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US20110048296A1 - Process for using a facility for combusting carbonaceous materials - Google Patents

Process for using a facility for combusting carbonaceous materials Download PDF

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Publication number
US20110048296A1
US20110048296A1 US12/936,767 US93676709A US2011048296A1 US 20110048296 A1 US20110048296 A1 US 20110048296A1 US 93676709 A US93676709 A US 93676709A US 2011048296 A1 US2011048296 A1 US 2011048296A1
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US
United States
Prior art keywords
reactor
oxides
oxide
facility
oxygen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/936,767
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English (en)
Inventor
Laurent MAGHDISSIAN
Jean-Claude Semedard
Antony Piton
Corinne Beal
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GE Vernova GmbH
Original Assignee
Alstom Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of US20110048296A1 publication Critical patent/US20110048296A1/en
Assigned to ALSTOM TECHNOLOY, LTD. reassignment ALSTOM TECHNOLOY, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEAL, CORINNE, MAGHDISSIAN, LAURENT, PITON, ANTHONY, SEMEDARD, JEAN-CLAUDE
Assigned to ALSTOM TECHNOLOGY LTD reassignment ALSTOM TECHNOLOGY LTD CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME AND STREET ADDRESS PREVIOUSLY RECORDED ON REEL 026277 FRAME 0387. ASSIGNOR(S) HEREBY CONFIRMS THE FROM "ALSTOM TECHNOLOY, LTD." TO "ALSTOM TECHNOLOGY LTD" AND FROM "BROWN SOVERI STASSE 7" TO "BROWN BOVERI STRASSE 7". Assignors: BEAL, CORINNE, MAGHDISSIAN, LAURENT, PITON, ANTHONY, SEMEDARD, JEAN-CLAUDE
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/002—Fluidised bed combustion apparatus for pulverulent solid fuel
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
    • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
    • C01B3/344—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using non-catalytic solid particles
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/025—Processes for making hydrogen or synthesis gas containing a partial oxidation step
    • C01B2203/0255—Processes for making hydrogen or synthesis gas containing a partial oxidation step containing a non-catalytic partial oxidation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2206/00—Fluidised bed combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/99008—Unmixed combustion, i.e. without direct mixing of oxygen gas and fuel, but using the oxygen from a metal oxide, e.g. FeO
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention relates to a process for using a facility for burning carbonaceous materials, in order to produce electricity and/or steam.
  • the carbonaceous materials can be fossil fuels such as coal, for example, waste or biomass, and they are injected into a combustion chamber, for example a fluidized bed combustion chamber.
  • Such a facility for burning carbonaceous materials is described in patent document FR 2 850 156.
  • This facility includes a reactor for reducing oxides, a first cyclone, a reactor for oxidizing oxides, a second cyclone, exchangers for controlling the temperature of the circulating oxides and exchangers for flue gas heat recovery.
  • the facility circulate oxides which are reduced and then oxidized in the two reactors.
  • the solid fuel material is grounded before entering the oxide reduction reactor, and in the case of coal the average particle diameter is less than 500 ⁇ m.
  • the oxides are reduced by having them in contact with the fuel which reacts with the oxygen released by the oxides and are then oxidized by contact with air which regenerates the oxides.
  • the oxides have a particle size range from 50 to 500 ⁇ m and a density from 2000 to 7000 kg/m 3 .
  • This type of facility for combustion of carbonaceous solid materials assures, because of the simplicity and the compactness of this system, reduced costs of capturing carbon dioxide while providing production of steam for generating electricity.
  • the solid particles at the outlet of the first cyclone associated with the reduction reactor consisting of oxides particles and of carbonaceous residues, pass through a seal pot and are then directed towards a device for removing the carbonaceous residues.
  • This removal device is fluidized by steam. With this fluidization, the fine and light particles such as the carbonaceous residues may be separated and re-introduced into the reduction reactor, while the denser and larger oxide particles are transferred towards the oxidation reactor.
  • This removal device is a separator forming a carbon barrier in the facility, essential for capturing carbon dioxide which is a greenhouse gas which should be subjected to emission restrictions.
  • said chemical loopings rely on providing oxygen in solid form by oxides which are oxygen carrier, in order to convert a fuel which can be a gas or a solid fuel. They can be used for combustion with solid, gaseous or liquid fuels or for gasification for production of hydrogen or synthetic gas.
  • reaction of conversion of the fuel can be endothermic.
  • MeO being oxide, for example metal oxide.
  • the temperature of the reactor In order to avoid the stop of the reaction, the temperature of the reactor must be maintained at a certain level.
  • the current way to control the temperature is to introduce in the reactor for oxides reduction solids coming from the reactor for oxides oxidation which is operating at a higher temperature or to add some inert solids mixed within the oxygen carrier if the quantity of oxides which can be injected is limited, as in gasification case, and thus provide the required heat.
