Mesoporous support-immobilized metal oxide-based nanoparticles

Patent metadata

Field	Value
Publication number	US-12350651-B2
Application number	US-202017636160-A
Country	US
Kind code	B2
Filing date	Aug 19, 2020
Priority date	Aug 19, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

Exemplary oxygen carrier particles may comprise a mesoporous support and a plurality of metal oxide-based nanoparticles immobilized on the mesoporous support. The plurality of metal oxide-based nanoparticles may comprise 10 volume percent to 80 volume percent of mesopores in the mesoporous support. A reactor may comprise a feedstock inlet in fluid communication with a carbonaceous feedstock source, a product stream outlet, and oxygen carrier particles. Exemplary reactors may be operated by providing a carbonaceous feedstock to an inlet of the reactor, providing oxygen carrier particles within the reactor, and collecting a product stream from an outlet of the reactor.

First claim

We claim:

1. An oxygen carrier, comprising:
a mesoporous silica support; and
a plurality of iron oxide-based nanoparticles immobilized on the mesoporous silica support,
wherein the plurality of iron oxide-based nanoparticles comprise 20 volume percent to 70 volume percent of mesopores in the mesoporous silica support;
wherein the plurality of iron oxide-based nanoparticles further comprise a dopant selected from: cobalt (Co), nickel (Ni), and copper (Cu).

2. The oxygen carrier according to claim 1 , wherein the plurality of iron oxide-based nanoparticles include Fe 2 O 3 .

3. The oxygen carrier according to claim 2 , wherein each of the plurality of iron oxide-based nanoparticles comprise 22 weight percent to 86 weight percent of the mesoporous silica support.

4. The oxygen carrier according to claim 1 , wherein the mesoporous silica support is Santa Barbara Amorphous-15 silica (SBA-15), Santa Barbara Amorphous-16 silica (SBA-16), mesoporous silica MCM-41, or mesoporous silica MCM-48.

5. The oxygen carrier according to claim 1 , wherein a portion of the plurality of iron oxide-based nanoparticles is immobilized on a first type of mesoporous silica support;
wherein a remainder portion of the plurality of iron oxide-based nanoparticles is immobilized on a second type of mesoporous silica support, the second type of mesoporous silica support being different from the first type of mesoporous silica support.

6. The oxygen carrier according to claim 1 , wherein the iron oxide-based nanoparticles have an average diameter of 2 nm to 50 nm;
wherein the mesoporous silica support has an average diameter of about 1 μm to about 4 μm; and
wherein the mesoporous silica support has an average pore diameter of about 2 nm to about 50 nm.

7. The oxygen carrier according to claim 1 , wherein a dopant concentration is 0.5 atomic percent (at %) to 15 at %.

8. The oxygen carrier according to claim 7 , wherein the dopant is copper.

9. A method of operating a reactor, the method comprising:
providing a carbonaceous feedstock to an inlet of the reactor;
providing oxygen carrier particles within the reactor, wherein each of the oxygen carrier particles comprises the oxygen carrier of claim 1 ; and
collecting a product stream from an outlet of the reactor, the product stream including at least one of: H 2 , carbon monoxide (CO), and C 2+ hydrocarbon.

10. The method according to claim 9 , further comprising arranging the reactor as a fixed bed, a moving bed, or a fluidized bed,
wherein the carbonaceous feedstock includes at least one of methane (CH 4 ), coal, carbon monoxide (CO), and carbon dioxide (CO 2 ).

11. The method according to claim 9 , further comprising:
after collecting the product stream, providing an oxidizing agent to the inlet of the reactor; and
collecting a second product stream from the outlet of the reactor, the second product stream including carbon monoxide (CO).

12. The method according to claim 9 , wherein the plurality of iron oxide-based nanoparticles include Fe 2 O 3 , ferrite, or combinations thereof; and
wherein the mesoporous silica support is mesoporous silica SBA-15, mesoporous silica SBA-16, or mesoporous silica MCM-41.

13. The method according to claim 9 , wherein the iron oxide-based nanoparticles further comprise a dopant selected from: Co, Ni, and Cu.

14. The method according to claim 9 , wherein a carbonaceous feedstock conversion rate is greater than 95%.

15. A reactor, comprising:
a feedstock inlet in fluid communication with a carbonaceous feedstock source;
a product stream outlet; and
oxygen carrier particles, wherein each of the oxygen carrier particles comprises the oxygen carrier of claim 1 .

16. The reactor according to claim 15 , wherein the plurality of iron oxide-based nanoparticles include Fe 2 O 3 , ferrite, or combinations thereof;
wherein the iron oxide-based nanoparticles have an average diameter of 2 nm to 10 nm;
wherein the mesoporous silica support has an average diameter of about 1 μm to about 4 μm; and
wherein the mesoporous silica support has an average pore diameter of about 6 nm to about 11 nm.

Assignees

• Ohio State Innovation Foundation

Inventors

• Fan Liang-Shih
• Liu Yan
• Qin Lang
• Cheng Zhuo

Classifications

• C01B3/42 Primary

  using moving solid particles, e.g. fluidised bed technique · CPC title

• B01J35/23

  in a colloidal state · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title