Patents by Inventor John M Pratapas

John M Pratapas 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).

  • Method and apparatus for real-time measurement of fuel gas compositions and heating values
    Patent number: 9291610
    Abstract: An exemplary embodiment can be an apparatus for real-time, in situ measurement of gas compositions and heating values. The apparatus includes a near infrared sensor for measuring concentrations of hydrocarbons and carbon dioxide, a mid infrared sensor for measuring concentrations of carbon monoxide and a semiconductor based sensor for measuring concentrations of hydrogen gas. A data processor having a computer program for reducing the effects of cross-sensitivities of the sensors to components other than target components of the sensors is also included. Also provided are corresponding or associated methods for real-time, in situ determination of a composition and heating value of a fuel gas.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: March 22, 2016
    Assignees: Gas Technology Institute, North Carolina State University
    Inventors: Serguei Zelepouga, John M. Pratapas, Alexei V. Saveliev, Vilas V. Jangale
  • METHOD AND APPARATUS FOR REAL-TIME MEASUREMENT OF FUEL GAS COMPOSITIONS AND HEATING VALUES
    Publication number: 20140326049
    Abstract: An exemplary embodiment can be an apparatus for real-time, in situ measurement of gas compositions and heating values. The apparatus includes a near infrared sensor for measuring concentrations of hydrocarbons and carbon dioxide, a mid infrared sensor for measuring concentrations of carbon monoxide and a semiconductor based sensor for measuring concentrations of hydrogen gas. A data processor having a computer program for reducing the effects of cross-sensitivities of the sensors to components other than target components of the sensors is also included. Also provided are corresponding or associated methods for real-time, in situ determination of a composition and heating value of a fuel gas.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Inventors: Serguei ZELEPOUGA, John M. Pratapas, Alexei V. Saveliev, Vilas V. Jangale
  • Combined fuel and air staged power generation system
    Patent number: 8733109
    Abstract: A method and apparatus for generation of electric power employing fuel and air staging in which a first stage gas turbine and a second stage partial oxidation gas turbine power operated in parallel. A first portion of fuel and oxidant are provided to the first stage gas turbine which generates a first portion of electric power and a hot oxidant. A second portion of fuel and oxidant are provided to the second stage partial oxidation gas turbine which generates a second portion of electric power and a hot syngas. The hot oxidant and the hot syngas are provided to a bottoming cycle employing a fuel-fired boiler by which a third portion of electric power is generated.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: May 27, 2014
    Assignee: Gas Technology Institute
    Inventors: Iosif K. Rabovitser, John M. Pratapas, Dmitri Boulanov
  • Co-production of fuels, chemicals and electric power using gas turbines
    Patent number: 8268896
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a stand-alone mechanical expander or a partial oxidation gas turbine, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: September 18, 2012
    Assignee: Gas Technology Institute
    Inventors: Arunabha Basu, Iosif K Rabovitser, John J Lewnard, John M Pratapas, Howard S Meyer, Dennis Leppin, Dmitri Boulanov
  • COMBINED FUEL AND AIR STAGED POWER GENERATION SYSTEM
    Publication number: 20110232292
    Abstract: A method and apparatus for generation of electric power employing fuel and air staging in which a first stage gas turbine and a second stage partial oxidation gas turbine power operated in parallel. A first portion of fuel and oxidant are provided to the first stage gas turbine which generates a first portion of electric power and a hot oxidant. A second portion of fuel and oxidant are provided to the second stage partial oxidation gas turbine which generates a second portion of electric power and a hot syngas. The hot oxidant and the hot syngas are provided to a bottoming cycle employing a fuel-fired boiler by which a third portion of electric power is generated.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 29, 2011
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Iosif K. Rabovitser, John M. Pratapas, Dmitri Boulanov
  • CO-PRODUCTION OF FUELS, CHEMICALS AND ELECTRIC POWER USING GAS TURBINES
    Publication number: 20110034569
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a stand-alone mechanical expander or a partial oxidation gas turbine, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Application
    Filed: February 2, 2010
    Publication date: February 10, 2011
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Arunabha Basu, Iosif K. Rabovitser, John J. Lewnard, John M. Pratapas, Howard S. Meyer, Dennis Leppin, Dmitri Boulanov