Patents by Inventor Vidya Ramaswamy

Vidya Ramaswamy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170044930
    Abstract: An environmental barrier coating system for a component of a gas turbine includes at least one rare earth disilicate layer and at least one rare earth monosilicate layer. At least one of the at least one rare earth disilicate layer or the at least one rare earth monosilicate layer includes an alkaline earth oxide dopant.
    Type: Application
    Filed: August 14, 2015
    Publication date: February 16, 2017
    Inventors: Krishan Lal LUTHRA, Peter Joel MESCHTER, Vidya RAMASWAMY, Hongbo CAO
  • Patent number: 8617293
    Abstract: A porous membrane structure is disclosed, which includes a porous substrate, a mesoporous, aluminum oxide layer disposed on the substrate; and a relatively thin, continuous, microporous barrier layer disposed on the mesoporous aluminum oxide layer, also formed from aluminum oxide. The membrane is capable of improving hydrogen selectivity within a gas stream, e.g., a synthesis gas composition. Membrane supports containing these structures are also described, as well as gas separation modules, and related processes. Power plants which incorporate the gas separation modules are also disclosed herein.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: December 31, 2013
    Assignee: General Electric Company
    Inventors: Geoffrey Mark Eadon, Anthony Yu-Chung Ku, Vidya Ramaswamy
  • Patent number: 8056731
    Abstract: A membrane structure is provided. The membrane structure includes a polymer layer having a plurality of pores; and a ceramic layer disposed on the polymer layer. The ceramic layer has a plurality of substantially unconnected pores. Each of the substantially unconnected pores is in fluid communication with at least one of the pores of the polymer layer. A method of manufacturing a membrane structure is provided. The method includes the steps of providing a polymer layer having a plurality of pores; and disposing a ceramic layer on the polymer layer. Disposing a ceramic layer includes depositing a metal layer on the polymer layer; and anodizing the metal layer to convert the metal layer into a porous layer. At least one of the depositing step and the anodizing step is performed as a continuous process. Alternatively, at least one of the depositing and the anodizing step is performed as a batch process.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: November 15, 2011
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Anthony Yu-Chung Ku, William Hullinger Huber
  • Patent number: 8047382
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of interconnected pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. Each of the unconnected pores is in fluid communication with at least one of the interconnected pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; and disposing a second layer on the first layer. Disposing a second layer includes depositing a conducting layer on the first layer; and anodizing the conducting layer to convert the conducting layer into a porous layer.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: November 1, 2011
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan, Milivoj Konstantin Brun, Seth Thomas Taylor
  • Patent number: 8043418
    Abstract: An apparatus for separating at least one component from a mixture of a plurality of chemical species is provided. The apparatus comprises a membrane structure comprising a plurality of pores disposed within a matrix material to allow mass transport from a first surface of the membrane structure to a second surface of the membrane structure. The matrix material has a thermal conductivity of at least about 10 W/m/K; and a functional material disposed within at least a portion of the plurality of pores. The functional material has the property of promoting selective transport of at least one species through the membrane structure from the first surface to the second surface.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: October 25, 2011
    Assignee: General Electric Company
    Inventors: James Anthony Ruud, Michael John Bowman, Kalya Vijaya Sarathy, Mohan Manoharan, Anthony Yu-Chung Ku, Vidya Ramaswamy, Patrick Roland Lucien Malenfant
  • Publication number: 20110210013
    Abstract: A detection system is presented. The detection system includes a sensing component and a data analyzer. The sensing component includes a first sensor and a second sensor in fluid communication with the first sensor. The first sensor is disposed to allow operation at a predetermined temperature T1 and is selective to a first gas species at T1 and in presence of a second gas species. The second sensor is disposed to allow operation at a temperature T2 and is sensitive to the first gas species and a second gas species at T2. Temperature T2 is lower than T1. The data analyzer is disposed to receive an output signal from the sensing component and configured to calculate concentrations of the first gas species and the second gas species based on the output signal from the sensing component. A method of calculating concentrations of gas species in a gaseous mixture is also presented.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 1, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Mohan Manoharan, Todd-Michael Striker, Patrick Daniel Willson
  • Patent number: 7919025
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. At least a portion of the plurality of unconnected pores of the second layer is at least partially filled with a filler such that the first layer is substantially free of the filler. At least a portion of the plurality of unconnected pores of the second layer is in fluid communication with at least one of the pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; disposing a second layer on the first layer, and filling at least a portion of the unconnected pores of the second layer with a filler such that the first layer is substantially free of the filler.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: April 5, 2011
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, Seth Thomas Taylor, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan
  • Patent number: 7896949
    Abstract: Methods for separating carbon dioxide from a fluid stream at a temperature higher than about 200° C. with selectivity higher than Knudsen diffusion selectivity include contacting a porous membrane with the fluid stream to preferentially transport carbon dioxide. The porous membrane includes a porous support and a continuous porous separation layer disposed on a surface of the porous support and extending between the fluid stream and the porous support layer. The porous support comprises alumina, silica, zirconia, stabilized zirconia, stainless steel, titanium, nickel-based alloys, aluminum-based alloys, zirconium-based alloys or a combination thereof.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: March 1, 2011
    Assignee: General Electric Company
    Inventors: Anthony Yu-Chung Ku, James Anthony Ruud, Vidya Ramaswamy, Patrick Daniel Willson, Yan Gao
  • Publication number: 20110030382
    Abstract: A porous membrane structure is disclosed, which includes a porous substrate, a mesoporous, aluminum oxide layer disposed on the substrate; and a relatively thin, continuous, microporous barrier layer disposed on the mesoporous aluminum oxide layer, also formed from aluminum oxide. The membrane is capable of improving hydrogen selectivity within a gas stream, e.g., a synthesis gas composition. Membrane supports containing these structures are also described, as well as gas separation modules, and related processes. Power plants which incorporate the gas separation modules are also disclosed herein.
