Romesh Kumar

US Patent:

6843960, Jan 18, 2005

Filed:

Jun 12, 2002

Appl. No.:

10/167832

Inventors:

Michael Krumpelt - Naperville IL, US
Terry Alan Cruse - Lisle IL, US
John David Carter - Bolingbrook IL, US
Jules L. Routbort - Hinsdale IL, US
Romesh Kumar - Naperville IL, US

Assignee:

The University of Chicago - Chicago IL

International Classification:

B22F 300

US Classification:

419 6, 419 9, 419 10, 419 40

Abstract:

A method for preparing compositionally graded metallic plates and compositionally graded metallic plates suitable for use as interconnects for solid oxide fuel cells are provided. The method of the invention, utilizing powder metallurgy, enables making metallic plates of generally any desired composition to meet the corrosion requirements of fuel cells and other applications, and enables making metallic plates of graded composition from one surface of the plate to the other. A powder of the desired alloy composition is obtained, then solvents, dispersants, a plasticizer and an organic binder are added to form a slip. The slip is then formed into a layer on a desired substrate that can be flat or textured. Once dried, the layer is removed from the substrate and the binder is burned out. The layer is sintered in a reducing atmosphere at a set temperature for a predefined duration specific to the materials used and the desired final properties.

US Patent:

20030232230, Dec 18, 2003

Filed:

Jun 12, 2002

Appl. No.:

10/167917

Inventors:

John Carter - Bolingbrook IL, US
Terry Cruse - Lisle IL, US
James Ralph - Chicago IL, US
Romesh Kumar - Naperville IL, US
Michael Krumpelt - Naperville IL, US

International Classification:

H01M008/12
H01M008/24

US Classification:

429/032000, 429/038000, 264/618000

Abstract:

A solid oxide fuel cell (SOFC) repeat unit includes an oxide electrolyte, an anode, a metallic fuel flow field, a metallic interconnect, and a metallic air flow field. The multilayer laminate is made by casting tapes of the different functional layers, laminating the tapes together and sintering the laminate in a reducing atmosphere. Solid oxide fuel cell stacks are made by applying a cathode layer, bonding the unit into a gas manifold plate, and then stacking the cells together. This process leads to superior mechanical properties in the SOFC due to the toughness of the supporting metallic layers. It also reduces contact resistances in stacking the cells since there is only one physical contact plane for each repeat unit.

US Patent:

20110005302, Jan 13, 2011

Filed:

Jul 13, 2010

Appl. No.:

12/835614

Inventors:

Shabbir AHMED - Naperville IL, US
Sheldon H.D. Lee - Willowbrook IL, US
Romesh Kumar - Naperville IL, US
Dionissios D. Papadias - Chicago IL, US

Assignee:

UCHICAGO ARGONNE LLC - Chicago IL

International Classification:

G01N 33/00

US Classification:

73 3103

Abstract:

Provided herein are methods and devices to enrich trace quantities of impurities in gaseous mixtures, such as hydrogen fuel. The methods and devices rely on concentration of impurities so as to allow the detection of the impurities using commonly-available detection methods.

US Patent:

48986925, Feb 6, 1990

Filed:

Nov 16, 1988

Appl. No.:

7/271967

Inventors:

John B. Rajan - Naperville IL
Romesh Kumar - Naperville IL
Donald R. Vissers - Naperville IL

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G21F 916

US Classification:

252629

Abstract:

Radioactive alkali metal is introduced into a cyclone reactor in droplet form by an aspirating gas. In the cyclone metal reactor the aspirated alkali metal is contacted with silica powder introduced in an air stream to form in one step a glass. The sides of the cyclone reactor are preheated to ensure that the initial glass formed coats the side of the reactor forming a protective coating against the reactants which are maintained in excess of 1000. degree. C. to ensure the formation of glass in a single step.

