Particulate absorbent materials
AssigneeCabot Corporation
InventorsMark J. Hampden-Smith, Paolina Atanassova, Jian-Ping Shen, James Brewster, Paul Napolitano, Agathagelos Kyrlidis
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Abstract
Solid absorbent materials that are useful for absorption of chemical species from a fluid, such as a gas stream or a liquid stream. The absorbent materials are formed by spray processing and posses a well-defined chemical composition and microstructure. The absorbent materials can have a high absorption capacity for a chemical species such as H2S, CO2, NOx, and H2 and have a high recylability, such that the chemical species can be absorbed and desorbed over a large number of cycles.
Claims55
A particulate absorbent material for the absorption of a chemical species from a fluid, wherein said absorbent material is fabricated by a process comprising the steps of:
- (a) providing a precursor solution comprising at least a first precursor to an absorbent compound selected from Group 1 and Group 2 metal oxides;
- (b) atomizing said precursor solution to form precursor droplets comprising said first precursor;
- (c) heating said precursor droplets remove liquid therefrom and form dried precursor droplets;
- and
- (d) converting said dried precursor droplets to a particulate absorbent material comprising said absorbent compound, wherein said particulate absorbent material is adapted to absorb CO2 and has a CO2 mass absorption capacity of at least about 20 grams CO2 per 100 grams unreacted absorbent material.
A particulate absorbent material adapted for the absorption of a chemical species from a fluid, wherein said particulate absorbent material comprises an intimate mixture of at least a first absorbent compound selected from Group 1 and Group 2 metal oxides and at least a first metal oxide inert additive that is different than said first absorbent compound, wherein said particulate absorbent material has a surface area of at least about 5 m2/g and wherein said particulate absorbent material comprises not greater than 50 wt. % metal oxide inert additives.
Dependencies are inferred from the claim text.