Applying 3D X-ray Microscopy to Model Coated Gasoline Particulate Filters under Practical Driving Conditions

Raimund Walter; Jens Neumann; Astrid Velroyen

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Applying 3D X-ray Microscopy to Model Coated Gasoline Particulate Filters under Practical Driving Conditions

机译：Applying 3D X-ray Microscopy to Model Coated Gasoline Particulate Filters under Practical Driving Conditions

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Recent progress in 3D X-ray microscopy allows the analysis of coated gasoline particulate filters on a detailed pore-scale level.However,derivable detailed three-dimensional models for filter simulation are not applicable under transient driving conditions of automotive aftertreatment systems due to their inherent complexity.Here,we present a novel concept to utilize highly resolved 3D X-ray microscopy scans and their quantitative analysis for a macroscopic model of coated gasoline particulate filters intended to be applied in a driving cycle.A previously developed filtration model build on a ID + ID flow model on the channel scale of a filter is utilized.Accompanying measurements conducted on a dynamic engine test bench serve as validation for pressure drop and filtration characteristics.With the determined properties from 3D X-ray microscopy,the macroscopic model successfully replicates the measurements.Regarding the filter coating,the reduced porosity and a decrease of medium sized pores relative to an uncoated substrate reduce the filtration efficiency under steady-state as well as transient conditions.

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《Environmental Science & Technology: ES&T》 |2022年第17期|12014-12023|共10页
作者
Raimund Walter; Jens Neumann; Astrid Velroyen;
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作者单位

Development Powertrain,BMW Group,80937 Munich,Germany;

Department of Chemistry,Technical University of Munich,85748 Garching near-Munich,Germany;

Development Powertrain,BMW Group,80937 Munich,Germany;

Technology Material and Process Analysis,BMW Group,80937 Munich,Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
gasoline particulate filter; X-ray microscopy; filtration; three-way catalysis; substrate microstructure;

Applying 3D X-ray Microscopy to Model Coated Gasoline Particulate Filters under Practical Driving Conditions

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