  • the object of the invention is to improve such facility in order that the temperature is controlled without necessity of facility with great size.
  • the invention relates to a process for using a facility comprising a first reactor for reducing oxides in which enter a fuel material and metal oxide for providing a reaction of combustion of the fuel material, the first reactor being connected to a second reactor for oxidizing oxide.
  • additional oxygen in a gaseous form is injected into the said first reactor for reducing oxide and the additional oxygen quantity is comprised between 10 and 30% relatively to stoichiometric oxygen for full fuel material combustion.
  • the required solid flow is reduced thanks that part of the carbonaceous material is oxidized by gaseous oxygen in an exothermic reaction. It leads to a smaller reactor.
  • the invention assures an increasing of the residence time of fuel inside the reactor and thus a better carbon conversion rate.
  • the said additional oxygen quantity is controlled, in order to control the temperature of the said first reactor for reducing oxide.
  • a short term response back up can be made by additional oxygen providing quickly heat to recover the required temperature.
  • the additional oxygen is mixed with a media of fluidization before entering the said first reactor for reducing oxide.
  • Fuel material can be coal.
  • Said media of fluidization can be steam and eventually recycled flue gas.
  • FIGURE which only illustrates a preferred embodiment of the invention.
  • FIG. 1 is a schematic view of a facility used in the process according to the invention.
  • a facility for combusting carbonaceous solid materials, in order to produce electricity and/or steam, in which circulates at least one oxide, preferably a mixture of oxides, advantageously metal oxides, which is reduced and then oxidized includes a first reactor 1 for reducing oxides in which enter a fuel material E 1 , for example grounded coal, and oxides E 2 , a first separation cyclone 20 fed with entrained solids from this reactor 1 for reducing oxides, a carbon separator 3 installed at the outlet of this first cyclone 20 in order to send the carbonaceous particles into the reactor 1 for reducing oxides and the oxides E 2 into a second reactor 4 for oxidizing oxides fluidized by air 13 and a second separation cyclone 5 fed with entrained solids from the reactor 1 for oxidizing oxides.
  • a first reactor 1 for reducing oxides in which enter a fuel material E 1 , for example grounded coal, and oxides E 2
  • the facility comprises two back pass 11 , 12 , containing recovery exchangers for the flue gases and for the air, each being dedicated to one of the reactors 1 , 4 .
  • the reactor 1 for reducing oxides is fluidized by a mixture A 1 of steam and recycled flue gas.
  • the separation of the carbonaceous residues from the metal oxides is obtained conventionally by the arrangement of cyclone 20 , seal pot 8 and finally solid separator 3 .
  • the solid oxides particles extracted from the bottom of the second cyclone 5 enter a seal pot 9 from which a first portion is transferred to the bottom of the second reactor 4 for oxidizing oxides, a second portion is re-circulated to the bottom of the first reactor 1 for reducing oxides and a third portion is sent to an external bed 7 fluidized by air where heat exchangers are implemented, and finally sent to the second reactor 4 for oxidizing oxides.
  • This facility is of the type of the known facility described in patent document FR 2 850 156.
  • Additional oxygen O in a gaseous form is injected into the first reactor 1 for reducing oxide and the material E 2 quantity entering into the first reactor 1 for reducing oxide is controlled, in order to obtain a reaction of conversion of the fuel material in thermal equilibrium.
  • the additional oxygen O quantity is comprised between about 10 and 30% relatively to stoichiometric oxygen for full fuel material E 1 combustion.
  • This oxygen quantity depends on the used oxides and their enthalpy of reaction, transport capacity and heat capacity.
  • the additional oxygen O quantity is equal to about 10% relatively to stoechiometric oxygen.
  • the heat quantity is obtained by means of additional oxygen O by chemical reaction
  • the flow of oxides can be divided by 1.5 to 2, by means of the invention.
  • the oxide material can contain inert products for supporting oxides.
  • the required air separation unit for production of oxygen can be 20% of the size in comparison with a conventional air separation unit in a reactor functioning with only oxygen in a gaseous form. It depends of the rate of additional oxygen injected in a gaseous form. The energy penalty due to the air separation unit is decreased by 5.
  • Additional oxygen O is mixed with the media of fluidization, which is a mixture A 1 of steam and recycled flue gas, before entering the first reactor 1 for reducing oxide. Additional oxygen O is introduced into a wind box 1 A of the first reactor 1 for reducing oxide.
  • the oxygen O can be provided with a dedicated oxygen production or by a mixture containing oxygen in gaseous form.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Air Supply (AREA)
US12/936,767 2008-05-23 2009-05-15 Process for using a facility for combusting carbonaceous materials Abandoned US20110048296A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08305194A EP2123978A1 (fr) 2008-05-23 2008-05-23 Processus d'utilisation d'une installation pour la combustion de matériaux carbonés et installation associée
EP08305194.6 2008-05-23
PCT/EP2009/055935 WO2009141281A1 (fr) 2008-05-23 2009-05-15 Processus d’utilisation d’une installation pour la combustion de matériaux carbonés

