IP Library › Granted Patent US 12,692,152
Granted Patent B2
US 12,692,152 · App. 18/480,174 · Granted Jul 28, 2026

Method for making low carbon intensity hydrogen

Inventor: Brian Foody (Ottawa, CA)
Assignee: Iogen Corporation
C01B3/26C01B2203/0233C01B2203/0475C01B2203/1241C01B2203/86
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Quick Facts
Patent No.
US 12,692,152
App. No.
18/480,174
Filed
Oct 3, 2023
Granted
Jul 28, 2026
Kind
B2
Examiner
QIAN, YUN
Art Unit
1738
USPC
423/650
Abstract

The present disclosure provides a method for reducing the carbon intensity of hydrogen by replacing, at a hydrogen production facility, a fraction of a non-renewable gaseous feedstock with a biomethane feedstock, wherein the non-renewable gaseous feedstock replaced is (a) a feedstock fed to methane reforming and/or (b) a feedstock used to generate heat for the reforming in the hydrogen production, and wherein the fraction of the non-renewable gaseous feedstock replaced by the biomethane feedstock is less than 50% and is at least r defined by Equation A herein. The disclosed process for reducing the carbon intensity of hydrogen is designed to reduce greenhouse gas (GHG) emissions and mitigate climate change. The biomethane feedstock in some examples has a carbon intensity (CI) value within a range that is between 15 g CO 2 eq/MJ and −500 g CO 2 eq/MJ.

Claims (154)

1 . A process of producing hydrogen that meets a target carbon intensity (CI T ), the process comprising:

at a facility that produces hydrogen by reforming non-renewable gaseous feedstock, replacing a fraction of the non-renewable gaseous feedstock with biomethane feedstock and obtaining hydrogen that meets the CI T ,

wherein the non-renewable gaseous feedstock that is replaced is (a) feedstock fed to methane reforming, (b) feedstock used to generate heat for the reforming, or (c) a combination of (a) and (b),

wherein the CI T reflects a lifecycle greenhouse gas (GHG) emissions reduction that is at least 70% relative to when the hydrogen is produced using only the non-renewable gaseous feedstock,

wherein the biomethane feedstock has a carbon intensity (CI) value within a range that is between 15 g CO 2 eq/MJ and −500 g CO 2 eq/MJ, said CI value obtained at least in part by one or any combination of:

(a) capturing and sequestering carbon dioxide generated from an anaerobic digestion or gasification that formed the biomethane feedstock;

(b) capturing and sequestering carbon from residue of the anaerobic digestion or gasification that formed the biomethane feedstock;

(c) using a renewable energy source to at least partially power a production process for producing the biomethane feedstock; and

(d) processing waste and avoiding emissions of methane to atmosphere that would otherwise have been released without production and collection of the biomethane feedstock, and

wherein the fraction of the non-renewable gaseous feedstock that is replaced by the biomethane feedstock is (i) less than 50% and (ii) at least r, where r is determined by the following Equation A:

r

=

(

CI

i

-

CI

T

-

k

-

C

r

)

(

CI

NRGF

-

CI

B

)

·

y

Equation

⁢

A

wherein the CI values CI i , CI T , CI NRGF , and CI B of Equation A are expressed in g CO 2 eq/MJ,

CI i =a carbon intensity of the hydrogen when it is assumed that the hydrogen is produced using only non-renewable gaseous feedstock and without accounting for any reductions in CI due to carbon capture and sequestration and without accounting for any reductions in CI due to the use of renewable power,

CI T =the target carbon intensity of the hydrogen to be produced in the facility,

k=net amount of carbon dioxide captured and sequestered per unit of hydrogen produced in g CO 2 eq/MJ associated with hydrogen production, and wherein k is zero when no carbon dioxide is captured and sequestered,

C r =carbon dioxide emissions reduction per unit of hydrogen produced in g CO 2 eq/MJ attributable to using renewable power in or associated with hydrogen production,

CI NRGF =the carbon intensity of the non-renewable gaseous feedstock (NRGF) fed to the facility,

CI B =carbon intensity of biomethane feedstock fed to the facility, and

y=a ratio of energy of the hydrogen produced in MJ to the sum of energy of the non-renewable gaseous feedstock in MJ and energy of the biomethane feedstock in MJ.

2 . The process of claim 1 , wherein at least some carbon dioxide produced at the facility is provided for sequestration.

