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Computational Study on the Effects of Volume Ratio of DOC/DPF and Catalyst Loading on the PM and NOx Emission Control for Heavy-Duty Diesel Engines

Title
Computational Study on the Effects of Volume Ratio of DOC/DPF and Catalyst Loading on the PM and NOx Emission Control for Heavy-Duty Diesel Engines
Author
김우승
Keywords
NO2-assisted regeneration; DOC; DPF; Catalyst loading; Modeling; REGENERATION; OXIDATION
Issue Date
2008-10
Publisher
Korea Society of automotive Engineers
Citation
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY, v. 9, No. 6, Page. 659-670
Abstract
The use of a diesel particulate filter (DPF) in a diesel aftertreatment system has proven to be an effective and efficient method for removing particulate matter (PM) in order to meet more stringent emission regulations without hurting engine performance. One of the favorable PM regeneration technologies is the NO2-assisted regeneration method due to the capability of continuous regeneration of PM under a much lower temperature than that of thermal regeneration. In the present study, the thermal behavior of the monolith during regeneration and the conversion efficiency of NO2 from NO with an integrated exhaust system of a diesel oxidation catalyst (DOC) and DPF have been predicted by one-channel numerical simulation. The simulation results of the DOC, DPF, and integrated DOC-DPF models are compared with experimental data to verify the accuracy of the present model for the integrated DOC and DPF modeling. The effects of catalyst loading inside the DOC and the volume ratio between the DOC and DPF on the pressure drop, the conversion efficiency, and the oxidation rate of PM, have been numerically investigated. The results indicate that the case of the volume ratio of ‘DOC/DPF=1.5’ within the same diameter of both monoliths produced close to the maximum conversion efficiency and oxidation rate of PM. Under the engine operating condition of 175 kW at 2200 rpm, 100% load with a displacement of 8.1, approximately 55 g/ft3 of catalyst (Pt) loading inside the DOC with the active Pt surface of 5.3 m2/gpt was enough to maximize the conversion efficiency and oxidation rate of PM.
URI
https://link.springer.com/article/10.1007/s12239-008-0078-6http://repository.hanyang.ac.kr/handle/20.500.11754/80745
ISSN
1229-9138
DOI
10.1007/s12239-008-0078-6
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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