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APPLICATION OF SYNERGIZED-PGM WITH ULTRA-LOW PGM LOADINGS AS CLOSE-COUPLED THREE-WAY CATALYSTS FOR INTERNAL COMBUSTION ENGINES

  • US 20170328250A1
  • Filed: 05/04/2017
  • Published: 11/16/2017
  • Est. Priority Date: 05/12/2016
  • Status: Active Grant
First Claim
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1. A catalytic system for treating an exhaust stream of a combustion engine, comprisinga combustion engine;

  • a close-coupled catalytic converter configured to accept at least one exhaust gas stream from said combustion engine, the close-coupled catalytic converter comprising a synergized platinum group metal catalyst comprising a zero platinum group metal spinel catalyst composition and an ultra-low platinum group metal catalyst material, wherein the platinum group metal catalyst material has a platinum group metal concentration of about 1 g/ft3 to about 10 g/ft3; and

    an underfloor catalytic converter downstream of, and, in fluid communication with said close-coupled catalytic converter, the underfloor catalytic converter comprising a platinum group metal catalyst.

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