Experimental Study of Thermal Aging on Catalytic Diesel Particulate Filter Performance

2013-01-0524

04/08/2013

Event
SAE 2013 World Congress & Exhibition
Authors Abstract
Content
In this paper, a methodology is presented to study the influence of thermal aging on catalytic DPF performance using small scale coated filter samples and side-stream reactor technology. Different mixed oxide catalytic coating families are examined under realistic engine exhaust conditions and under fresh and thermally aged state.
This methodology involves the determination of filter physical (flow resistance under clean and soot loaded conditions and filtration efficiency) and chemical properties (reactivity of catalytic coating towards direct soot oxidation). Thermal aging led to sintering of catalytic nanoparticles and to changes in the structure of the catalytic layer affecting negatively the filter wall permeability, the clean filtration efficiency and the pressure drop behavior during soot loading. It also affected negatively the catalytic soot oxidation activity of the catalyzed samples. Based on the characterization results, feedback to the catalyst synthesis process can be provided and improved aging-tolerant catalytic formulations can be developed that exhibit minimal degradation after thermal aging. A set of relevant physicochemical properties of the fresh and aged DPFs is derived by analyzing mathematically the results permitting the extrapolation of this study to larger filter systems.
Meta TagsDetails
DOI
https://doi.org/10.4271/2013-01-0524
Pages
11
Citation
Zarvalis, D., Pappas, D., Lorentzou, S., Akritidis, T. et al., "Experimental Study of Thermal Aging on Catalytic Diesel Particulate Filter Performance," SAE Int. J. Engines 6(2):688-698, 2013, https://doi.org/10.4271/2013-01-0524.
Additional Details
Publisher
Published
Apr 8, 2013
Product Code
2013-01-0524
Content Type
Journal Article
Language
English