Production of hydrogen from underground coal gasification
US7431084B1 · kind B1 · utility
4Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2006 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Jan 22, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system of obtaining hydrogen from a coal seam by providing a production well that extends into the coal seam; positioning a conduit in the production well leaving an annulus between the conduit and the coal gasification production well, the conduit having a wall; closing the annulus at the lower end to seal it from the coal gasification cavity and the syngas; providing at least a portion of the wall with a bifunctional membrane that serves the dual purpose of providing a catalyzing reaction and selectively allowing hydrogen to pass through the wall and into the annulus; and producing the hydrogen through the annulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.