Carbon-negative metallurgical products

Patent metadata

Field	Value
Publication number	US-12398435-B2
Application number	US-202318362470-A
Country	US
Kind code	B2
Filing date	Jul 31, 2023
Priority date	Feb 18, 2021
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

Some variations provide a carbon-negative carbon product that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product, wherein the carbon-negative carbon product contains at least about 50 wt % carbon. In some embodiments, the carbon intensity is less than −500 kg CO 2 e per metric ton of the carbon-negative carbon product. Other variations provide a carbon-negative metal product (e.g., a steel product) that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative metal product, wherein the metal product contains from 50 wt % to 100 wt % of one or more metals and optionally one or more alloying elements. In some embodiments, the carbon-negative metal product is characterized by a carbon intensity less than −200 kg CO 2 e per metric ton of the carbon-negative metal product. The carbon-negative metal product can contain a wide variety of metals.

First claim

What is claimed is:

1. A carbon-negative metal product that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative metal product, wherein the carbon-negative metal product comprises from at least about 50 wt % to at most about 100 wt % of a metal and an alloying element;
wherein the alloying element comprises hydrogen.

2. The carbon-negative metal product of claim 1 , wherein the hydrogen is derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

3. The carbon-negative metal product of claim 1 , wherein the alloying element comprises nitrogen.

4. The carbon-negative metal product of claim 3 , wherein the nitrogen is derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

5. The carbon-negative metal product of claim 1 , wherein the alloying element comprises oxygen.

6. The carbon-negative metal product of claim 5 , wherein the oxygen is derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

7. The carbon-negative metal product of claim 1 , wherein the alloying element comprises sulfur.

8. The carbon-negative metal product of claim 7 , wherein the sulfur is derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

9. The carbon-negative metal product of claim 1 , wherein the alloying element comprises phosphorus.

10. The carbon-negative metal product of claim 9 , wherein the phosphorus is derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

Assignees

• Carbon Tech Holdings Llc

Inventors

• Mennell James A
• Daugaard Daren
• Slack Dustin

Classifications

• C21C5/00

  Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel} · CPC title

• C22C38/00 Primary

  Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title

• C22B1/2406

  pelletizing · CPC title

• C22B1/244

  organic · CPC title

• C10L2290/20

  Coating of a fuel as a whole or of a fuel component · CPC title