Patents Assigned to Texaco Inc.
  • Patent number: 9631057
    Abstract: In one embodiment the instant invention generally pertains to a method for producing glucose for fermentation. The method comprises first treating a biomass with acid and heat under conditions sufficient to produce a composition mixture comprising cellulose suitable for enzymatic hydrolysis. Next, at least a portion of the cellulose of step (a) is enzymatically hydrolyzed under conditions sufficient to form a composition comprising glucose. The glucose is then fermented. Advantageously, one or more reaction conditions are more efficient because they are selected by first measuring an initial hydrolysis rate of said biomass and then selecting one or more appropriate reaction conditions based upon said initial hydrolysis rate.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: April 25, 2017
    Assignees: Texaco Inc., Georgia Tech Research Corporation
    Inventors: Matthew James Realff, Ronald W. Smith, Prabuddha Bansal, Andreas Sebastian Bommarius, Melanie Hall, Jay Hyung Lee
  • Patent number: 9181505
    Abstract: The instant invention pertains to new processes which produce an energy source effectively, efficiently, and in a more environmentally friendly manner. The process comprises hydrolyzing a lignocellulosic feedstock to form lignocellulosic hydrolyzate and a hydrolyzate residue. The lignocellulosic hydrolyzate is treated to produce hydrogen. The hydrolyzate residue may be reacted with hydrogen in the presence of a catalyst to yield the energy source.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: November 10, 2015
    Assignee: Texaco Inc. & Texaco Development Corporation
    Inventors: James F. Stevens, Mukund R. Karanjikar, Kerry K. Spilker, Douglas Gene Naae, Dennis P. Essl, Peter Charles Ricci, Zoran Mirkovic, Thomas M. Vu, Stephen J. Decanio, Jerry M. Rovner, Jason C. Hicks
  • Patent number: 8494772
    Abstract: Methods for accurately and conveniently calculating the inventory of hydrogen storage in a stationary storage vessel using the external ambient temperature and the internal pressure are disclosed in the present invention. To account for the delay in the heat transfer from the ambient air to the storage vessel and then to the hydrogen gas a first order filter can be used on the external ambient temperature. Following the application of the first order filter on the external ambient temperature, an empirical equation is used to calculate the mass of hydrogen in the stationary storage vessel.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: July 23, 2013
    Assignee: Texaco Inc.
    Inventors: Daniel G. Casey, Brandon W. Janak, Paul D. Burger
  • Patent number: 8426071
    Abstract: An apparatus for separating liquid from a gas stream. The apparatus includes an elongated housing having a cylindrical inner surface and a gas stream inlet that is tangential to the side wall of the housing so as to cause the entering gas stream to swirl within the housing. A gas stream outlet is located at the top of the housing and a liquid outlet at the bottom. The gas stream outlet can include an elongated tubular member that extends into the housing and has an opening that is located below the housing gas stream inlet. Liquid components of the gas stream separate from the stream under the influence of centrifugal forces that are created by the swirling flow path of the stream within the housing. A liquid outlet and liquid outlet valve are provided for maintaining a minimum level of liquid within the housing so as to maintain a liquid seal within the housing. A level indicator may optionally be provided to monitor the liquid level within the housing.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: April 23, 2013
    Assignee: Texaco Inc
    Inventors: William Spencer Wheat, David Wayne Harrison, Sr., Daniel G. Casey, Kerry Kennedy Spilker
  • Patent number: 8394154
    Abstract: A process for preparation of synthesis gas and/or hydrogen by counter-currently providing an oxidation reactant stream through an oxidation chamber and a reforming reactant stream through a steam reforming chamber is described. Also provided is a reactor for conducting the reaction.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: March 12, 2013
    Assignee: Texaco Inc.
    Inventors: Lixin You, Curtis Krause, Kevin Nguyen, Amanda Vincent
  • Patent number: 8360117
    Abstract: Exemplary systems and methods are directed to monitoring a ground connection at a fueling facility. The system being configured to perform the method that includes measuring a vehicle ground quality. The method also includes determining a dispenser ground quality, evaluating the vehicle ground quality based on the dispenser ground quality and a threshold value, and controlling the dispensing of fuel based on the evaluation.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: January 29, 2013
    Assignee: Texaco Inc.
    Inventor: Masoud Hajiaghajani
  • Patent number: 8354081
    Abstract: A portable fuel processing apparatus and enclosure including an enclosure having an outer wall that defines an interior space and provides a gas impermeable barrier. Attached to the enclosure is porting means for use in moving the enclosure from one location to another. A fuel reformer capable of providing sufficient hydrogen-rich reformate to a fuel cell stack for use in generating at least about 1 kW per hour is disposed within the enclosure. An optional gas detection system includes a sensor disposed within the enclosure to monitor the interior of the enclosure for presence of combustible gases. The portable apparatus can have a number of connectors for connecting the enclosure and the fuel processing systems to a source of a reformer fuel and water as well as a domestic drain. Preferred sources of fuel and water are common utility lines available in buildings.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: January 15, 2013
    Assignee: Texaco, Inc.
