Simultaneous high efficiency capture of CO2 and H2S from pressurized gas
US9463416B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 2012 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Apr 13, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Low-cost and energy-efficient CO2 and H2S capture is provided obtaining greater than 99.9% capture efficiency from pressurized gas. The acid species are captured in an ammonia solution, which is then regenerated by stripping the absorbed species. The solution can capture as much as 330 grams of CO2 and H2S per 1000 gram of water and when regenerated it produces pure pressurized acid gas containing more than 99.7% CO2 and H2S. The absorption of the acid species is accomplished in two absorbers in-series, each having multiple stages. More than 95% of the acid species are captured in the first absorber and the balance is captured in the second absorber to below 10 ppm concentration in the outlet gas. The two absorbers operate at temperatures ranging from 20-70 degrees Celsius. The two absorbers and the main stripper of the alkaline solution operate at similar pressures ranging from 5-200 bara.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.