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

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 LNTmore » system.« less
Authors:
; ; ;
Publication Date:
OSTI Identifier:
881777
DOE Contract Number:
FC26-02NT41609
Resource Type:
Technical Report
Research Org:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; ABSORPTION; CATALYSTS; COMPUTERIZED SIMULATION; DESULFURIZATION; EFFICIENCY; ENGINES; FABRICATION; GAS FLOW; MANAGEMENT; METHANE; NATURAL GAS; OXIDATION; PROGRESS REPORT; REGENERATION; SIMULATION