Catalytic Technologies for the Suppression of Phosphorus Poisoning on the Three-way Catalysts

三元触媒のリン被毒現象の解明と被毒抑制技術の開発

As the high amount of Phosphorus (included in lubricant oil) accumulates in the catalyst washcoat by the long-distance run of the vehicle, the exhaust-gas purification performance of the three-way catalyst decreases substantially. An extensive experiment was conducted to elucidate that mechanism. As a result of XRD analysis, it was clarified that Phosphorus and Cerium (included in oxygen storage components) formed CePO₄ after the severe aging. Some collapse of the CeO₂-ZrO₂ structures by CePO₄ formation causes the degradation of oxygen storage capacity (OSC) which affects NOₓ conversion efficiency. Furthermore, the addition of phosphorus trapper materials into the top catalyst layer demonstrated the suppression of the purification performance deterioration.車両の長距離走行により、リンが三元触媒層に多く堆積すると触媒性能が低下する。これは、リンと酸素吸蔵材中のCeがCePO₄を形成し、CeO₂-ZrO₂構造の部分崩壊に起因することがわかった。また、触媒の上層にリントラップ材を添加することで、下層へのリン侵入量を低減し、排ガス浄化性能の低下を抑制できた。

• Record URL:
  • https://doi.org/10.11351/jsaeronbun.49.1217
• Record URL:
  • http://scholar.google.com/scholar_lookup?title=Catalytic%20Technologies%20for%20the%20Suppression%20of%20Phosphorus%20Poisoning%20on%20the%20Three-way%20Catalysts&author=K.%20Tanabashi&author=R.%20Sato&author=M.%20Ogawa&author=K.%20Iwachido&publication_year=2018
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Tanabashi, Koki
  • Sato, Ryosuke
  • Ogawa, Makoto
  • Iwachido, Kinichi
• Publication Date: 2018-11

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 1217-1222
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 49
  • Issue Number: 6
  • 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: Catalyst poisoning; Catalysts; Chemical composition; Deterioration; Exhaust gases; Nitrogen oxides; Phosphorus
• Uncontrolled Terms: Cerium oxides
• Subject Areas: Environment; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01689615
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Dec 21 2018 11:12AM