Publications (1)

Publication Number Publication Date
US20110048296A1 true US20110048296A1 (en) 2011-03-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/936,767 Abandoned US20110048296A1 (en) 2008-05-23 2009-05-15 Process for using a facility for combusting carbonaceous materials

Country Status (7)

Country Link
US (1) US20110048296A1 (fr)
EP (1) EP2123978A1 (fr)
JP (1) JP2011521197A (fr)
CN (2) CN104006383A (fr)
AU (1) AU2009249749B2 (fr)
CA (1) CA2721101C (fr)
WO (1) WO2009141281A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013062801A1 (fr) * 2011-10-26 2013-05-02 Rentech, Inc. Conception de pot-tampon
WO2013062800A1 (fr) * 2011-10-26 2013-05-02 Rentech, Inc. Fluidisation de gazéifieur
US20140065559A1 (en) * 2012-09-06 2014-03-06 Alstom Technology Ltd. Pressurized oxy-combustion power boiler and power plant and method of operating the same
US20140295359A1 (en) * 2011-09-20 2014-10-02 Thierry Gauthier Chemical-looping combustion method with ashes and fines removal in the reduction zone and plant using same
US9765961B2 (en) 2015-03-17 2017-09-19 Saudi Arabian Oil Company Chemical looping combustion process with multiple fuel reaction zones and gravity feed of oxidized particles
US10006632B2 (en) 2012-03-30 2018-06-26 General Electric Technology Gmbh Methods and apparatus for oxidation of unburnts
US10222060B2 (en) * 2016-02-16 2019-03-05 Thermochem Recovery International, Inc. Two-stage energy-integrated product gas generation system and method
US10766059B2 (en) 2016-03-25 2020-09-08 Thermochem Recovery International, Inc. System and method for recovering inert feedstock contaminants from municipal solid waste during gasification
US10800655B2 (en) 2011-09-27 2020-10-13 Thermochem Recovery International, Inc. Conditioned syngas composition, method of making same and method of processing same to produce fuels and/or fischer-tropsch products
US11370982B2 (en) 2016-08-30 2022-06-28 Thermochem Recovery International, Inc. Method of producing liquid fuel from carbonaceous feedstock through gasification and recycling of downstream products
US12187969B2 (en) 2020-03-10 2025-01-07 Thermochem Recovery International, Inc. System and method for liquid fuel production from carbonaceous materials using recycled conditioned syngas

