Selection and preparation of activated carbon for fuel gas storage
US4960450A · kind A · utility
67Cited by
11References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/908
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Increasing the surface acidity of active carbons can lead to an increase in capacity for hydrogen adsorption. Increasing the surface basicity can facilitate methane adsorption. The treatment of carbons is most effective when the carbon source material is selected to have a low ash content i.e., below about 3%, and where the ash consists predominantly of alkali metals alkali earth, with only minimal amounts of transition metals and silicon. The carbon is washed in water or acid and then oxidized, e.g. in a stream of oxygen and an inert gas at an elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.