Energy Efficient Thermal Management for Natural Gas Engine Aftertreatment via Active Flow Control

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Description

The project is focused on the development of an energy efficient aftertreatment system capable of reducing NOx and methane by 90% from lean-burn natural gas engines by applying active exhaust flow control. Compared to conventional passive flow-through reactors, the proposed scheme cuts supplemental energy by 50%-70%. The system consists of a Lean NOx Trap (LNT) system and an oxidation catalyst. Through alternating flow control, a major amount of engine exhaust flows through a large portion of the LNT system in the absorption mode, while a small amount of exhaust goes through a small portion of the LNT system in the ... continued below

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Irick, David K.; Nguyen, Ke; Naoumov, Vitacheslav & Ferguson, Doug April 1, 2006.

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Description

The project is focused on the development of an energy efficient aftertreatment system capable of reducing NOx and methane by 90% from lean-burn natural gas engines by applying active exhaust flow control. Compared to conventional passive flow-through reactors, the proposed scheme cuts supplemental energy by 50%-70%. The system consists of a Lean NOx Trap (LNT) system and an oxidation catalyst. Through alternating flow control, a major amount of engine exhaust flows through a large portion of the LNT system in the absorption mode, while a small amount of exhaust goes through a small portion of the LNT system in the regeneration or desulfurization mode. By periodically reversing the exhaust gas flow through the oxidation catalyst, a higher temperature profile is maintained in the catalyst bed resulting in greater efficiency of the oxidation catalyst at lower exhaust temperatures. The project involves conceptual design, theoretical analysis, computer simulation, prototype fabrication, and empirical studies. This report details the progress during the first twelve months of the project. The primary activities have been to develop the bench flow reactor system, develop the computer simulation and modeling of the reverse-flow oxidation catalyst, install the engine into the test cell, and begin design of the LNT system.

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  • Report No.: none
  • Grant Number: FC26-02NT41609
  • DOI: 10.2172/881821 | External Link
  • Office of Scientific & Technical Information Report Number: 881821
  • Archival Resource Key: ark:/67531/metadc885964

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  • April 1, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 7, 2016, 11:03 a.m.

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Irick, David K.; Nguyen, Ke; Naoumov, Vitacheslav & Ferguson, Doug. Energy Efficient Thermal Management for Natural Gas Engine Aftertreatment via Active Flow Control, report, April 1, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc885964/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.