    Inventors: William Spencer Wheat, James F. Stevens, Curtis L. Krause, Jeffrey A. Hedges, Eric G. Pow
  • Patent number: 8324413
    Abstract: In the present invention, a fuel composition and a process for making the same are disclosed. Specifically, in the present invention, triglycerides useful for distillate fuels are described along with their method for preparation from Fischer-Tropsch acid by-products and the glycerol by-product from biodiesel generation. By using these two by-product streams, the overall efficiency of both processes is improved and a new source of distillate fuels is created. These triglycerides can be used to improve the lubricity of Fischer-Tropsch derived distillate fuels. In addition, these triglycerides also have low melting points and have viscosities compatible with distillate fuels.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: December 4, 2012
    Assignee: Texaco Inc.
    Inventor: Dennis J. O'Rear
  • Patent number: 8308827
    Abstract: A diesel fuel containing a soot dispersant additive which is a grafted and derivatized low molecular weight copolymer of ethylene and at least one C3-C10 alpha monoolefin is provided. Also provided is a method for improving the fuel economy of a diesel engine which comprises operating the diesel engine with a fuel composition comprising (a) a major amount of a diesel fuel and (b) a minor fuel economy improving effective amount of the soot dispersant additive.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: November 13, 2012
    Assignee: Texaco, Inc.
    Inventors: C. Yvonne Thiel, Thomas E. Hayden
  • Patent number: 8297355
    Abstract: The invention pertains to new processes and apparatuses which can effectively and efficiently convert heat contained in wellhead fluids comprising hydrocarbons to a useful energy source like electricity. The process generally comprises first producing a heat containing fluid comprising one or more hydrocarbons from a wellhead and then passing the heat containing fluid to one or more heat exchangers. The one or more exchanger exchange at least a portion of the heat contained in the heat containing fluid to a working fluid thereby producing a heated working fluid capable of converting energy.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: October 30, 2012
    Assignee: Texaco Inc.
    Inventors: Walt D. Hamilton, John Penton, Karl Kolthoff, Timothy M. Veale, Jerry Lomax, David W. Bowers, Peter A. Schrimpf, Lynn Rouse, Myrna Buenviaje
  • Patent number: 8260464
    Abstract: A control technique for use in a fuel processor is disclosed. In one aspect, a control system includes a subsystem manager controller the operation of a respective physical subsystem for each of a plurality of physical subsystems in the fuel processor. The subsystem managers take their direction from a master control manager. In a second aspect, the subsystem managers collectively form a layer operating in conjunction with a second layer capable of interfacing the subsystem managers to their respective physical subsystems, a third layer capable of interfacing the subsystem managers with the second layer. In a third aspect, master control manager manages the operation of each physical subsystem through a respective subsystem manager, directs state transitions of the subsystem managers, and routs interaction between the subsystem managers from the master control manager.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: September 4, 2012
    Assignee: Texaco Inc.
    Inventors: Vesna R. Mirkovic, W. Spencer Wheat, Hugh N. To, Dennis J. Benedetto
  • Patent number: 8241374
    Abstract: The present invention discloses a fluidized bed system for the single step reforming technology for the production of hydrogen. Single step reforming combines the steam methane reforming, water gas shift, and carbon dioxide removal in a single step process of hydrogen generation. In the present invention, to address the heat transfer and the replenishment issues associated with single step reforming, the sorbent particles are fluidized. This fluidization allows the sorbent particles to be regenerated and consequently allows the optimal operating conditions for single step reforming to be maintained.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: August 14, 2012
    Assignee: Texaco Inc.
    Inventors: Farshad Bavarian, James F. Stevens, Balaji Krishnamurty, Yunquan Liu, Curtis L. Krause, Lixin You, Daniel G. Casey
  • Patent number: 8210214
    Abstract: An apparatus and method for providing a hydrogen rich gas stream at a high pressure for use by hydrogen vehicles or other devices requiring hydrogen rich feed streams are disclosed in the present invention. As the pressure of gaseous hydrogen is increased, the temperature of the gaseous hydrogen also increases due to the heat of compression. The apparatus and method of the present invention utilize localized cooling via a vortex tube to cool the gaseous hydrogen caused by the increase in pressure.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: July 3, 2012
    Assignee: Texaco Inc.
