Patents by Inventor Paul W. Park
Paul W. Park 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: 20190085746Abstract: An aftertreatment system for treating a high-volume exhaust flow is provided. The aftertreatment system includes a filter module. The aftertreatment system also includes a conduit in fluid communication with the filter module. The aftertreatment system further includes at least one aftertreatment module in fluid communication with the conduit. The filter module is adapted to selectively receive at least one filter element therein. The at least one filter element is adapted to reduce a backpressure within the aftertreatment system. The filter module is also adapted to provide incremental levels of particulate matter reduction from the exhaust flow based, at least in part, on a number of filter elements therein.Type: ApplicationFiled: September 19, 2017Publication date: March 21, 2019Applicant: Caterpillar Inc.Inventors: Guillermo A. H. Malo, James J. Driscoll, Cory A. Smith, Guruprasad Gireesh, Paul W. Park, Anthony Rodman, Colleen J Anderson
-
Patent number: 8752370Abstract: An exhaust aftertreatment system including a housing with two or more inlets configured to receive separate entering exhaust streams from an engine. The system may include two or more first exhaust treatment devices, each configured to receive one of the separate entering exhaust streams in a first direction. The system may further include two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction and an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams. The system also may also includes two or more second exhaust treatment devices, each configured to receive one of the separate exiting exhaust streams in a third direction about 90 degrees from the second direction.Type: GrantFiled: December 9, 2010Date of Patent: June 17, 2014Assignee: Caterpillar Inc.Inventors: Craig P. Hittle, Stephan D. Roozenboom, Tetsu O. Velasquez, Paul W. Park, Shashank Mupparapu, Rick E. Jeffs, Michael P. Boahene, Yung T. Bui
-
Publication number: 20140162865Abstract: An engine oil including a base oil in a range of about 70 to 85 wt %. The engine oil includes at least one additive in a range of about 15 to 30 wt %, such as, an antioxidant, a cleaning agent/detergent, a dispersing agent, a wear resistant agent, a viscosity index improving agent, a pour point depressant, a rust/corrosion inhibiting agent, a foam inhibiting agent, and an extreme pressure agent. The engine oil further includes an additive including an organometallic compound of a catalyst consisting of a catalytic element in a range of about 0.001 to 0.05 wt %.Type: ApplicationFiled: December 11, 2012Publication date: June 12, 2014Applicant: Caterpillar Inc.Inventors: Paul W. Park, Hind M. Abi-Akar
-
Patent number: 8459012Abstract: A method for purging reductant from a reductant supply system is disclosed. The method includes dispensing reductant into an exhaust system via a dispensing device. The method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source.Type: GrantFiled: November 19, 2008Date of Patent: June 11, 2013Assignee: Caterpillar Inc.Inventors: Jinhui Sun, Shashank Mupparapu, Theodore J. Tarabulski, Paul W. Park
-
Patent number: 7803338Abstract: A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOx therein, wherein the apparatus includes a first catalyst composed of a silver containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, and a second catalyst composed of a copper containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range.Type: GrantFiled: June 21, 2005Date of Patent: September 28, 2010Assignees: ExonMobil Research and Engineering Company, Caterpillar Inc.Inventors: Richard F. Socha, James C. Vartuli, El-Mekki El-Malki, Mohan Kalyanaraman, Paul W. Park
-
Patent number: 7743602Abstract: A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOx therein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into H2 and/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst.Type: GrantFiled: September 1, 2006Date of Patent: June 29, 2010Assignees: ExxonMobil Research And Engineering Co., Caterpillar Inc.Inventors: Mohan Kalyanaraman, Paul W. Park, Christie S. Ragle
-
Publication number: 20100122521Abstract: A method for purging reductant from a reductant supply system is disclosed. The method includes dispensing reductant into an exhaust system via a dispensing device. The method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source.Type: ApplicationFiled: November 19, 2008Publication date: May 20, 2010Inventors: Jinhui Sun, Shashank Mupparapu, Theodore J. Tarabulski, Paul W. Park
-
Patent number: 7384455Abstract: According to an exemplary embodiment of the present disclosure, a method of detecting matter within a filtering device includes measuring a metric indicative of a first quantity of matter within the filtering device and removing a portion of the matter from the filtering device. The method also includes measuring a metric indicative of a second quantity of matter remaining within the filtering device.Type: GrantFiled: October 31, 2005Date of Patent: June 10, 2008Assignee: Caterpillar Inc.Inventors: Cheryl L. Sellers, Dong Fei, Jill R. Akers, Bappaditya Banerjee, Mark A. Gasper, Daniel S. Nordyke, Richard A. Crandell, Orlando Sellers, II, Christie S. Ragle, Ronald Silver, Julie M. Faas, Paul W. Park, Jeremy Trethewey
