Patents by Inventor Mark T. Holtzapple
Mark T. Holtzapple 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).
-
Patent number: 8137955Abstract: According to one embodiment, a method for heat treatment of a biomass includes allowing biomass in a pretreatment reactor to undergo a pre-treatment reaction process. The pre-treatment reaction process yields pretreated biomass along with soluble components. A first liquid having a first temperature is transported into the pretreatment reactor and the pretreated biomass elevates the first temperature to a second temperature. At least a portion of the soluble components are captured in the first liquid, and the at least a portion of the soluble components in the first liquid and the first liquid are removed from the pretreatment reactor. A second liquid having a third temperature is transported into the pretreatment reactor and the pretreated biomass elevates the third temperature to a fourth temperature, the fourth temperature being less than second temperature.Type: GrantFiled: October 31, 2008Date of Patent: March 20, 2012Assignee: The Texas A&M University SystemInventors: Mark T. Holtzapple, Cesar B. Granda
-
Publication number: 20110287497Abstract: A method for integrating biological conversion of mixed acids to hydrocarbons, hydrocarbon-like molecules, biofuels, and combinations thereof. The method including introducing fermentation products to at least one microorganism chosen from the group consisting of heterotrophic microorganisms, photo-mixotrophic microorganisms, chemo-autotrophic microorganisms, and combinations thereof.Type: ApplicationFiled: April 26, 2011Publication date: November 24, 2011Inventors: Mark T. Holtzapple, Cesar B. Granda, Erik Holtzapple
-
Publication number: 20110236937Abstract: A method for operating a fermenter system. In one instances, the method comprises flowing biomass and liquid in opposite directions through a fermenter train comprising a plurality of fermenters, and introducing a nutrient to any of the plurality of fermenters to optimize the production carboxylate products in the fermenter system.Type: ApplicationFiled: March 24, 2011Publication date: September 29, 2011Applicant: THE TEXAS A&M UNIVERSITY SYSTEMInventors: Aaron Douglas Smith, Mark T. Holtzapple
-
Patent number: 8022586Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.Type: GrantFiled: February 15, 2010Date of Patent: September 20, 2011Assignees: The Texas A&M University System, StarRotor CorporationInventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
-
Publication number: 20110200476Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a earn plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.Type: ApplicationFiled: December 23, 2010Publication date: August 18, 2011Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
-
Patent number: 7950250Abstract: According to one embodiment of the invention, a jet ejector method includes providing a primary jet ejector having a primary inlet stream, coupling one or more secondary jet ejectors to the primary jet ejector such that all of the jet ejectors are in a cascaded arrangement, bleeding off a portion of the primary inlet stream and directing the portion of the primary inlet stream to the secondary jet ejector that is closest to the primary jet ejector in the cascaded arrangement, and directing a motive fluid into the secondary jet ejector that is farthest from the primary jet ejector in the cascaded arrangement. The method further includes, at each secondary jet ejector, receiving at least some of the portion of the primary inlet stream and at least some of the motive fluid to create respective mixtures within the secondary jet ejectors, and at each secondary jet ejector, directing at least a portion of the respective mixture to adjacent jet ejectors in the cascaded arrangement.Type: GrantFiled: January 10, 2008Date of Patent: May 31, 2011Assignees: Terrabon Adve, LLC, The Texas A&M University SystemInventors: Mark T. Holtzapple, Gary P. Noyes, George A. Rabroker
-
Publication number: 20100266435Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.Type: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Applicant: The Texas A&M University SystemInventors: Mark T. Holtzapple, George A. Rabroker
-
Publication number: 20100247360Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.Type: ApplicationFiled: March 29, 2010Publication date: September 30, 2010Applicant: The Texas A&M University SystemInventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes
-
Publication number: 20100248318Abstract: In one embodiment, the disclosure includes a method of biomass conversion including fermenting biomass to produce a carboxylic acid or carboxylate salt and hydrogen gas, recovering the hydrogen gas, and converting the carboxylic acid or carboxylate salt to an alcohol using the hydrogen gas. In one embodiment, the hydrogen produced by biomass conversion may be converted to an acetate. Another embodiment relates to a biomass conversion system. The system may include: a fermentation unit for fermentation of biomass to a carboxylic acid or carboxylate salt in a fermentation broth and for production of a carbon dioxide and hydrogen gas stream, an extraction unit for extracting the carboxylic acid or carboxylate salt from the fermentation broth, a gas extraction unit for separation of the hydrogen gas and the carbon dioxide, and a production unit for production of an alcohol from the carboxylic acid or carboxylate salt using the hydrogen gas.Type: ApplicationFiled: June 7, 2010Publication date: September 30, 2010Applicant: TEXAS A&M UNIVERSITY SYSTEMSInventors: Cesar B. Granda, Mark T. Holtzapple, Richard R. Davison
-
Publication number: 20100213786Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.Type: ApplicationFiled: February 15, 2010Publication date: August 26, 2010Applicants: The Texas A&M University System, StarRotor CorporationInventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
-