    Type: Application
    Filed: August 10, 2009
    Publication date: February 10, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Geoffrey Mark Eadon, Anthony Yu-Chung Ku, Vidya Ramaswamy
  • Patent number: 7850941
    Abstract: A method for forming an array of elongated nanostructures, includes in one embodiment, providing a substrate, providing a template having a plurality of pores on the substrate, and removing portions of the substrate under the plurality of pores of the template to form a plurality of cavities. A catalyst is provided in the plurality of cavities in the substrate, and the pores of the template are widened to expose the substrate around the catalyst so that the catalyst is spaced from the sides of the plurality of pores of the template. A plurality of elongated nanostructures is grown from the catalyst spaced from the sides of the pores of the template.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: December 14, 2010
    Assignee: General Electric Company
    Inventors: Loucas Tsakalakos, Bastiaan A. Korevaar, Joleyn E. Balch, Jody A. Fronheiser, Reed R. Corderman, Fred Sharifi, Vidya Ramaswamy
  • Publication number: 20100155252
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of interconnected pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. Each of the unconnected pores is in fluid communication with at least one of the interconnected pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; and disposing a second layer on the first layer. Disposing a second layer includes depositing a conducting layer on the first layer; and anodizing the conducting layer to convert the conducting layer into a porous layer.
    Type: Application
    Filed: March 2, 2010
    Publication date: June 24, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan, Milivoj Konstantin Brun, Seth Thomas Taylor
  • Patent number: 7717271
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of interconnected pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. Each of the unconnected pores is in fluid communication with at least one of the interconnected pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; and disposing a second layer on the first layer. Disposing a second layer includes depositing a conducting layer on the first layer; and anodizing the conducting layer to convert the conducting layer into a porous layer.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: May 18, 2010
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan, Milivoj Konstantin Brun, Seth Thomas Taylor
  • Publication number: 20100108241
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. At least a portion of the plurality of unconnected pores of the second layer is at least partially filled with a filler such that the first layer is substantially free of the filler. At least a portion of the plurality of unconnected pores of the second layer is in fluid communication with at least one of the pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; disposing a second layer on the first layer, and filling at least a portion of the unconnected pores of the second layer with a filler such that the first layer is substantially free of the filler.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 6, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Vidya Ramaswamy, Seth Thomas Taylor, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan
  • Publication number: 20100096066
    Abstract: A membrane structure is provided. A membrane structure has a top surface and a bottom surface. The membrane structure includes a plurality of sintered layers including an inner layer disposed between two outer layers. The membrane structure further includes a nonmonotonic gradient in pore size extending between the top surface and the bottom surface. A method of making a membrane structure is provided. The method includes the steps of providing at least one inner layer; providing a plurality of outer layers; and laminating the inner layer and the outer layers to obtain a membrane structure.
