In-situ acid neutralization and carbon mineralization
US12172910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2024 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Mar 28, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An acid substance (e.g., HCl) generated as the byproduct of an ocean alkalinity enhancement (OAE) process is neutralized using an in-situ acid neutralization subsystem by forcing the acid byproduct through an alkaline formation such that the acid substance is neutralized through interaction with alkaline rocks as the acid byproduct flows from an injection well to a recovery well. A flow rate of acid substance through rock formation is optimized to (a) maximize the amount of neutralized acid substance, and (b) minimize the amount of residual acid substance at the recovery well. The acid flow rate is adjusted by mixing the acid byproduct with a buffer and/or by a flow control device. Acid neutralization and CO2 capture are combined by forcing CO2 through the alkaline formation to react with divalent ions generated by the acid neutralization process, thereby mineralizing the CO2 in the form of carbonate rocks (e.g., limestone or dolostone).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.