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2515037A1 (fr) * 2011-04-21 2012-10-24 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO Combustion en boucle chimique de lit fixe
CN102878552B (zh) * 2012-07-06 2015-04-15 华北电力大学 一种基于磁性载氧体的固体燃料化学链燃烧系统及工艺

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US20030035770A1 (en) * 2001-08-14 2003-02-20 Cole Jerald A. Process for separating synthesis gas into fuel cell quality hydrogen and sequestration ready carbon dioxide
US20030150365A1 (en) * 2002-02-11 2003-08-14 Alstom (Switzerland) Ltd Sorbent conditioning and direct feed apparatus for a steam generator and a method for retrofitting a steam generator with same
US20030202912A1 (en) * 2002-04-26 2003-10-30 Foster Wheeler Energia Oy Grid construction for a fluidized bed reactor and a method of removing coarse material from a fluidized bed reactor
US6685754B2 (en) * 2001-03-06 2004-02-03 Alchemix Corporation Method for the production of hydrogen-containing gaseous mixtures
US20050175533A1 (en) * 2003-12-11 2005-08-11 Thomas Theodore J. Combustion looping using composite oxygen carriers
US20060130719A1 (en) * 2003-01-16 2006-06-22 Jean-Xavier Morin Combustion installation with co2 recovery
US20090000194A1 (en) * 2006-01-12 2009-01-01 Liang-Shih Fan Systems and Methods of Converting Fuel

Family Cites Families (2)

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JP2573046B2 (ja) * 1988-11-29 1997-01-16 株式会社荏原製作所 流動層ガス化方法及び流動層ガス化炉
DE112007000518A5 (de) * 2006-03-16 2009-01-22 Alstom Technology Ltd. Anlage zur Erzeugung von Elektrizität

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6685754B2 (en) * 2001-03-06 2004-02-03 Alchemix Corporation Method for the production of hydrogen-containing gaseous mixtures
US20030035770A1 (en) * 2001-08-14 2003-02-20 Cole Jerald A. Process for separating synthesis gas into fuel cell quality hydrogen and sequestration ready carbon dioxide
US20030150365A1 (en) * 2002-02-11 2003-08-14 Alstom (Switzerland) Ltd Sorbent conditioning and direct feed apparatus for a steam generator and a method for retrofitting a steam generator with same
US20030202912A1 (en) * 2002-04-26 2003-10-30 Foster Wheeler Energia Oy Grid construction for a fluidized bed reactor and a method of removing coarse material from a fluidized bed reactor
US20060130719A1 (en) * 2003-01-16 2006-06-22 Jean-Xavier Morin Combustion installation with co2 recovery
US20090199749A1 (en) * 2003-01-16 2009-08-13 Alstom Technology Ltd Combustion installation with co2 recovery
US20050175533A1 (en) * 2003-12-11 2005-08-11 Thomas Theodore J. Combustion looping using composite oxygen carriers
US20090000194A1 (en) * 2006-01-12 2009-01-01 Liang-Shih Fan Systems and Methods of Converting Fuel

