Global ETD Search
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Showing 1 to 4 of 4 for “"Lean NOx traps"”.
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Heavy-duty diesel vehicle Nox̳ aftertreatment in 2010 : the infrastructure and compliance challenges of urea-SCR
… regulations are prompting the use of PM and NOx aftertreatment systems in the US, the EU and Japan. In the US, the EPA Highway Diesel Rule, which will be fully implemented in 2010, has stimulated debate over whether urea selective catalytic reduction (urea-SCR) or lean NOx traps (LNT) are the …
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Applied and Fundamental Studies of LNT-SCR Dual-layer Monolithic Catalysts for Lean NOx Emission Control
… stringent both greenhouse gas (GHG) and tailpipe NOx emission standards have driven the continuous improvement of commercial deNOx technologies, NOx reduction & storage (NSR, also referred to as lean NOx trap (LNT)) and selective catalytic reduction (SCR) technologies. This dissertation conducts …
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Modeling and Simulation of Coupled LNT – SCR Catalytic System under Anaerobic and Aerobic Operating Conditions
… metal loading in the LNT while keeping the NOx emission below a specified level. We present a mathematical model of this system using hydrogen as the reductant. Simulations are used to determine the influence of the architecture of the LNT-SCR bricks, non-uniform precious metal loading in …
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NOx Removal by LNT-SCR Dual-layer Catalysts
… emission standards have driven the progress of NOx storage and reduction (NSR) technology. NOx is stored in a lean NOx trap (LNT) catalyst during fuel-lean mode and reduced to N2 during fuel-rich mode. First, we investigated the impact of ceria on NSR in an Pt/Ce LNT catalyst. The physisorbed …