Back to results
US 5,174,974 AGranted
Regenerable CO.sub.2 /H.sub.2 O solid sorbent
AssigneeUnited Technologies Corporation
InventorsPhilip J. Birbara, Timothy A. Nalette
Life of this patent
Estimating the term…
Abstract
This invention relates to a CO.sub.2 /H.sub.2 O sorbent comprised of silver oxide, a CO.sub.2 sorption promoter, and a support. Preparation of this sorbent consists of impregnating the support with a silver compound, converting the silver compound to silver carbonate or silver oxide, and further impregnating the support with a CO.sub.2 sorption promoter. Prior to use as a sorbent, the silver carbonate is converted to silver oxide via the application of heat; liberating CO.sub.2 and H.sub.2 O.
Claims5
A method for removing CO.sub.2 and H.sub.2 O from a gaseous stream, comprising the steps of:
- a. contacting a gaseous stream containing CO.sub.2 and H.sub.2 O with a CO.sub.2 and H.sub.2 O sorbent prepared by a process comprising the steps of:
- i. preparing an aqueous solution of a silver compound;
- ii. impregnating a support with said aqueous solution to form an impregnated support;
- iii. reacting said silver compound with an alkali metal compound to convert said silver compound to an insoluble silver compound;
- iv. washing said impregnated support;
- v. preparing an aqueous solution of a CO.sub.2 sorption promoter, wherein said CO.sub.2 sorption promotor has a pH of at least 11;
- vi. further impregnating said impregnated support with said aqueous solution of CO.sub.2 sorption promoter;
- vii. drying said further impregnated support;
- and
- viii. converting said insoluble silver compound to silver oxide;
- b. absorbing said CO.sub.2 and said H.sub.2 O into said sorbent.
8 more elements
Dependencies are inferred from the claim text.