    Type: Application
    Filed: December 21, 2009
    Publication date: April 22, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Vidya Ramaswamy, Milivoj Konstantin Brun, Sergio Paulo Martins Loureiro, Anthony Yu-Chung Ku, Mohan Manoharan
  • Patent number: 7669719
    Abstract: A membrane structure is provided. The membrane structure includes a first layer having a plurality of pores; and a second layer disposed on, the first layer. The second layer has a plurality of unconnected pores. At least a portion of the plurality of unconnected pores of the second layer is at least partially filled with a filler such that the first layer is substantially free of the filler. At least a portion of the plurality of unconnected pores of the second layer is in fluid communication with at least one of the pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; disposing a second layer on the first layer, and filling at least a portion of the unconnected pores of the second layer with a filler such that the first layer is substantially free of the filler.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: March 2, 2010
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, Seth Thomas Taylor, James Anthony Ruud, Melissa Suzanne Sander, Anthony Yu-Chung Ku, Mohan Manoharan
  • Patent number: 7648566
    Abstract: An apparatus for producing hydrogen gas wherein the apparatus includes a reactor. In one embodiment, the reactor includes at least two conversion-removal portions. Each conversion-removal portion comprises a catalyst section configured to convert CO in the stream to CO2 and a membrane section located downstream of and in flow communication with the catalyst section. The membrane section is configured to selectively remove the CO2 from the stream and to be in flow communication with a sweep gas.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: January 19, 2010
    Assignee: General Electric Company
    Inventors: Wei Wei, James Anthony Ruud, Anthony Yu-Chung Ku, Vidya Ramaswamy, Ke Liu
  • Publication number: 20090218275
    Abstract: A membrane structure is provided. The membrane structure includes a polymer layer having a plurality of pores; and a ceramic layer disposed on the polymer layer. The ceramic layer has a plurality of substantially unconnected pores. Each of the substantially unconnected pores is in fluid communication with at least one of the pores of the polymer layer. A method of manufacturing a membrane structure is provided. The method includes the steps of providing a polymer layer having a plurality of pores; and disposing a ceramic layer on the polymer layer. Disposing a ceramic layer includes depositing a metal layer on the polymer layer; and anodizing the metal layer to convert the metal layer into a porous layer. At least one of the depositing step and the anodizing step is performed as a continuous process. Alternatively, at least one of the depositing and the anodizing step is performed as a batch process.
    Type: Application
    Filed: May 12, 2009
    Publication date: September 3, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Anthony Yu-Chung Ku, William Hullinger Huber
  • Patent number: 7547393
    Abstract: A membrane structure is provided. The membrane structure includes a polymer layer having a plurality of pores; and a ceramic layer disposed on the polymer layer. The ceramic layer has a plurality of substantially unconnected pores. Each of the substantially unconnected pores is in fluid communication with at least one of the pores of the polymer layer. A method of manufacturing a membrane structure is provided. The method includes the steps of providing a polymer layer having a plurality of pores; and disposing a ceramic layer on the polymer layer. Disposing a ceramic layer includes depositing a metal layer on the polymer layer; and anodizing the metal layer to convert the metal layer into a porous layer. At least one of the depositing step and the anodizing step is performed as a continuous process. Alternatively, at least one of the depositing and the anodizing step is performed as a batch process.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: June 16, 2009
    Assignee: General Electric Company
    Inventors: Vidya Ramaswamy, James Anthony Ruud, Anthony Yu-Chung Ku, William Hullinger Huber
  • Publication number: 20080210087
    Abstract: Methods for separating carbon dioxide from a fluid stream at a temperature higher than about 200° C. with selectivity higher than Knudsen diffusion selectivity include contacting a porous membrane with the fluid stream to preferentially transport carbon dioxide. The porous membrane includes a porous support and a continuous porous separation layer disposed on a surface of the porous support and extending between the fluid stream and the porous support layer. The porous support comprises alumina, silica, zirconia, stabilized zirconia, stainless steel, titanium, nickel-based alloys, aluminum-based alloys, zirconium-based alloys or a combination thereof.
    Type: Application
    Filed: April 22, 2008
    Publication date: September 4, 2008
    Applicant: General Electric Company
    Inventors: Anthony Yu-Chung Ku, James Anthony Ruud, Vidya Ramaswamy, Patrick Daniel Willson, Yan Gao
  • Patent number: 7396382
    Abstract: A porous membrane for separation of carbon dioxide from a fluid stream at a temperature higher than about 200° C. with selectivity higher than Knudsen diffusion selectivity. The porous membrane comprises a porous support layer comprising alumina, silica, zirconia or stabilized zirconia; a porous separation layer comprising alumina, silica, zirconia or stabilized zirconia, and a functional layer comprising a ceramic oxide contactable with the fluid stream to preferentially transport carbon dioxide. In particular, the functional layer may be MgO, CaO, SrO, BaO, La2O3, CeO2, ATiO3, AZrO3, AAl2O4, A1FeO3, A1MnO3, A1CoO3, A1NiO3, A2HfO3, A3CeO3, Li2ZrO3, Li2SiO3, Li2TiO3 or a mixture thereof; wherein A is Mg, Ca, Sr or Ba; A1 is La, Ca, Sr or Ba; A2 is Ca, Sr or Ba; and A3 is Sr or Ba.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: July 8, 2008
    Assignee: General Electric Company
    Inventors: Anthony Yu-Chung Ku, James Anthony Ruud, Jennifer Lynn Molaison, Louis Andrew Schick, Vidya Ramaswamy