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Systems, methods and materials for NOx decomposition with metal oxide materials

  • US 10,549,236 B2
  • Filed: 01/29/2019
  • Issued: 02/04/2020
  • Est. Priority Date: 01/29/2018
  • Status: Active Grant
First Claim
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1. A method comprising:

  • contacting a first gaseous input stream comprising NOx with a metal oxide particle, whereupon the NOx in the first gaseous input stream reacts with the metal oxide particle to generate nitrogen (N2) gas and an oxidized metal oxide particle,wherein contacting the first gaseous input stream with the metal oxide particle occurs at a first temperature of from 400°

    C. to 700°

    C.;

    collecting a first gaseous product stream comprising substantially no NOx;

    contacting a second gaseous input stream comprising at least one sweeping gas with the oxidized metal oxide particle, whereupon the sweeping gas comprises oxygen (O2) gas after contacting the oxidized metal oxide particle and a reduced metal oxide particle is generated,wherein the at least one sweeping gas is oxygen (O2) gas free;

    wherein contacting the second gaseous input stream with the oxidized metal oxide particle occurs at a second temperature of from 600°

    C. to 1000°

    C.; and

    collecting a second gaseous product stream comprising the oxygen (O2) gas.

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