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US 4,937,059 AGranted
Absorption and desorption of carbon dioxide
AssigneePhillips Petroleum Company
InventorsJohn H. Kolts, James B. Kimble, Donald H. Kubicek
Life of this patent
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Abstract
A process for absorption and subsequent desorption of carbon dioxide comprises contacting a CO.sub.2 -containing gas with a solid sorbent comprising alkali metal oxide and/or hydroxide (preferably LiOH) and lanthanum oxide. The used solid sorbent can be regenerated by heating, so as to desorb absorbed carbon dioxide.
Claims15
A process for the separation and recovery of carbon dioxide comprising the steps of:
- (A) contacting (a) a gas mixture which comprises carbon dioxide with (b) a solid sorbent comprising (i) at least one compound selected from the group consisting of alkali metal oxides and alkali metal hydroxides and (ii) lanthanum oxide, under such conditions as to obtain (c) a gas product having a lower concentration of carbon dioxide than said gas mixture and (d) a solid sorbent containing absorbed carbon dioxide which has been removed from said gas mixture;
- (B) substantially separating said solid sorbent (d) from said gas product (c), so as to obtain a separated solid sorbent (d);
- and
- (C) heating said separated solid sorbent (d) under such conditions as to substantially desorb carbon dioxide contained in said solid sorbent (d) so as to obtain a regenerated solid sorbent.
1 more element
Dependencies are inferred from the claim text.