Carbon dioxide adsorbents containing magnesium oxide suitable for use at high temperatures
- Allentown, PA
- Macungie, PA
Adsorption of carbon dioxide from gas streams at temperatures in the range of 300 to 500.degree. C. is carried out with a solid adsorbent containing magnesium oxide, preferably promoted with an alkali metal carbonate or bicarbonate so that the atomic ratio of alkali metal to magnesium is in the range of 0.006 to 2.60. Preferred adsorbents are made from the precipitate formed on addition of alkali metal and carbonate ions to an aqueous solution of a magnesium salt. Atomic ratios of alkali metal to magnesium can be adjusted by washing the precipitate with water. Low surface area adsorbents can be made by dehydration and CO.sub.2 removal of magnesium hydroxycarbonate, with or without alkali metal promotion. The process is especially valuable in pressure swing adsorption operations.
- Research Organization:
- Air Products and Chemicals, Inc. (Allentown, PA)
- DOE Contract Number:
- FC36-95GO10059
- Assignee:
- Air Products and Chemicals, Inc. (Allentown, PA)
- Patent Number(s):
- US 6280503
- OSTI ID:
- 873949
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for extracting and sequestering carbon dioxide
Carbon dioxide pressure swing adsorption process using modified alumina adsorbents
Related Subjects
006
300
500
60
addition
adjusted
adsorbent
adsorbents
adsorption
alkali
alkali metal
aqueous
aqueous solution
atomic
atomic ratio
bicarbonate
carbon
carbon dioxide
carbonate
carried
containing
containing magnesium
degree
dehydration
dioxide
especially
especially valuable
formed
gas
gas stream
gas streams
hydroxycarbonate
magnesium
magnesium oxide
metal
metal carbon
metal carbonate
operations
oxide
oxide suitable
precipitate
preferably
preferred
pressure
pressure swing
process
promoted
promotion
range
ratio
ratios
removal
salt
solid
solid adsorbent
solution
sorbent containing
streams
suitable
surface
swing
swing adsorption
temperatures
valuable
washing
water