NiCeOx aerogels for methane suppression in the water-gas shift reaction

Patent metadata

Field	Value
Publication number	US-12337302-B2
Application number	US-202418820823-A
Country	US
Kind code	B2
Filing date	Aug 30, 2024
Priority date	Aug 30, 2023
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

An oxide-based aerogel having cerium and nickel may be used as a water-gas shift reaction catalyst without producing methane as a byproduct. It may be made by forming a gel from a cerium salt and a nickel salt solution and converting the gel to an aerogel.

First claim

What is claimed is:

1. A composition comprising:
an oxide-based aerogel comprising cerium and nickel;
wherein the nickel atoms are atomically dispersed in the aerogel.

2. The composition of claim 1 , wherein the at % of nickel relative to cerium is from 1 at % to 15 at %.

3. The composition of claim 1 , wherein at least 50% of the nickel atoms are not adjacent to each other.

4. The composition of claim 1 , wherein at least 90% of the nickel atoms are not adjacent to each other.

5. A method comprising:
providing the composition of claim 1 ;
flowing a feed gas comprising water and carbon monoxide over the composition; and
performing a water-gas shift reaction.

6. The method of claim 5 , wherein the water-gas shift reaction does not produce methane.

7. The method of claim 5 , wherein the water-gas shift reaction converts at least 90% of the carbon monoxide to carbon dioxide.

8. A method comprising:
providing a solution comprising a cerium salt and a nickel salt;
forming an oxide-based gel comprising cerium, nickel, and oxygen from the solution; and
converting the gel to an aerogel;
wherein the nickel atoms are atomically dispersed in the aerogel.

9. The method of claim 8 , wherein the at % of nickel relative to cerium in the aerogel is from 1 at % to 15 at %.

10. The method of claim 8 , wherein at least 50% of the nickel atoms are not adjacent to each other.

11. The method of claim 8 , wherein at least 90% of the nickel atoms are not adjacent to each other.

Assignees

• Us Gov Sec Navy

Inventors

• Novak Travis G
• Buck Matthew R
• Desario Paul A
• Rolison Debra R

Classifications

• C01P2006/17

  Pore diameter distribution · CPC title

• C01B2203/1029

  Catalysts in the form of a foam · CPC title

• C01B2203/0283

  containing a CO-shift step, i.e. a water gas shift step · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title