-
Publication number: 20080053073Abstract: A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOx therein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into H2 and/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst.Type: ApplicationFiled: September 1, 2006Publication date: March 6, 2008Inventors: Mohan Kalyanaraman, Paul W. Park, Christie S. Ragle
-
Publication number: 20070297961Abstract: A system and method for treating exhaust gas are provided. The system has a source of combustion exhaust, a first fluid passageway and a second fluid passageway. The first fluid passageway directs combustion exhaust from the source into the atmosphere. The second fluid passageway directs combustion exhaust from the source back into the source. The system also has at least one sulfur-oxide-removing device. The sulfur-oxide-removing device is disposed within at least one of the first or second fluid passageways.Type: ApplicationFiled: June 27, 2006Publication date: December 27, 2007Inventors: Ronald Silver, Alexander G. Panov, Paul W. Park, Julie M. Faas, Dennis L. Endicott, Svetlana M. Zemskova, Matthew Stefanick
-
Patent number: 7235221Abstract: The activity and durability of a zeolite lean-burn NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur dioxide to cause sulfate formation in the exhaust. The present invention is a method of suppressing sulfate formation in an exhaust purification system including a NOx catalyst. The NOx catalyst includes a zeolite loaded with at least one metal. The metal is selected from among an alkali metal, an alkaline earth metal, a lanthanide metal, a noble metal, and a transition metal. In order to suppress sulfate formation, at least a portion of the loaded metal is complexed with at least one of sulfate, phosphate, and carbonate.Type: GrantFiled: June 26, 2006Date of Patent: June 26, 2007Assignee: Caterpillar Inc.Inventors: Mari Lou Balmer-Millar, Paul W. Park, Alexander G. Panov
-
Patent number: 7094722Abstract: The activity and durability of a zeolite lean-bum NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur dioxide to cause sulfate formation in the exhaust. The present invention is a method of suppressing sulfate formation in an exhaust purification system including a NOx catalyst. The NOx catalyst includes a zeolite loaded with at least one metal. The metal is selected from among an alkali metal, an alkaline earth metal, a lanthanide metal, a noble metal, and a transition metal. In order to suppress sulfate formation, at least a portion of the loaded metal is complexed with at least one of sulfate, phosphate, and carbonate.Type: GrantFiled: December 20, 2002Date of Patent: August 22, 2006Assignee: Caterpillar Inc.Inventors: Mari Lou Balmer-Millar, Paul W. Park, Alexander G. Panov
-
Patent number: 7081231Abstract: The present disclosure pertains to a system and method for treatment of oxygen rich exhaust and more specifically to a method and system that combines non-thermal plasma with a metal doped ?-alumina catalyst. Current catalyst systems for the treatment of oxygen rich exhaust are capable of achieving only approximately 7 to 12% NOx reduction as a passive system and only 25–40% reduction when a supplemental hydrocarbon reductant is injected into the exhaust stream. It has been found that treatment of an oxygen rich exhaust initially with a non-thermal plasma and followed by subsequent treatment with a metal doped ?-alumina prepared by the sol gel method is capable of increasing the NOx reduction to a level of approximately 90% in the absence of SO2 and 80% in the presence of 20 ppm of SO2. Especially useful metals have been found to be indium, gallium, and tin.Type: GrantFiled: November 8, 2000Date of Patent: July 25, 2006Assignees: Caterpillar Inc., Battelle Memorial InstituteInventors: Christopher L. Aardahl, Mari Lou Balmer-Miller, Ashok Chanda, Craig F. Habeger, Kent A. Koshkarian, Paul W. Park
-
Publication number: 20040121899Abstract: The activity and durability of a zeolite lean-bum NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur dioxide to cause sulfate formation in the exhaust. The present invention is a method of suppressing sulfate formation in an exhaust purification system including a NOx catalyst. The NOx catalyst includes a zeolite loaded with at least one metal. The metal is selected from among an alkali metal, an alkaline earth metal, a lanthanide metal, a noble metal, and a transition metal. In order to suppress sulfate formation, at least a portion of the loaded metal is complexed with at least one of sulfate, phosphate, and carbonate.Type: ApplicationFiled: December 20, 2002Publication date: June 24, 2004Inventors: Mari Lou Balmer-Millar, Paul W. Park, Alexander G. Panov
-
