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TitleEvaluation of a catalyzed diesel particulate filter coated by a mixture of novel soot oxidation and DeNOx catalysts using a tier 2 diesel engine, Progress Report: phase 3
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCaravaggio, G; Nossova, LORCID logo; Young, D A; Rubeli, B
SourceCanada Centre for Mineral and Energy Technology, ENERGY/ BIOLAB Division Report 2022-01, 2022, 53 pages Open Access logo Open Access
PublisherNatural Resources Canada
Mediadigital; on-line
File formatpdf
Subjectsfossil fuels; Science and Technology; diesel fuels; oxidation; petroleum engineering; oxides; nitrogen; carbon dioxide; hydrocarbons; modelling
Illustrationsschematic diagrams; tables; photographs; graphs; plots
ProgramCanmetENERGY - Ottawa Bioenergy
Released2022 04 01; 2022 11 02
The effectiveness of dual catalyzed diesel particulate filters (CDPF) to simultaneously oxidize diesel particulate matter (DPM) and reduce oxides of nitrogen (NOx) using selective catalytic reduction (SCR) was examined on an engine connected to a dynamometer. CanmetENERGY provided one dual catalyzed diesel particulate filter (CDPF) for this study. Balance point temperature was determined on the CDPF according to DECSE program [1]. The CanmetENERGY CDPFs (further referred to as CDPF in the report) showed some capacity to oxidize diesel particulate matter. The balance point temperature (BPT) for the CanmetENERGY CDPF was found at 394°C.
Progressive load test (PLT) on the CDPF showed a weak relationship between catalyst inlet temperature and catalyst activity as determined by increases and decreases in base engine emission concentrations.
ISO 8178-C1 8-Mode testing was performed on the CDPF as an alternative emission test to simulate engine operation in mining environment. The effectiveness of the CDPF for DPM removal was found to be 88%. Over the 8-Mode testing cycle, the SCR catalytic component was only able to achieve an integrated reduction in NOx emissions of 15%. Although total NOx reduction was poor, the CDPF system was able to achieve an 84% reduction of NO2.
Finally, the determined CDPF BPT of 394°C is comparable for similar systems. However, the system did not regenerate completely, leaving DPM retained in the CDPF.
Summary(Plain Language Summary, not published)
CanmetENERGY developed an innovative catalyst technology that aims to eliminate nitrous oxides (NOx) and diesel particular matter (DPM) emissions simultaneously and reduce overall size of the diesel exhaust systems. This was done by loading a selective catalytic reduction NOx and DPM oxidation catalysts into a wall flow filter (particulate filter). The objective of this project was to evaluate the ability of this novel catalyzed diesel particulate filter (CDPF) to reduce emissions of NOx and DPM during an engine test. The catalyst was tested by installing it on an engine connected to a dynamometer. During the test, a balance point temperature (BPT) was obtained and the amount of NOx eliminated was determined. The BPT is indicative of the soot removal performance of a CDPF. It is defined as the temperature at which the CDPF is eliminating soot by oxidation at the same rate that is being deposited in the converter. The determined CDPF BPT of 394°C is comparable to similar systems. The CDPF achieved a reduction in NOx emissions of 15%. Although total NOx reduction was low, the CDPF system was able to achieve an 84% reduction of NO2.

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