US Patent:

63030985, Oct 16, 2001

Filed:

Aug 24, 1999

Appl. No.:

9/382737

Inventors:

Kurt W. Kramarz - Murrysville PA
Ira D. Bloom - Bolingbrook IL
Romesh Kumar - Naperville IL
Shabbir Ahmed - Bolingbrook IL
Rolf Wilkenhoener - Oakbrook Terrace IL
Michael Krumpelt - Naperville IL

Assignee:

University of Chicago - Chicago IL

International Classification:

C01B 316

US Classification:

423656

Abstract:

A method of forming a hydrogen rich gas from a source of hydrocarbon fuel. A vapor of the hydrocarbon fuel and steam is brought in contact with a two-part catalyst having a dehydrogenation powder portion and an oxide-ion conducting powder portion at a temperature not less than about 770. degree. C. for a time sufficient to generate the hydrogen rich. The H. sub. 2 content of the hydrogen gas is greater than about 70 percent by volume. The dehydrogenation portion of the catalyst includes a group VIII metal, and the oxide-ion conducting portion is selected from a ceramic oxide from the group crystallizing in the fluorite or perovskite structure and mixtures thereof. The oxide-ion conducting portion of the catalyst is a ceramic powder of one or more of ZrO. sub. 2, CeO. sub. 2, Bi. sub. 2 O. sub. 3, (BiVO). sub. 4, and LaGaO. sub. 3.

US Patent:

59423463, Aug 24, 1999

Filed:

Jul 6, 1998

Appl. No.:

9/110373

Inventors:

Shabbir Ahmed - Bolingbrook IL
Romesh Kumar - Naperville IL
Michael Krumpelt - Naperville IL

Assignee:

The University of Chicago - Chicago IL

International Classification:

H01M 806

US Classification:

429 20

Abstract:

A partial oxidation reformer comprising a longitudinally extending chamber having a methanol, water and an air inlet and an outlet. An igniter mechanism is near the inlets for igniting a mixture of methanol and air, while a partial oxidation catalyst in the chamber is spaced from the inlets and converts methanol and oxygen to carbon dioxide and hydrogen. Controlling the oxygen to methanol mole ratio provides continuous slightly exothermic partial oxidation reactions of methanol and air producing hydrogen gas. The liquid is preferably injected in droplets having diameters less than 100 micrometers. The reformer is useful in a propulsion system for a vehicle which supplies a hydrogen-containing gas to the negative electrode of a fuel cell.

US Patent:

61108618, Aug 29, 2000

Filed:

Jun 2, 1997

Appl. No.:

8/867556

Inventors:

Michael Krumpelt - Naperville IL
Shabbir Ahmed - Bolingbrook IL
Romesh Kumar - Naperville IL
Rajiv Doshi - Downers Grove IL

Assignee:

The University of Chicago - Chicago IL

International Classification:

B01J 2340
C04B 3548
H01M 486
G01N 2726

US Classification:

502326

Abstract:

A two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion. The dehydrogenation portion is a group VIII metal and the oxide-ion conducting portion is selected from a ceramic oxide crystallizing in the fluorite or perovskite structure. There is also disclosed a method of forming a hydrogen rich gas from a source of hydrocarbon fuel in which the hydrocarbon fuel contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion at a temperature not less than about 400. degree. C. for a time sufficient to generate the hydrogen rich gas while maintaining CO content less than about 5 volume percent. There is also disclosed a method of forming partially oxidized hydrocarbons from ethanes in which ethane gas contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion for a time and at a temperature sufficient to form an oxide.

US Patent:

59292865, Jul 27, 1999

Filed:

Jun 5, 1998

Appl. No.:

9/092190

Inventors:

Michael Krumpelt - Naperville IL
Shabbir Ahmed - Bolingbrook IL
Romesh Kumar - Naperville IL
Rajiv Doshi - Downers Grove IL

Assignee:

The University of Chicago - Chicago IL

International Classification:

C07C 4551

US Classification:

568383

Abstract:

A method of forming a hydrogen rich gas from a source of hydrocarbon fuel in which the hydrocarbon fuel contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion at a temperature not less than about 400. degree. C. for a time sufficient to generate the hydrogen rich gas while maintaining CO content less than about 5 volume percent. There is also disclosed a method of forming partially oxidized hydrocarbons from ethanes in which ethane gas contacts a two-part catalyst comprising a dehydrogenation portion and an oxide-ion conducting portion for a time and at a temperature sufficient to form an oxide.

Address:

1549 Ceals Ct, Naperville, IL 60565

VIN:

JTDKN3DU6A0073867

Make:

TOYOTA

Model:

PRIUS

Year:

2010