3 . The process of claim 1 , further comprising obtaining one or more credits for said hydrogen that meets the CI T , for producing said hydrogen that meets the CI T , or a combination thereof.

4 . The process of claim 1 , wherein the CI T reflects a lifecycle GHG reduction that is at least 75% relative to when the hydrogen is produced using only the non-renewable gaseous feedstock.

5 . The process of claim 1 , wherein the CI T reflects a lifecycle GHG reduction that is at least 80% relative to when the hydrogen is produced using only the non-renewable gaseous feedstock.

6 . The process of claim 5 , wherein the fraction of non-renewable gaseous feedstock replaced by the biomethane feedstock is less than 40%.

7 . The process of claim 5 , wherein the fraction of non-renewable gaseous feedstock replaced by the biomethane feedstock is less than 25%.

8 . The process of claim 1 , wherein the CI value of the biomethane feedstock is a negative value.

9 . The process of claim 1 , wherein the biomethane feedstock is formed from the anaerobic digestion, and wherein the value of the CI of the biomethane feedstock is due at least in part to the capturing and sequestering carbon dioxide generated from the anaerobic digestion.

10 . The process of claim 8 , wherein the negative value of the CI of the biomethane feedstock is due at least in part to at least two of:

a) capturing and sequestering of carbon dioxide generated from an anaerobic digestion or gasification that formed the biomethane feedstock;

b) capturing and sequestering carbon from residue of the anaerobic digestion or gasification that formed the biomethane feedstock;

c) using the renewable energy source to power a production process for producing or upgrading the biomethane feedstock; and

d) processing waste and avoiding emissions of methane to atmosphere that would otherwise have been released without production and collection of the biomethane feedstock.

11 . The process of claim 8 , wherein the negative value of the CI of the biomethane feedstock is due at least in part to at least three of:

a) capturing and sequestering of carbon dioxide generated from an anaerobic digestion or gasification that formed the biomethane feedstock;

b) capturing and sequestering carbon from residue of the anaerobic digestion or gasification that formed the biomethane feedstock;

c) using the renewable energy source to power a production process for producing or upgrading the biomethane feedstock; and

d) processing waste and avoiding emissions of methane to atmosphere that would otherwise have been released without production and collection of the biomethane feedstock.

12 . The process of claim 8 , wherein the CI value of the biomethane feedstock is between −25 g CO 2 eq/MJ and −300 g CO 2 eq/MJ.

13 . The process of claim 8 , wherein the CI value of the biomethane feedstock is between −50 g CO 2 eq/MJ and −250 g CO 2 eq/MJ.

14 . The process of claim 8 , wherein the CI value of the biomethane feedstock is between −75 gCO 2 eq/MJ and −250 g CO 2 eq/MJ.

15 . The process of claim 1 , wherein the biomethane feedstock is derived at least in part from biomass that is livestock manure, food scrap waste, or a combination thereof.

16 . The process of claim 1 , wherein said replacing comprises replacing the non-renewable gaseous feedstock fed to methane reforming with the biomethane feedstock.

17 . The process of claim 1 , wherein the non-renewable gaseous feedstock comprises natural gas, refinery gas, liquid petroleum gas (LPG), light naphtha, heavy naphtha and/or straight-run naphtha.

18 . A process for producing hydrogen that meets a target carbon intensity (CI T ), the process comprising:

(i) introducing biomethane feedstock into a facility that produces the hydrogen by reforming, the biomethane feedstock having a carbon intensity (CI) value within a range that is between 15 g CO 2 eq/MJ and −500 g CO 2 eq/MJ;

(ii) replacing, at the facility, a fraction of the non-renewable gaseous feedstock with the biomethane feedstock,

wherein the non-renewable gaseous feedstock replaced is (a) feedstock fed to methane reforming, (b) feedstock used to generate heat for the reforming in the hydrogen production, or c) a combination of a) and b),

and wherein the fraction of the non-renewable gaseous feedstock replaced by the biomethane feedstock is less than 30%;

(iii) obtaining the CI T of the hydrogen by at least:

selecting an amount of the non-renewable gaseous feedstock to be replaced represented by r,

wherein r is the fraction of the non-renewable gaseous feedstock replaced by the biomethane feedstock and wherein r is determined by the following Equation A:

r

=

(

CI

i

-

CI

T

-

k

-

C

r

)

(

CI

NRGF

-

CI

B

)

·

y

Equation

⁢

A

wherein the CI values CI i , CI T , CI NRGF , and CI B of Equation A are expressed in g CO 2 eq/MJ,

