Materials for the direct capture of carbon dioxide from atmospheric air
US11612879B2 · kind B2 · utility
4Cited by
5References
29Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 8, 2018 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Aug 24, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method to produce a particulate activated carbon material for capturing CO2 from air,wherein the particulate activated carbon is impregnated with alkali carbonate salt such as K2CO3; and wherein the impregnated particulate activated carbon either has, determined using nitrogen adsorption methods, a pore volume of at least 0.10 cm3/g for pore sizes of at least 5 nm and a pore volume of at most 0.30 cm3/g for pore sizes of less than 2 nm or is based on a mixture of different alkali carbonate salts, or has a particular pore surface for pore sizes in the range of 2 nm-50 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.