Method and apparatus for removing high concentration acid gas from natural gas
US9975079B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Apr 25, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A multi-stage process for recovering acid gas from natural gas having high acid gas contents utilizes two or more membrane absorption contactors arranged in series. The first membrane absorption contactor uses a physical solvent to remove a high volume of acid gas transferred across a membrane, and to reduce the acid gas content in the natural gas to a lower level that can be managed using chemical solvents. The second and, if needed, subsequent membrane absorption contactors can use a chemical solvent to remove acid gas transferred across the respective membranes and reduce the acid gas content in the natural gas to very low levels, if needed, depending on product specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.