NOx Adsorber Desulfation Techniques for Heavy-Duty On-Highway Diesel Engines

Laroo, Christopher A.; Schenk, Charles; Olson, Brian; Way, Paul; McDonald, Joseph

doi:10.4271/2002-01-2871

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…The results of the first, second, and third testing phases have been previously reported. 1,2,3 The results of phases 1 and 2 have shown that NO x adsorbers can achieve NO x reductions efficiencies greater than ninety percent after a modest accumulation of hours. 1,2 Current adsorber formulations have been shown to lose NO x reduction performance over time.…”

Section: Introductionmentioning

confidence: 99%

NOx Adsorber Aging on a Heavy-Duty On-Highway Diesel Engine - Part One

Schenk¹,

Laroo²

2003

SAE Technical Paper Series

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A 5.9-liter medium-heavy-duty diesel engine, equipped with a diesel exhaust emission control system consisting of catalyzed diesel particulate filters and NO x adsorber catalysts arranged in a dual flow path configuration was evaluated with the goal of studying the thermal aging characteristics of a number of NO x adsorber formulations. These adsorbers were tested with near zero sulfur fuel and low sulfur engine oil to minimize the impact of sulfur poisoning on the test results. Testing was performed at a high temperature engine operating mode to provide accelerated but not abusive aging. The test duration ranged from 100 to 250 hours depending on the severity of the aging at the 100 hour mark. The initial "zero" sulfur testing screened the NO x adsorber formulations for future testing and established a thermal aging baseline.

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