Component Measurement of Ash Slipping through Diesel Particulate Filter due to Condensed Water

凝縮水による Diesel Particulate Filter 透過アッシュの成分計測

It has been reported that a fraction of the ash generated by a diesel engine can pass through the diesel particulate filter (DPF), causing malfunctioning of the PM sensor. In this study, to elucidate the mechanism of the ash slip, the components of ash passing through DPF due to condensed water in exhaust were measured using a HPLC and XRD. The ash sample used in this experiment was generated by an accelerated ash formation system constructed by the authors' own, which consisted of a diffusion flame burner. It was confirmed that the components of the generated ash using the developed system were similar to those of real-world ash accumulated in DPF. The experiments for the ash slip through DPF using the diesel engine exhaust and the generated ash were performed. The components of the slipped ash through DPF contained mainly Ca²⁺ and SO₄²⁻, which indicate that the CaSO₄ included in the ash dissolves in condensed water in the exhaust and passes through DPF.拡散火炎バーナーを応用したエンジンオイル由来の模擬アッシュを加速的に生成する手法を開発した.実車両より回収したアッシュと成分を比較することで,模擬アッシュの信頼性を確認した.この模擬アッシュを用いて,DPFに堆積したアッシュがDPFを透過する現象について,凝縮水の影響に着目し,透過する成分をHPLCにて計測した.

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  • Accession Number: 01673417
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:04PM