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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
  • 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
  • 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 (??)
laboratory testing
Laboratory Testing
  • 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
test measurements
Test Measurements
  • 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
comments
Comments
  • 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
  • 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 ConferenceOctober 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