Production of pure hydrogen and synthesis gas or carbon with CUO-Fe2O3 oxygen carriers using chemical looping combustion and methane decomposition/reforming

Patent metadata

Field	Value
Publication number	US-10513436-B1
Application number	US-201615375692-A
Country	US
Kind code	B1
Filing date	Dec 12, 2016
Priority date	Dec 10, 2015
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

Methods, systems and apparatus relate to producing synthesis gas or carbon and hydrogen utilizing a reduced catalyst CuO—Fe 2 O 3 . The method comprises introducing CH 4 ; reducing the CuO—Fe 2 O 3 with the introduced CH 4 , yielding at least a reduced metal catalyst; oxidizing the reduced metal with O 2 yielding CuO—Fe 2 O 3 ; and generating heat that would be used for the hydrogen and carbon or syngas production with the reduced catalyst CuO—Fe 2 O 3 .

First claim

We claim:

1. A method for producing synthesis gas or carbon and hydrogen utilizing a reduced CuO—Fe 2 O 3 oxygen carrier, the method comprising:
introducing CH 4 to the CuO—Fe2O3 oxygen carrier;
reducing the CuO—Fe 2 O 3 oxygen carrier with the introduced CH 4 , yielding at least a reduced oxygen carrier;
introducing methane to a first portion of the reduced oxygen carrier, producing carbon and hydrogen by methane decomposition, wherein the reduced oxygen carrier acts as a catalyst for methane decomposition;
introducing steam to the first portion for the gasification of the carbon, thereby producing syngas; and
oxidizing a second portion of the reduced oxygen carrier with O 2 yielding CuO—Fe 2 O 3 ; and
generating heat from the oxidation reaction, wherein the heat is applied to the gasification reaction and the methane decomposition reaction.

2. The method of claim 1 , further comprising reducing the CuO—Fe 2 O 3 with the introduced CH 4 , yielding CO 2 and H 2 O in addition to the reduced oxygen carrier, wherein the CO 2 is sequestration ready.

3. The method of claim 2 , further comprising decomposing the CH 4 , yielding C and 2H 2 .

4. The method of claim 3 , further comprising gasifying the yielded C with steam, yielding CO and H 2 .

5. The method of claim 1 , further comprising steam reforming the CH 4 using the reduced oxygen carrier as a steam reforming catalyst.

6. The method in claim 1 , further comprising producing a concentrated CO 2 stream that is sequestration ready from the reduction of the oxygen carrier.

7. A method for producing synthesis gas or carbon and hydrogen, the method comprising:
reducing a CuO—Fe 2 O 3 oxygen carrier, yielding at least a reduced oxygen carrier and CO 2 , wherein the CO 2 is sequestration ready;
introducing methane;
producing carbon and hydrogen with the reduced oxygen carrier, wherein the reduced oxygen carrier acts as a catalyst for methane decomposition;
introducing steam to generate syngas by carbon gasification; and
generating heat by oxidation of the reduced oxygen carrier, wherein the heat is applied to the methane decomposition reaction and the gasification reaction.

8. The method of claim 7 , further comprising reducing the CuO—Fe 2 O 3 with CH 4 , yielding CO 2 and H 2 O in addition to the reduced oxygen carrier.

9. The method of claim 8 , further comprising decomposing the CH 4 , yielding C and 2H 2 .

10. The method of claim 9 , further comprising gasifying the yielded C with steam, yielding CO and H 2 .

11. The method of claim 7 , further comprising reforming an introduced CH 4 using the reduced oxygen carrier and steam, wherein the reduced oxygen carrier acts as a steam reforming catalyst.

Assignees

• Us Energy
• Us Dept Energy

Inventors

• Siriwardane Ranjani
• Tian Hanjing

Classifications

• C01B2203/1076

  Copper or zinc-based catalysts · CPC title

• C01B2203/0233

  the reforming step being a steam reforming step · CPC title

• C01B3/40 Primary

  characterised by the catalyst · CPC title

• C01B3/26

  using catalysts · CPC title

• C01B2203/1047

  Group VIII metal catalysts · CPC title