Study on PM Oxidation over Ash-deposited Catalyzed Diesel Particulate Filters

アッシュ堆積時における触媒付ディーゼル微粒子捕集フィルター上の PM 酸化挙動解析

The PM oxidation behavior over ash-deposited catalyzed diesel particulate filters (CDPFs) was studied by using small-scale evaluation and visualization techniques. Before ash deposition, a CDPF with CeO₂–Ag (CA) catalyst reduced the temperature required for PM oxidation by about 100 °C compared to a CDPF with Pt/Alx₂O₃ catalyst or to a DPF alone. The catalytic performance of the CDPF with CA was decreased by ash deposition, however, it was observed until ash deposition reached 40g/L by weight or 100 μm by thickness. ESR analysis suggested that this remote PM oxidation could be due to migration of superoxide species generated on the CA catalyst.アッシュ堆積時の触媒付DPF上のPM酸化挙動を活性試験と可視化試験により解析した．アッシュ堆積がない場合，銀-セリア触媒付DPFは，白金/アルミナ触媒付DPFより約100℃低温でPMを酸化した．アッシュが堆積すると，後者はすぐに活性消失したが，前者はアッシュ堆積量40g/L，堆積厚さ100μm程度まで活性を発現した．

• Record URL:
  https://doi.org/10.11351/jsaeronbun.46.65
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Yamazaki, Kiyoshi
  • Sakakibara, Yuji
  • Daido, Shigeki
  • Okawara, Seiji
• Publication Date: 2015

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: pp 65-70
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 46
  • Issue Number: 1
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0287-8321
  • EISSN: 1883-0811
  • Serial URL: https://www.jstage.jst.go.jp/browse/jsaeronbun
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Ash content; Catalysts; Evaluation; Filters; Heat engines; Oxidation; Particulates
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01665018
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Mar 30 2018 4:32PM