Microwave active metal oxides for CO2 dry reforming of methane

Patent metadata

Field	Value
Publication number	US-11981565-B2
Application number	US-202017079924-A
Country	US
Kind code	B2
Filing date	Oct 26, 2020
Priority date	Oct 25, 2019
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

One or more embodiments relates to compositions, method of using and methods of producing a gas mixture. The method includes supplying a composition La x Sr y Co z M w O 3 , where x ranges from 0.5 to 1, y ranges 0.0 to 1-x, z ranges from 0.1 to 1.0, and M is a dopant or dopants where w ranges from 0.0 to 1-z; and energizing the composition directly using electromagnetic energy to heat the composition to a temperature above 700° C. The method further includes contacting the composition with a reactant gas mixture comprising methane and an oxidant forming a product gaseous mixture.

First claim

What is claimed is:

1. A method of producing a gas mixture, the method comprising the steps of:
a. supplying a composition La x Sr y Co z M w O 3 , where x ranges from 0.5 to 1, y ranges 0.0 to 1-x, z ranges from 0.1 to 1.0, and M is at least one dopant where w ranges from 0.0 to 1-z, wherein M is an element selected from the group consisting of Mn, Fe, Ni, Cu, or a combination thereof;
b. energizing the composition directly using microwave energy to heat the composition to a temperature above 700° C.; and,
c. contacting the composition with a reactant gas mixture comprising methane and an oxidant forming a product gaseous mixture.

2. The method of claim 1 further comprising heating the composition at or above 800° C.

3. The method of claim 1 , where the oxidant comprises CO 2 .

4. The method of claim 1 , where the oxidant comprises a mixture of at least CO 2 and water.

5. The method of claim 1 , where the product gaseous mixture comprises hydrogen and carbon monoxide.

6. The method of claim 5 , where the reactant gaseous mixture is converted at least 50% to gaseous mixture with at least 50% selectivity to hydrogen and carbon monoxide.

7. The method of claim 6 , where the reactant gaseous mixture is converted at least 97% to gaseous mixture with at least 96% selectivity to hydrogen and carbon monoxide.

Assignees

• Us Energy

Inventors

• Kauffman Douglas R
• Lekse Jonathan W
• Marin Christopher Mark
• Popczun Eric J

Classifications

• B01J35/45

  Nanoparticles · CPC title

• C01B3/40 Primary

  characterised by the catalyst · CPC title

• B01J23/83 Primary

  with rare earths or actinides · CPC title

• B01J23/8892

  Manganese · CPC title

• C01G51/70

  containing rare earths, e.g. LaCoO3  (C01G51/68 takes precedence) · CPC title