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.


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