Method for separating CO2 from waste gases, converting it to CH4 and storing same
US6664101B2 · kind B2 · utility
6Cited by
4References
6Claims
0Family size
Inventor
Key dates
| Filing date | Dec 15, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Dec 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
CO2 is separated from waste gases by known technical methods and stored in underground cavities. By additions to the CO2, according to the invention, of H2 or NH3, methanogenic bacteria, bacteria substrate, catalysators and/or inhibitors the CO2 is reduced during the underground storage to CH4. The storage is possible in aquifer, natural gas reservoirs or oil and/or gas generating rock formations. Due to the equal volumes of CO2 and CH4 the process is a closed cycle and of constant pressure. Natural gas becomes a renewable energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.