Patent number: 7780099Abstract: According to one embodiment of the invention, a system for altering fluid flow includes a main body having a first fluid flowing therethrough, a plurality of conduits disposed within the main body to form a plurality of flow paths, and a nozzle directing a second fluid through the innermost conduit. The second fluid has a greater velocity than the first fluid. The second fluid successively entrains the first fluid flowing through the flow paths in such a manner that the portion of the first fluid flowing through the innermost flow path existing between the innermost conduit and its adjacent conduit is entrained first and the portion of the first fluid flowing through the outermost flow path existing between the outermost conduit and the main body is last.Type: GrantFiled: January 12, 2004Date of Patent: August 24, 2010Assignee: The Texas A&M University SystemInventors: Mark T. Holtzapple, Othon Rediniotis
-
Publication number: 20100203625Abstract: According to one embodiment of the invention, a system for processing biomass comprises a chamber, a biomass input device, a fluid input device, and a retrieval device. The chamber is defined by at least a bottom, at least one wall, and a cover supported by the at least one wall. The biomass input device operable to deliver biomass into the chamber to form a biomass pile. The fluid input device is operable to deliver fluid into the chamber to the biomass pile. The retrieval device operable to receive fluid from the chamber.Type: ApplicationFiled: February 18, 2010Publication date: August 12, 2010Applicant: THE TEXAS A&M UNIVERSITY SYSTEMInventors: Mark T. Holtzapple, Richard Davison, Cesar Granda, Gary P. Noyes, Edward Darlington, III
-
Publication number: 20100185021Abstract: A method of producing alcohols, hydrocarbons, or both from biomass by converting biomass into a carboxylic acid, reacting the carboxylic acid with an olefin to produce an ester and hydrogenolyzing the ester to produce alcohol. A method of producing hydrocarbons from biomass by converting at least a portion of the biomass into a carboxylic acid, a ketone, or an ammonium carboxylate salt, reacting at least one of a portion of the carboxylic acid, a portion of the ketone, or a portion of the ammonium carboxylate salt in an oligomerization reactor as at least part of a process that produces an oligomerization product and separating hydrocarbons from the oligomerization product.Type: ApplicationFiled: December 2, 2009Publication date: July 22, 2010Applicant: THE TEXAS A&M UNIVERSITY SYSTEMInventors: Michael Kyle Ross, Gary Luce, John Spencer, Rae Spencer, Mark T. Holtzapple, Cesar B. Granda, Sebastian Taco Vasquez
-
Publication number: 20100152485Abstract: In accordance with the teachings of the present invention, a system and method converting biomass into useful chemicals are provided. In a particular embodiment, the method includes fermenting biomass in one or more fermentors to produce a fermentation broth comprising ammonium carboxylate salts, the fermentors containing an ammonium carbonate or ammonium bicarbonate buffer. The method further includes reacting the ammonium carboxylate salts from the fermentors with a high-molecular-weight amine to produce amine carboxylate salt, and thermally cracking the amine carboxylate salt to produce carboxylic acid. In another embodiment, the ammonium carboxylate salts from the fermentors may be reacted with a low-molecular-weight amine to produce a low-molecular-weight-amine carboxylate salt.Type: ApplicationFiled: February 3, 2010Publication date: June 17, 2010Applicant: TEXAS A&M UNIVERSITY SYSTEMInventors: Mark T. Holtzapple, Richard R. Davison, Cesar B. Granda, Frank K. Agbogbo, Zhihong Fu
-
Patent number: 7726959Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.Type: GrantFiled: March 5, 2007Date of Patent: June 1, 2010Assignee: The Texas A&M UniversityInventors: Mark T. Holtzapple, George A. Rabroker
-
Patent number: 7708865Abstract: According to one embodiment of the invention, a vapor-compression evaporation system includes a plurality of vessels in series each containing a feed having a nonvolatile component, a mechanical compressor coupled to the last vessel in the series and operable to receive a vapor from the last vessel in the series, a pump operable to deliver a cooling liquid to the mechanical compressor, a tank coupled to the mechanical compressor and operable to separate liquid and vapor received from the mechanical compressor, a plurality of heat exchangers coupled inside respective ones of the vessels, the heat exchanger in the first vessel in the series operable to receive the vapor from the tank, at least some of the vapor condensing therein, whereby the heat of condensation provides the heat of evaporation to the first vessel in the series, and wherein at least some of the vapor inside the first vessel in the series is delivered to the heat exchanger in the next vessel in the series, whereby the condensing, evaporating, aType: GrantFiled: September 17, 2004Date of Patent: May 4, 2010Assignees: Texas A&M University System, StarRotor CorporationInventors: Mark T. Holtzapple, Gary P. Noyes, George A. Rabroker
-
Patent number: 7695260Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.Type: GrantFiled: October 21, 2005Date of Patent: April 13, 2010Assignees: The Texas A&M University System, StarRotor CorporationInventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes
-
Patent number: 7663283Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.Type: GrantFiled: April 18, 2006Date of Patent: February 16, 2010Assignees: The Texas A & M University System, StarRoter CorporationInventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
-
Publication number: 20100003152Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a cam plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.Type: ApplicationFiled: January 21, 2005Publication date: January 7, 2010Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
-
Publication number: 20090324432Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.Type: ApplicationFiled: October 21, 2005Publication date: December 31, 2009Inventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes