Rajeev Prabhakar

US Patent:

20110000261, Jan 6, 2011

Filed:

Jul 2, 2009

Appl. No.:

12/497269

Inventors:

Rajeev S. PRABHAKAR - Wilmington DE, US
Chendhil Periasamy - Newark DE, US
Justin J. Wang - Newark DE, US
Robert Kalcevic - Versailles, FR

Assignee:

American Air Liquide, Inc. - Fremont CA

International Classification:

C03B 3/00
F23D 14/22
C03B 5/167
F23D 14/84

US Classification:

651359, 431 8

Abstract:

A burner recessed from a combustion space in a burner block adjacent the combustion space injects a secondary reactant (a second portion of a first reactant) around and upstream of a stream of a primary reactant (a first portion of the first reactant) and a stream of a second reactant in order to prevent or inhibit deposition of material from recirculating gases in the combustion space upon the burner. The first reactant is one of a fuel and an oxidant while the second reactant is the other of a fuel and an oxidant. The secondary stream may be injected from a continuous annulus formed in an outer body of the burner or from a plurality of radially spaced holes formed in the outer body. The primary stream is injected from one of an inner bore formed in an inner body of the burner and a reactant annulus defined between the inner and outer bodies while the second reactant is injected from the other of the inner bore and the reactant annulus.

US Patent:

20110183278, Jul 28, 2011

Filed:

Feb 25, 2009

Appl. No.:

12/936154

Inventors:

Brenice Belasse - Maintenon, FR
Robert Kalcevic - Versailles, FR
Chendhil Periasamy - Newark DE, US
Rajeev S. Prabhakar - Wilmington DE, US

Assignee:

L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude - Paris

International Classification:

F23D 14/62
B23P 11/00

US Classification:

431354, 29428

Abstract:

The invention relates to a combustion tool including a quarl block made of refractory material, the quarl block defining a quarl exit and a passage between the entry surface and quarl block, said tool including an injector of oxidizer and/or fuel that extends through the passage and opens into the quarl block, and also including a sheath that surrounds the injector in the passage section.

US Patent:

20120009531, Jan 12, 2012

Filed:

Jul 31, 2010

Appl. No.:

12/848131

Inventors:

Rajeev S. Prabhakar - Wilmington DE, US
Remi Pierre TSIAVA - Saint Germain-Les-Corbeil, FR
Magnus MORTBERG - Frankfurt am Main, DE
Vivek GAUTAM - Bear DE, US
Benoit GRAND - Versailles, FR
Bertrand LEROUX - Breuillet, FR

Assignee:

L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude - Paris
American Air Liquide, Inc. - Fremont CA

International Classification:

F23C 5/08
F23K 5/06
F23D 14/22
F23L 7/00

US Classification:

431 8, 431187

Abstract:

During a heating phase, injection of a jet of fuel and oxidant (fuel annularly enshrouding oxidant or oxidant annularly enshrouding fuel) from a fuel-oxidant nozzle is combusted in a combustion space. During a transition from the heating phase to a distributed combustion phase, an amount of a secondary portion of either the fuel or oxidant is injected as a jet into the combustion space while the primary portion of that same reactant from the fuel-oxidant nozzle is decreased. At some point during the transition phase, a jet of actuating fluid is injected at an angle towards the jet of reactants from the fuel-oxidant nozzle and/or towards the jet of the secondary portion of reactant. The jet of primary portions of reactants and/or secondary portion of reactant is caused to be bent/deviated towards the other of the two jets. The staging of the secondary portion of reactant is increased until a desired degrees of staging and commencement of a distributed combustion phase are achieved.

