Performance Evaluation of Advanced Technology Diesel Oxidation Catalysts
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Performance Evaluation of Advanced Technology Diesel Oxidation Catalysts. 13 th U.S./North American Mine Ventilation Symposium June 13-16, 2010 M. K. Gangal, B. Rubeli & D.A. Young (Natural Resources Canada) J. Stekar (Catalytic Exhaust Products). Report#10-052 (OP). Background.

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Performance Evaluation of Advanced Technology Diesel Oxidation Catalysts

13th U.S./North American Mine Ventilation Symposium

June 13-16, 2010

M. K. Gangal, B. Rubeli & D.A. Young (Natural Resources Canada)

J. Stekar (Catalytic Exhaust Products)

Report#10-052 (OP)


Background
Background Oxidation Catalysts

  • DOCs in use since 1970’s to reduce CO, HC, DPM, odour

  • Rate of reduction varies on washcoat, metal type and loading, temperature

  • Many conventional DOCs oxidize

    NO NO2, SO2 sulphate H2SO4

  • Need DOCs to reduce NO2 also


Conventional docs
Conventional DOCs Oxidation Catalysts

  • Substrate made of ceramic, metallic materials

  • Coated with precious metals (platinum, palladium), mostly to reduce CO, HC

  • Coated with base metals (cerium, iron), mostly to reduce SOF

  • Coated with both to reduce, CO, HC, SOF

  • Reduction, CO (60-95%), HC (50-80%), DPM (10-30%), NO2 (??)


No 2 concentration before and after a conventional doc
NO Oxidation Catalysts2 Concentration before and after a Conventional DOC



Laboratory testing
Laboratory Testing Oxidation Catalysts

  • Kubota engine V3307-DI-T, 3,3L

    • Rated at 55.4 kW @ 2600 rpm

    • 4 Cylinder, DI, turbocharged

    • Cooled exhaust gas recirculation (EGR)

    • Conforms to EPA interim tier 4 emission

    • Confirms to CAN/CSA-M424.2-M90 for non-gassy underground mines


Fuel used for this study
Fuel Used for this Study Oxidation Catalysts


Iso 8178 c1 8 mode test cycle
ISO 8178-C1, 8 Mode Test Cycle Oxidation Catalysts


Test measurements
Test Measurements Oxidation Catalysts

  • Engine parameters

    • Speed, torque, power, fuel rate, airflow rate, exhaust temperature

  • Exhaust gases

    • CO, CO2, NO, NOx, O2, HC

    • Particulates (DPM)

  • Engine intake restriction set at 4 kPa

  • Engine exhaust backpressure set at 15 kPa


Co concentration at test modes
CO Concentration at Test Modes Oxidation Catalysts




Net reduction in no 2 with exhaust temperature
Net Reduction in NO Oxidation Catalysts2 with Exhaust Temperature



Comments
Comments Oxidation Catalysts

  • All DOCs were found to be equally effective in reducing CO(84-86%) and HC (71-74%) based on mass emission rate

  • All DOCs reduced DPM, DOC-A (9%). DOC-B (12%), DOC-C(20%) based on mass emission rates

  • Reduction in NO2 was, DOC-A (29%), DOC-B (-106%), and DOC-C (-55%) based on mass emission rate


Comments1
Comments Oxidation Catalysts

  • Exhaust gas temperature plays a important part in reducing NO2, all tested DOCs reduced NO2 concentration below 350 ºC

  • DOCs produced varying degree of results even if they are sized properly, hence it important to get a proper DOC for the required engine and duty cycle.

  • Advanced DOCs are available which reduce NO2 as well as DPM.


Mdec conference october 5 8 2010
MDEC Conference Oxidation CatalystsOctober 5-8, 2010

  • Hilton Toronto Airport Hotel

  • October 3/4 – Field Trip to Cummins Engine Plant, NY

  • October 5 – Diesel Workshop on Advanced Engine Technology and Biodiesel

  • October 6/7- Technical sessions

  • October 8 – Roundtable Forum

  • For more info: www.mdec.ca


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