Patent number: 6706660Abstract: A lean NOx catalyst and method of preparing the same is disclosed. The lean NOx catalyst includes a ceramic substrate, an oxide support material, preferably &ggr;-alumina, deposited on the substrate and a metal promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, vanadium, oxides thereof, and combinations thereof. The &ggr;-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between about 80 to 350 m2/g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to 0.2 weight percent. In a preferred embodiment the &ggr;-alumina is prepared by a sol-gel method, with the metal doping of the &ggr;-alumina preferably accomplished using an incipient wetness impregnation technique.Type: GrantFiled: December 18, 2001Date of Patent: March 16, 2004Assignee: Caterpillar IncInventor: Paul W. Park
-
Patent number: 6703343Abstract: The lean NOx catalyst includes a substrate, an oxide support material, preferably &ggr;-alumina deposited on the substrate and a metal or metal oxide promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium cerium, and vanadium, and oxides thereof, and any combinations thereof. The &ggr;-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between 80 and 350 m2/g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to about 0.2 weight percent. In a preferred embodiment the &ggr;-alumina is prepared by a sol-gel method, with the metal doping of the &ggr;-alumina preferably accomplished using an incipient wetness impregnation technique.Type: GrantFiled: December 18, 2001Date of Patent: March 9, 2004Assignee: Caterpillar IncInventor: Paul W. Park
-
Publication number: 20040042947Abstract: A method for reducing NOx in a gas stream by sequentially exposing the gas stream to a first and a second catalyst. The first catalyst converts at least a portion of the gas stream to a reducing gas, it reduces at least a portion of the NOx in a first temperature range, and it absorbs at least a portion of the NOx in the first temperature range. The second catalyst reduces at least a portion of the NOx in a second temperature range utilizing the reducing gas produced by the second catalyst. The reducing gas produced by the first catalyst is typically a partially oxidized hydrocarbon, preferably an aldehyde, and more preferably acetaldehyde or formaldehyde. In addition to the first and second catalysts, the gas stream may be exposed to a plasma. Preferably, the first catalyst is selected as a zeolite, and more preferably a zeolite impregnated with a cation.Type: ApplicationFiled: August 26, 2003Publication date: March 4, 2004Inventors: John Hoard, Christopher L. Aardahl, Paul W. Park
-
Publication number: 20030171216Abstract: A lean NOx catalyst and method of preparing the same is disclosed. The lean NOx catalyst includes a substrate, an oxide support material, preferably &ggr;-alumina deposited on the substrate and a metal or metal oxide promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, and vanadium, and oxides thereof, and any combinations thereof. The &ggr;-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between 80 and 350 m2/g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to about 0.2 weight percent. In a preferred embodiment the &ggr;-alumina is prepared by a sol-gel method, with the metal doping of the &ggr;-alumina preferably accomplished using an incipient wetness impregnation technique.Type: ApplicationFiled: December 18, 2001Publication date: September 11, 2003Inventor: Paul W. Park
-
Publication number: 20030134745Abstract: A lean NOx catalyst and method of preparing the same is disclosed. The lean NOx catalyst includes a ceramic substrate, an oxide support material, preferably &ggr;-alumina, deposited on the substrate and a metal promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, vanadium, oxides thereof, and combinations thereof. The &ggr;-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between about 80 to 350 m2/g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to 0.2 weight percent. In a preferred embodiment the &ggr;-alumina is prepared by a sol-gel method, with the metal doping of the &ggr;-alumina preferably accomplished using an incipient wetness impregnation technique.Type: ApplicationFiled: December 18, 2001Publication date: July 17, 2003Inventor: Paul W. Park
-
Publication number: 20030118960Abstract: A lean NOx aftertreatment system is disclosed. The lean NOx aftertreatment system includes a fuel source having oxygenated hydrocarbons homogeneously dispersed therein, a reductant extraction subsystem adapted for extracting the oxygenated hydrocarbons from the fuel, and a high performance lean NOx catalyst. The disclosed lean NOx catalyst is a metal or metal oxide doped alumina based catalyst (or other oxide material), wherein the metal or metal oxide dopant may be selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium, cerium, vanadium, oxides thereof, and combinations thereof.Type: ApplicationFiled: June 21, 2002Publication date: June 26, 2003Inventors: Mari Lou Balmer-Millar, Carrie L. Boyer, Virgil R. Hester, Paul W. Park, Christie S. Ragle