Back to results
US 6,271,172 B1Granted
Method for manufacturing a carbon dioxide gas absorbent
AssigneeKabushiki Kaisha Toshiba
InventorsToshiyuki Ohashi, Kazuaki Nakagawa, Hideyuki Ohzu, Yoshihiro Akasaka, Norihiro Tomimatsu
Life of this patent
Estimating the term…
Abstract
The carbon dioxide gas absorbent of the present invention exhibits a high carbon dioxide gas absorption performance from an initial stage of the use. The carbon dioxide gas absorbent comprises of primary particles each containing lithium zirconia serving as a matrix, and eutectic compound molecules each containing lithium carbonate and at least one element selected from the group consisting of alkali metals excluding lithium, and alkali earth metals, which are dispersed in the matrix.
Claims7
A method of preparing a carbonate gas absorbent, comprising:
- mixing a first raw material component and a second raw material component to form a powder mixture, wherein said first raw material component is a mixture of zirconia powder and lithium carbonate powder, and wherein said second raw material component is at least one material selected from the group consisting of (i) a powder of an oxide or a carbonate salt of an alkali metal except for lithium, and (ii) a powder of an oxide or a carbonate salt of an alkaline earth metal;
- and
- heating said powder mixture, wherein the heating causes the zirconia and the lithium carbonate to react to produce a lithium zirconia matrix and further causes remaining unreacted lithium carbonate to react with said alkali metal or alkaline earth metal oxide or carbonate, thereby forming a eutectic compound dispersed over the lithium zirconia matrix.
Dependencies are inferred from the claim text.