US Patent:

20120009532, Jan 12, 2012

Filed:

Jul 31, 2010

Appl. No.:

12/848132

Inventors:

Rajeev S. Prabhakar - Wilmington DE, US
Remi Pierre Tsiava - Saint Germain-Les-Corbeil, FR
Magnus Mortberg - Frankfurt am Main, DE
Benoit Grand - Versailles, FR
Bertrand Leroux - Linas, FR
Vivek Gautam - Bear DE, US

International Classification:

F23C 5/08
F23C 7/00
F23C 5/28
F23L 7/00

US Classification:

431 8, 431181, 431187, 110297

Abstract:

During a heating phase, injection of a jet of fuel and oxidant (fuel annularly enshrouding oxidant or oxidant annularly enshrouding fuel) from a fuel-oxidant nozzle is combusted in a combustion space. During a transition from the heating phase to a distributed combustion phase, an amount of a secondary portion of either the fuel or oxidant is injected as a jet into the combustion space while the primary portion of that same reactant from the fuel-oxidant nozzle is decreased. At some point during the transition phase, a jet of actuating fluid is injected at an angle towards the jet of reactants from the fuel-oxidant nozzle and/or towards the jet of the secondary portion of reactant. The jet of primary portions of reactants and/or secondary portion of reactant is caused to be bent/deviated towards the other of the two jets. The staging of the secondary portion of reactant is increased until a desired degrees of staging and commencement of a distributed combustion phase are achieved.

US Patent:

20120171629, Jul 5, 2012

Filed:

Dec 30, 2010

Appl. No.:

12/982818

Inventors:

Taekyu KANG - Wilmington DE, US
Vivek GAUTAM - Bear DE, US
Rajeev S. PRABHAKAR - Wilmington DE, US
Benoit GRAND - Versailles, FR
Bertrand LEROUX - Linas, FR
Magnus MORTBERG - Frankfurt am Main, DE
Nicolas Docquier - Philadelphia PA, US

Assignee:

American Air Liquide, Inc. - Fremont CA
Air Liquide Advanced Technologies U.S. LLC - Houston TX
L'Air Liquide Societe Anonyme Pour L'Etude Et L 'Exploitation Des Procedes Georges Claude - Paris

International Classification:

F23L 7/00
F23D 14/22
F23C 9/08
F23C 7/00
F23C 5/00

US Classification:

431 8, 431174, 110205, 110297, 431354

Abstract:

A burner has a fuel/oxidant nozzles and a pair of dynamical lances spaced on either side thereof that inject a jet of fuel and primary oxidant along a fuel injection axis, and jets of secondary oxidant, respectively. Jets of actuating fluid impinge against the jets of secondary oxidant to fluidically angle the jets of secondary oxidant away from the fuel injection axis. The action of the angling away together with staging of the oxidant between primary and secondary oxidant injections allows achievement of distributed combustion conditions.

US Patent:

20130344404, Dec 26, 2013

Filed:

Nov 16, 2012

Appl. No.:

13/678901

Inventors:

- Paris, FR
Rajeev S. Prabhakar - Wilmington DE, US

Assignee:

L'Air Liquide Societe Anonyme Pour l'Etude et l'Expoitation des Procedes Georges Claude - Paris

International Classification:

H01M 8/04

US Classification:

429413

Abstract:

A hybrid humidifier fuel cell for ensuring adequate humidification of a reactant gas stream in a fuel cell stack, during both steady-state, as well as transient operation. The device provides for improved performance through the use a primary humidification and a secondary humidification.

US Patent:

20130344405, Dec 26, 2013

Filed:

Nov 16, 2012

Appl. No.:

13/679163

Inventors:

Philippe A. COIGNET - Bear DE, US
Rajeev S. PRABHAKAR - Wilmington DE, US

Assignee:

L'Air Liquide Societe Anonyme Pour l'Etude et l'Expoitation des Procedes Georges Claude - Paris

International Classification:

H01M 8/04

US Classification:

429413

Abstract:

A method of using a hybrid humidifier fuel cell for ensuring adequate humidification of a reactant gas stream in a fuel cell stack, during both steady-state, as well as transient operation. The device provides for improved performance through the use a primary humidification and a secondary humidification.

US Patent:

20090007779, Jan 8, 2009

Filed:

Dec 28, 2007

Appl. No.:

11/966786

Inventors:

Philippe A. COIGNET - Bear DE, US
Rajeev S. PRABHAKAR - Wilmington DE, US

International Classification:

B01D 53/00
B01D 53/047
B01D 53/22
A01G 9/18

US Classification:

95 51, 95139, 47 17, 553854

Abstract:

A feed gas is separated into a CO-lean stream and a CO-enriched stream at a COenriching unit. The CO-enriched gas is fed to a greenhouse to enhance plant growth. The feed gas may include air and/or vent gas from the greenhouse.