NDLI: Effect of Soot Accumulation on Light-Off Performance of Field-Aged and Accelerated Phosphorus Poisoning Diesel Oxidation Catalysts

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Effect of Soot Accumulation on Light-Off Performance of Field-Aged and Accelerated Phosphorus Poisoning Diesel Oxidation Catalysts

Content Provider	Semantic Scholar
Author	Eaton, Scott J. Nguyen, Ke Bunting, Bruce G. Toops, Todd J.
Copyright Year	2006
Abstract	Introduction The diesel oxidation catalyst (DOC) is used extensively to reduce total hydrocarbon (THC), carbon monoxide (CO) as well as total particulate matter (TPM) by targeting the soluble organic fraction of soot. Investigations into DOC deactivation mechanisms have identified three main contributors: thermal aging, fouling and poisoning. Thermal aging is very much a materials issue, whereas fouling and poisoning are directly linked to drive-train conditions. The incorporation of DOCs into advanced aftertreatment systems requires an understanding of the role soot accumulation and poisons derived from fuel and lube-oil play in deactivation to extend device lifetime. Although phosphorus derived from the lube-oil additive zinc dialkyldithiophosphate (ZDDP) has been shown to degrade three-way catalysts activity [13], the role of phosphorus poisoning and soot accumulation on DOC deactivation is less understood. In the present study, the effect of soot accumulation and phosphorus poisoning on THC and CO oxidation performance of DOCs is investigated. THC and CO performance of deactivated DOCs obtained from a bus fleet as well as accelerated phosphorus poisoning DOCs are evaluated using a single-cylinder diesel engine and bench-flow reactor. Phosphorus and soot content is analyzed using XRF, EPMA, SEM and XRD.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://old.nacatsoc.org/20nam/abstracts/O-S5-09.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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