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

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Performance evaluation of advanced technology diesel oxidation catalysts

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 (??)


No 2 concentration before and after a conventional doc

NO2 Concentration before and after a Conventional DOC


Some characteristics of tested docs

Some Characteristics of Tested DOCs


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


Fuel used for this study

Fuel Used for this Study


Iso 8178 c1 8 mode test cycle

ISO 8178-C1, 8 Mode Test Cycle


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


Co concentration at test modes

CO Concentration at Test Modes


Carbon monoxide reduction with exhaust temperature

Carbon Monoxide Reduction with Exhaust Temperature


Hydrocarbon reduction with exhaust temperature

Hydrocarbon Reduction with Exhaust Temperature


Net reduction in no 2 with exhaust temperature

Net Reduction in NO2 with Exhaust Temperature


Reduction in exhaust quality index at test modes

Reduction in Exhaust Quality Index at Test Modes


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


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