Accession Number:

ADA379573

Title:

Sulfur Tolerance of Selective Partial Oxidation of NO to NO2 in a Plasma

Descriptive Note:

Technical rept.

Corporate Author:

LAWRENCE LIVERMORE NATIONAL LAB CA

Personal Author(s):

• Penetrante, B. M.
• Brusasco, R. M.
• Merritt, B. T.
• Vogtlin, G. E.

Report Date:

1999-01-01

Pagination or Media Count:

12.0

Abstract:

Several catalytic aftertreatment technologies rely on the conversion of NO to NO2 to achieve efficient reduction of NOx and particulates in diesel exhaust. These technologies include the use of selective catalytic reduction of NOx with hydrocarbons, NOx adsorption, and continuously regenerated particulate trapping. These technologies require low sulfur fuel because the catalyst component that is active in converting NO to NO2 is also active in converting SO2 to SO3. The SO3 leads to increase in particulates andor poison active sites on the catalyst. A non-thermal plasma can be used for the selective partial oxidation of NO to NO2 in the gas phase under diesel engine exhaust conditions. This paper discusses how a non-thermal plasma can efficiently oxidize NO to NO2 without oxidizing SO2 to SO3.

Descriptors:

• *PLASMAS(PHYSICS)
• *REDUCTION
• *OXIDATION
• *TOLERANCE
• *SULFUR
• *NITROGEN OXIDES
• DIESEL ENGINES
• ADSORPTION
• VAPOR PHASES
• FUELS
• HYDROCARBONS
• PARTICULATES
• CATALYSTS
• POISONS
• EXHAUST SYSTEMS

Subject Categories:

• Organic Chemistry
• Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE