Engine emissions encapsulation in asphalt

Patent metadata

Field	Value
Publication number	US-12331471-B2
Application number	US-202217688998-A
Country	US
Kind code	B2
Filing date	Mar 8, 2022
Priority date	Mar 8, 2022
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The present disclosure includes various methods systems and apparatuses for carbon dioxide capture and utilization such as for encapsulation in asphalt. For example, a method can include combusting fuel to generate a flow of exhaust from a working machine operating to perform one or more asphalt related tasks, capturing CO2 from the exhaust, storing the CO2 in a storage unit onboard the working machine, forming asphalt that includes an amount of the CO2 from the storage unit by selectively mixing the amount of the CO2 from the storage unit with calcium, and using the asphalt that is formed that includes the amount of the CO2 from the storage unit encapsulated therein at a jobsite.

First claim

What is claimed is:

1. A method comprising:
combusting fuel to generate a flow of exhaust from a working machine operating to perform one or more asphalt related tasks;
capturing CO 2 from the exhaust;
storing the CO 2 in a storage unit onboard the working machine;
forming asphalt that includes an amount of the CO 2 from the storage unit by selectively mixing the amount of the CO 2 from the storage unit with calcium; and
using the asphalt that is formed that includes the amount of the CO 2 from the storage unit encapsulated therein at a jobsite.

2. The method of claim 1 , wherein the working machine is a paving machine and forming the asphalt and using the asphalt is performed onboard the paving machine.

3. The method of claim 1 , wherein the working machine includes a plurality of working machines performing the one or more asphalt related tasks including two or more of laying asphalt, removing asphalt, reclaiming asphalt, compacting asphalt, compacting soil and rolling asphalt.

4. The method of claim 1 , further comprising removing the CO 2 from the storage unit and transporting the CO 2 to one or more of an asphalt production plant, a paving machine, or a second storage unit at the jobsite.

5. The method of claim 1 , wherein capturing CO 2 from the exhaust is with an engine emissions system onboard the working machine.

6. The method of claim 1 , further comprising removing the storage unit from the working machine and transporting the storage unit to an asphalt production plant to perform the forming the asphalt.

7. The method of claim 6 , further comprising transporting the storage unit and the asphalt back to the jobsite for use including reuse of the storage unit onboard the working machine.

8. A CO 2 capture and utilization system, the system comprising:
a plurality of working machines configured to perform one or more asphalt related tasks at a jobsite including laying asphalt on one or more surfaces, wherein one or more of the plurality of working machines include an onboard storage unit configured to store CO 2 that results from combustion of fuel to operate the one or more of the plurality of working machines;
a control system configured to control mixing of an amount of the CO 2 from the storage unit with calcium; and
an asphalt mixing chamber configured to form asphalt from the mixing of the amount of the CO 2 and the calcium, one or more aggregates and asphalt cement.

9. The system of claim 8 , wherein the control system and the asphalt mixing chamber are onboard a paving machine that is one of the plurality of working machines.

10. The system of claim 8 , wherein the plurality of working machines performing the one or more asphalt related tasks further includes removing asphalt, reclaiming asphalt, compacting asphalt, compacting soil, hauling asphalt and rolling asphalt.

11. The system of claim 8 , wherein each of the plurality of working machines has its own storage unit.

12. The system of claim 8 , wherein the one or more of the plurality of working machines has an engine emissions system configured to capture the CO 2 from exhaust of an engine that powers the one or more of the plurality of working machines.

13. The system of claim 8 , wherein the control system and the asphalt mixing chamber are at an asphalt production plant, and wherein the CO 2 is removable from the storage unit of the one or more of the plurality of working machines and is transportable to the asphalt production plant.

14. The system of claim 13 , wherein the storage unit is removable from the one or more of the plurality of working machines and is transportable to the asphalt production plant, and wherein at least one of the plurality of working machines is configured to transport the storage unit or the formed asphalt back to the jobsite from the asphalt production plant.

15. A paving machine comprising:
an internal combustion engine configured to combust fuel to produce power and generate a flow of exhaust;
one or more motive apparatuses driven by the power produced by the internal combustion engine to move the paving machine along a surface of a jobsite;
an engine emissions system configured to capture CO 2 from the exhaust;
a storage unit configured to store CO 2 ;
a control system configured to control mixing of an amount of the CO 2 from the storage unit with calcium; and
an asphalt mixing chamber configured to form asphalt from the mixing of the amount of the CO 2 and the calcium, one or more aggregates and asphalt cement.

16. The paving machine of claim 15 , further comprising a screed assembly coupled to the paving machine and configured to spread asphalt.

17. The paving machine of claim 15 , wherein the control system and the asphalt mixing chamber are located onboard the paving machine.

18. The paving machine of claim 15 , wherein the control system and the asphalt mixing chamber are at an asphalt production plant, and wherein the CO 2 is removable from the storage unit of the paving machine and is transportable to the asphalt production plant.

19. The paving machine of claim 18 , wherein the storage unit is removable from the paving machine and is transportable to the asphalt production plant.

Assignees

• Caterpillar Paving Products Inc

Inventors

• Nagel Brian D

Classifications

• C04B2111/00019

  Carbon dioxide sequestration · CPC title

• Y02P40/18

  Carbon capture and storage [CCS] · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• F01N3/0857 Primary

  Carbon oxides · CPC title

• F01N2570/10

  Carbon or carbon oxides · CPC title