    Inventors: Daniel Glenn Casey, Bhaskar Balasubramanian
  • Patent number: 8211387
    Abstract: A combustor for oxidizing a combustion fuel and pre-heating one or more reactants for fuel reforming. The combustor includes an elongated housing having an inlet for receiving a combustion fuel and an outlet for exhausting combustion products. The elongated housing further includes a cylindrical side wall, a bottom wall, and a top wall. Inert particles are disposed within the housing adjacent the inlet. A combustion catalyst bed is disposed within the housing above the inert particles that is a mixture of inert particles and combustion catalyst. The inert particles and the combustion catalyst preferably have a volumetric ratio of inert particles to catalyst between about 2:1 and about 4:1. The combustor has at least one heat exchanger within the combustion catalyst bed for heating a reformer reactant and generating steam. Preferably, the combustor includes at least two heat exchangers within the combustion catalyst bed, the heat exchanging elements have different surface areas.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: July 3, 2012
    Assignee: Texaco Inc.
    Inventors: Vijay Anant Deshpande, Curtis L. Krause, Paul Francis Martin, Kevin Hoa Nguyen, James F. Stevens, William Spencer Wheat
  • Patent number: 8177545
    Abstract: A method for operating a combustor having a catalyst bed. The method includes the steps of directing a flow of air through a catalyst bed, providing heat to the catalyst bed, sensing the temperature in an upstream portion of the catalyst bed to provide an upstream temperature, directing a flow of a fuel through the catalyst bed when the upstream temperature reaches a light-off temperature to produce a combustion reaction, increasing the flow of the fuel until the flow of air and the flow of fuel have a selected air to fuel ratio, and controlling the combustion reaction within the catalyst bed by adjusting the flow of air and the flow of fuel while maintaining the selected air to fuel ratio. The method can include sensing temperatures within the catalyst bed and controlling the combustion reaction in response to the sensed temperatures. The heat provided to the catalyst bed can also be adjusted in response to the sensed temperatures.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: May 15, 2012
    Assignee: Texaco Inc.
    Inventors: Hongqiao Sun, Vesna R. Mirkovic, Bhaskar Balasubramanian, W. Spencer Wheat
  • Patent number: 8153311
    Abstract: The present invention provides a method and apparatus for identifying an activation of a burst disk. A pressure data or a temperature data relating to a flow is received. A determination is made whether the flow is interrupted based upon the at least one of the pressure data and the temperature data. A burst disk activation is identified in response to determining that the flow is interrupted.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: April 10, 2012
    Assignee: Texaco Inc. and Texaco Development Corporation
    Inventors: W. Spencer Wheat, Vesna R. Mirkovic, Ralph S. Worsley
  • Patent number: 8119299
    Abstract: A coolant subsystem for use in a fuel processor and a method for its operation are disclosed. In accordance with a first aspect, the coolant subsystem is separate from the feed to the processor reactor and is capable of circulating a coolant through the processor reactor. In accordance with a second aspect, the constituent elements of the fuel processor are housed in a cabinet, and the coolant subsystem is capable of cooling both the processor reactor and the interior of the cabinet. In various alternatives, the fuel processor can be employed to reform a fuel for a fuel cell power plant and/or may be used to provide thermal control for unrelated mechanical systems.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: February 21, 2012
    Assignee: Texaco Inc.
    Inventors: Hongqiao (Bruce) Sun, W. Spencer Wheat, Vesna R. Mirkovic, Daniel G. Casey
  • Patent number: 8062392
    Abstract: The present invention discloses a system for biomass treatment which addresses the need to find economical solutions to transport biomass. In the present invention, small, distributed gasifiers convert the biomass into synthesis gas (“syngas”). The syngas is then transported via a pipeline network to a central fuel production facility.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: November 22, 2011
    Assignee: Texaco Inc.
    Inventors: Paul F. Bryan, Yunquan Liu, Curtis L. Krause
  • Patent number: 8061392
    Abstract: In the present invention methods for storing gaseous hydrogen employing an ionic liquid are disclosed. The ionic liquid is used to displace the volume in the storage tanks. By displacing the volume in the storage tanks with the ionic liquid, the storage pressure can remain constant and the “stranded” gas can be eliminated. This constant pressure will also allow for a reduction in the number of storage tanks needed to provide the required inventory at hydrogen fueling stations. In addition, this constant pressure will provide a complete and fast fill to the vehicle.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: November 22, 2011
    Assignee: Texaco Inc.
    Inventor: Daniel G. Casey
  • Publication number: 20110274492
    Abstract: The present invention discloses embodiments of a drilled underground gaseous storage system. The embodiments of the present invention comprise storage tubes inserted below the surface of the ground for the storage of gases. The embodiments of the present invention may be used to store gaseous hydrogen. In addition, the embodiments of the present invention many be used to store other gases such as compressed natural gas.
    Type: Application
    Filed: May 6, 2010
    Publication date: November 10, 2011
    Applicant: Texaco Inc.
    Inventors: Puneet Verma, Amily C. Chuang, Tecle Rufael