01D71/44 - Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26 - B01D71/42
B01D71/70 - Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only

F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING 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
F25J2205/40 - using hybrid system, i.e. combining cryogenic and non-cryogenic separation techniques
F25J2205/80 - using membrane, i.e. including a permeation step
F25J2220/60 - Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
F25J2220/64 - Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
F25J2220/66 - Separating acid gases, e.g. CO2, SO2, H2S or RSH
F25J2240/12 - the fluid being nitrogen
F25J3/0209 - {Natural gas or substitute natural gas}
F25J3/0233 - {separation of CnHm with 1 carbon atom or more}
F25J3/0242 - {separation of CnHm with 3 carbon atoms or more}
F25J3/0257 - {separation of nitrogen

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S62/927 - Natural gas from nitrogen

Show less

DOE Contract Number:: FG03-94ER81809

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: membrane-augmented; cryogenic; methane; nitrogen; separation; membrane; process; combined; treating; gas; stream; containing; component; preferentially; permeating; rejecting; particularly; useful; removing; components; water; carbon; dioxide; hydrocarbons; otherwise; freeze; plug; equipment; separation process; carbon dioxide; gas stream; particularly useful; stream containing; membrane separation; nitrogen separation; containing methane; rejecting nitrogen; permeating methane; moving components; preferentially permeating; /62/95/96/

Citation Formats


                    Lokhandwala, Kaaeid. Membrane-augmented cryogenic methane/nitrogen separation.  United States: N. p., 1997. 
        Web.

Copy to clipboard


                    Lokhandwala, Kaaeid. Membrane-augmented cryogenic methane/nitrogen separation.  United States.

Copy to clipboard


                    Lokhandwala, Kaaeid. Wed .  
        "Membrane-augmented cryogenic methane/nitrogen separation".  United States.  https://www.osti.gov/servlets/purl/871047.

Copy to clipboard


                    
@article{osti_871047,

  title        = {Membrane-augmented cryogenic methane/nitrogen separation},

  author       = {Lokhandwala, Kaaeid},

  abstractNote = {A membrane separation process combined with a cryogenic separation process for treating a gas stream containing methane, nitrogen and at least one other component. The membrane separation process works by preferentially permeating methane and the other component and rejecting nitrogen. The process is particularly useful in removing components such as water, carbon dioxide or C.sub.3+ hydrocarbons that might otherwise freeze and plug the cryogenic equipment.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1997},

  month        = {1}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Membrane-augmented cryogenic methane/nitrogen separation

Patent Lokhandwala, K

A membrane separation process is described which is combined with a cryogenic separation process for treating a gas stream containing methane, nitrogen and at least one other component. The membrane separation process works by preferentially permeating methane and the other component and rejecting nitrogen. The process is particularly useful in removing components such as water, carbon dioxide or C{sub +2} hydrocarbons that might otherwise freeze and plug the cryogenic equipment. 10 figs.
Membrane augmented distillation to separate solvents from water

Patent Huang, Yu; Baker, Richard W.; Daniels, Rami; ...

Processes for removing water from organic solvents, such as ethanol. The processes include distillation to form a rectified overhead vapor, compression of the rectified vapor, and treatment of the compressed vapor by two sequential membrane separation steps.
Full Text Available
Methods for applying microchannels to separate methane using liquid absorbents, especially ionic liquid absorbents from a mixture comprising methane and nitrogen

Patent Tonkovich, Anna Lee Y [Dublin, OH]; Litt, Robert D [Westerville, OH]; Dongming, Qiu [Dublin, OH]; ...

Methods of using microchannel separation systems including absorbents to improve thermal efficiency and reduce parasitic power loss. Energy is typically added to desorb methane and then energy or heat is removed to absorb methane using a working solution. The working solution or absorbent may comprise an ionic liquid, or other fluids that demonstrate a difference in affinity between methane and nitrogen in a solution.
Full Text Available
Methane/nitrogen separation process

Patent Baker, Richard W [Palo Alto, CA]; Lokhandwala, Kaaeid A [Menlo Park, CA]; Pinnau, Ingo [Palo Alto, CA]; ...

A membrane separation process for treating a gas stream containing methane and nitrogen, for example, natural gas. The separation process works by preferentially permeating methane and rejecting nitrogen. We have found that the process is able to meet natural gas pipeline specifications for nitrogen, with acceptably small methane loss, so long as the membrane can exhibit a methane/nitrogen selectivity of about 4, 5 or more. This selectivity can be achieved with some rubbery and super-glassy membranes at low temperatures. The process can also be used for separating ethylene from nitrogen.
Full Text Available
Process for separating nitrogen from methane using microchannel process technology

Patent Tonkovich, Anna Lee [Marysville, OH]; Qiu, Dongming [Dublin, OH]; Dritz, Terence Andrew [Worthington, OH]; ...

The disclosed invention relates to a process for separating methane or nitrogen from a fluid mixture comprising methane and nitrogen, the process comprising: (A) flowing the fluid mixture into a microchannel separator, the microchannel separator comprising a plurality of process microchannels containing a sorption medium, the fluid mixture being maintained in the microchannel separator until at least part of the methane or nitrogen is sorbed by the sorption medium, and removing non-sorbed parts of the fluid mixture from the microchannel separator; and (B) desorbing the methane or nitrogen from the sorption medium and removing the desorbed methane or nitrogen frommore » « less
Full Text Available

Similar Records