Sulfur tolerance of selective partial oxidation of NO to NO2 in a plasma

Conference · Tue Aug 24 04:00:00 EDT 1999

DOI:https://doi.org/10.4271/1999-01-3687· OSTI ID:14417

Penetrante, B ^[1]; Brusasco, R M; Merritt, B T; Vogtlin, G E

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1. LLNL

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 t o increase in particulates and/or 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 .

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 14417
• Report Number(s): UCRL-JC-135481; KC0302010; KC0302010
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
COLD PLASMA
DIESEL ENGINES
EXHAUST GASES
NITRIC OXIDE
NITROGEN DIOXIDE
PARTIAL OXIDATION PROCESSES
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR TRIOXIDE