CI i =a carbon intensity of the hydrogen when it is assumed that the hydrogen is produced using only non-renewable gaseous feedstock and without accounting for any reductions in CI due to carbon capture and sequestration and without accounting for any reductions in CI due to the use of renewable power,

CI T =the target carbon intensity of the hydrogen to be produced in the facility,

k=net amount of carbon dioxide captured and sequestered per unit of hydrogen produced in g CO 2 eq/MJ associated with hydrogen production, and wherein k is zero when no carbon dioxide is captured and sequestered,

C r =carbon dioxide emissions reduction per unit of hydrogen produced in g CO 2 eq/MJ attributable to using renewable power in or associated with hydrogen production,

CI NRGF =the carbon intensity of the non-renewable gaseous feedstock (NRGF) fed to the facility,

CI B =carbon intensity of biomethane feedstock fed to the facility, and

y=a ratio of energy of the hydrogen produced in MJ to the sum of energy of the non-renewable gaseous feedstock in MJ and the energy of the biomethane feedstock in MJ; and

(iv) obtaining the hydrogen that meets the CI T , wherein the hydrogen so obtained has at least a 70% reduction in carbon emissions relative to the facility using only the non-renewable gaseous feedstock.

19 . A process of producing hydrogen that meets a target carbon intensity (CI T ), the process comprising:

providing biomethane feedstock to a facility that produces hydrogen by reforming non-renewable gaseous feedstock, the biomethane feedstock having a CI value within a range that is between 15 g CO 2 eq/MJ and −500 g CO 2 eq/MJ, said CI value obtained at least in part by one or any combination of:

(a) capturing and sequestering carbon dioxide generated from an anaerobic digestion or gasification that formed the biomethane feedstock;

(b) capturing and sequestering carbon from a residue of the anaerobic digestion or gasification that formed the biomethane feedstock;

(c) using a renewable energy source to at least partially power a production process for producing the biomethane feedstock; and

(d) processing waste and avoiding emissions of methane to atmosphere that would otherwise have been released without production and collection of the biomethane feedstock;

wherein the biomethane feedstock is provided in an amount selected to replace a fraction of the non-renewable gaseous feedstock with the biomethane feedstock and obtain the hydrogen that meets the CI T , wherein the non-renewable gaseous feedstock replaced is (a) feedstock fed to methane reforming, (b) feedstock used to generate heat for the reforming, or (c) a combination of (a) and (b), wherein the fraction of the non-renewable gaseous feedstock replaced by the biomethane feedstock is less than 50%, and

wherein the fraction of the non-renewable gaseous feedstock replaced by the biomethane feedstock is at least r, where r is determined by the following Equation A:

r

=

(

CI

i

-

CI

T

-

k

-

C

r

)

(

CI

NRGF

-

CI

B

)

·

y

Equation

⁢

A

wherein the CI values CI i , CI T , CI NRGF , and CI B of Equation A are expressed in g CO 2 eq/MJ,

CI i =a carbon intensity of the hydrogen when it is assumed that the hydrogen is produced using only non-renewable gaseous feedstock and without accounting for any reductions in CI due to carbon capture and sequestration and without accounting for any reductions in CI due to the use of renewable power,

CI T =the target carbon intensity of the hydrogen to be produced in the facility,

k=net amount of carbon dioxide captured and sequestered per unit of hydrogen produced in g CO 2 eq/MJ associated with hydrogen production, and wherein k is zero when no carbon dioxide is captured and sequestered,

C r =carbon dioxide emissions reduction per unit of hydrogen produced in g CO 2 eq/MJ attributable to using renewable power in or associated with hydrogen production,

CI NRGF =the carbon intensity of the non-renewable gaseous feedstock (NRGF) fed to the facility,

CI B =carbon intensity of biomethane feedstock fed to the facility, and

y=a ratio of energy of the hydrogen produced in MJ to the sum of energy of the non-renewable gaseous feedstock in MJ and the biomethane feedstock in MJ; and

wherein the hydrogen obtained that meets the CI T has at least a 70% reduction in carbon emissions relative to the hydrogen produced using only the non-renewable gaseous feedstock.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 3, 2023
From: FOODY, BRIAN
To: IOGEN CORPORATION
Reel/Frame 065111/0842 →
Continuity (3)
Continuation 18162950 · Feb 1, 2023
Provisional Application 63362788 · Apr 11, 2022
Related Publication 20240025737A1 · Jan 25, 2024
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