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특허 상세정보

Catalyst and metal ferrites for reduction of hydrogen sulfide emissions from automobile exhaust

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B01J-021/04    B01J-023/10    B01J-023/40   
미국특허분류(USC) 502/303 ; 502/302 ; 502/324 ; 502/326
출원번호 US-0307649 (1989-02-07)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 15  인용 특허 : 6
초록

A catalyst, which is capable of controlling not only HC, CO and NOx, but also H2S emission from the tail pipe of catalytic converter automobiles, is made of platinum-group metals promoted by rare earth oxides and containing a metal ferrite. The ferrite is present in an H2S gettering amount and in an amount up to about 20 weight % of the catalyst. The catalyst comprises an alumina support and is applied as a washcoat to a substrate, such as a honeycomb monolith made from ceramic or metal.

대표
청구항

Automotive exhaust catalyst comprising a support carrying a catalytically effective amount of at least one platinum group metal and an H2S gettering amount of a metal ferrite having the formula MFe2O4, where M is Co, Ni, Cu, Zn, Mn, or Fe.

이 특허를 인용한 특허 피인용횟수: 15

  1. Geus, John Wilhelm; Ter?rde, Robert Johan Andreas Maria. Catalyst for the selective oxidation of sulfur compounds to elemental sulfur. USP2005076919296.
  2. Chellappa, Anand. Catalyst incorporation in a microreactor. USP2010067731918.
  3. Chellappa,Anand. Catalyst incorporation in a microreactor. USP2007057220699.
  4. Schneider Michael,DEX ; Kochloefl Karl,DEX ; Maletz Gerd J.,DEX ; Ladebeck Jurgen,DEX ; Heinisch Christoph,DEX. Chromium-free catalyst based on iron oxide for conversion of carbon monoxide. USP1998115830425.
  5. Manini Paolo,ITX ; Boffito Claudio,ITX. Combination of getter materials and device for containing the same. USP2001036200494.
  6. Knight Glen (P.O. Box 217 Pouch Cove ; Newfoundland CAX A0A 3L0). Combined muffler and catalytic converter exhaust unit. USP1991085043147.
  7. Murphy William L. ; Wilson Bruce A.. Method for forming a reactive medium. USP1998115829139.
  8. Pourkhalil, Mahnaz; Rashidi, Alimorad; Moghaddam, Abdolsammad Zarringhalam; Mohajeri, Mahdi; Mehri, Ali. Nano-hybrid catalyst for NOx removal. USP2016119498768.
  9. Gunugunuri, Krishna; Roberts, Charles Alexander; Peck, Torin C.. Potassium dispersed on spinel oxides as catalysts for direct NOx decomposition. USP20181210143966.
  10. Zahn Wolfgang,DEX ; Loose Gunter,DEX ; Hirshmann Axel,DEX. Process and apparatus for recoating a deactivated catalyst coating in a catalyst. USP2000086099644.
  11. Zahn Wolfgang,DEX ; Loose Gunter,DEX ; Hirshmann Axel,DEX. Process and apparatus for recoating a deactivated catalyst coating in a catalyst. USP1998105821187.
  12. Durand Daniel,FRX ; Mabilon Gil,FRX ; Guibard Isabelle,FRX. Process for preparing a catalyst suitable for the treatment of exhaust gases from internal combustion engines. USP1999105965481.
  13. Brown,Kurt E.; Murphy,William L.. Reactive media, methods of use and assemblies for purifying. USP2008127465692.
  14. Murphy William L. ; Wilson Bruce A.. Reactive medium for purifying fluids. USP2000056066591.
  15. Shadman Farhang F. (Tucson AZ). Reactive membrane for filtration and purification of gases of impurities and method utilizing the same. USP1997065637544.