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140295359A1 (en) * 2011-09-20 2014-10-02 Thierry Gauthier Chemical-looping combustion method with ashes and fines removal in the reduction zone and plant using same
US9726369B2 (en) * 2011-09-20 2017-08-08 Total Sa Chemical-looping combustion method with ashes and fines removal in the reduction zone and plant using same
US12077435B2 (en) 2011-09-27 2024-09-03 Thermochem Recovery International, Inc. Method of generating clean syngas
US11760631B2 (en) 2011-09-27 2023-09-19 Thermochem Recovery International, Inc. Method of producing a cooled syngas of improved quality
US11186483B2 (en) 2011-09-27 2021-11-30 Thermochem Recovery International, Inc. Method of producing sulfur-depleted syngas
US10800655B2 (en) 2011-09-27 2020-10-13 Thermochem Recovery International, Inc. Conditioned syngas composition, method of making same and method of processing same to produce fuels and/or fischer-tropsch products
WO2013062800A1 (fr) * 2011-10-26 2013-05-02 Rentech, Inc. Fluidisation de gazéifieur
US9168500B2 (en) 2011-10-26 2015-10-27 Res Usa, Llc Gasifier fluidization
US10125330B2 (en) 2011-10-26 2018-11-13 Res Usa, Llc Gasifier fluidization
WO2013062801A1 (fr) * 2011-10-26 2013-05-02 Rentech, Inc. Conception de pot-tampon
US10006632B2 (en) 2012-03-30 2018-06-26 General Electric Technology Gmbh Methods and apparatus for oxidation of unburnts
US20140065559A1 (en) * 2012-09-06 2014-03-06 Alstom Technology Ltd. Pressurized oxy-combustion power boiler and power plant and method of operating the same
US9765961B2 (en) 2015-03-17 2017-09-19 Saudi Arabian Oil Company Chemical looping combustion process with multiple fuel reaction zones and gravity feed of oxidized particles
US10222060B2 (en) * 2016-02-16 2019-03-05 Thermochem Recovery International, Inc. Two-stage energy-integrated product gas generation system and method
US11242988B2 (en) 2016-02-16 2022-02-08 Thermochem Recovery International, Inc. Two-stage energy-integrated product gas generation system and method
US10766059B2 (en) 2016-03-25 2020-09-08 Thermochem Recovery International, Inc. System and method for recovering inert feedstock contaminants from municipal solid waste during gasification
US10946423B2 (en) 2016-03-25 2021-03-16 Thermochem Recovery International, Inc. Particulate classification vessel having gas distributor valve for recovering contaminants from bed material
US11634650B2 (en) 2016-08-30 2023-04-25 Thermochem Recovery International, Inc. Method of producing liquid fuel from carbonaceous feedstock through gasification and recycling of downstream products
US11370982B2 (en) 2016-08-30 2022-06-28 Thermochem Recovery International, Inc. Method of producing liquid fuel from carbonaceous feedstock through gasification and recycling of downstream products
US12187969B2 (en) 2020-03-10 2025-01-07 Thermochem Recovery International, Inc. System and method for liquid fuel production from carbonaceous materials using recycled conditioned syngas
US12480061B2 (en) 2020-03-10 2025-11-25 Thermochem Recovery International, Inc. System and method for liquid fuel production from carbonaceous materials using recycled conditioned syngas

Also Published As

Publication number Publication date
CA2721101A1 (fr) 2009-11-26
CN102037280A (zh) 2011-04-27
JP2011521197A (ja) 2011-07-21
CN104006383A (zh) 2014-08-27
CA2721101C (fr) 2016-03-29
AU2009249749A1 (en) 2009-11-26
AU2009249749B2 (en) 2015-01-22
WO2009141281A1 (fr) 2009-11-26
EP2123978A1 (fr) 2009-11-25

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Owner name: ALSTOM TECHNOLOY, LTD., SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SEMEDARD, JEAN-CLAUDE;PITON, ANTHONY;BEAL, CORINNE;AND OTHERS;REEL/FRAME:026277/0387

Effective date: 20110502

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Owner name: ALSTOM TECHNOLOGY LTD, SWITZERLAND

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME AND STREET ADDRESS PREVIOUSLY RECORDED ON REEL 026277 FRAME 0387. ASSIGNOR(S) HEREBY CONFIRMS THE FROM "ALSTOM TECHNOLOY, LTD." TO "ALSTOM TECHNOLOGY LTD" AND FROM "BROWN SOVERI STASSE 7" TO "BROWN BOVERI STRASSE 7";ASSIGNORS:SEMEDARD, JEAN-CLAUDE;PITON, ANTHONY;BEAL, CORINNE;AND OTHERS;REEL/FRAME:028797/0106

Effective date: 20110502

STCB Information on status: application discontinuation

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