Calcium carbonate sorbent and methods of making and using same

Details Calcium carbonate sorbent and methods of making and using same Calcium carbonate sorbent and methods of making and using same

1996-01-10

1998-07-14

Caldarola, Glenn

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423430, 423432, 423165, 210688, 502400, 502183, 502340, 502514, B01J 800, B01J 2000, C02F 142

Patent

active

057794642

ABSTRACT:
A novel CaCO.sub.3 sorbent with its physical properties tailored for high SO.sub.2 removal is produced in accordance with the present invention. The surface area, porosity and the distribution of pore sizes of the sorbent have been designed and controlled to give rise to the optimum internal structure necessary for high SO.sub.2 removal. The CaCO.sub.3 sorbent possesses 60 m.sup.2 /g surface area and 0.18 cc/g pore volume and exhibits extraordinary reactivity towards SO.sub.2 (70% utilization in 530 milliseconds at 1080.degree. C. and 3900 ppm SO.sub.2 concentration) when compared with other carbonate and hydrate sorbents in our laboratory reactor system. The sorbent may be produced by precipitation in a slurry bubble column reactor system and preferably contains about 2% by weight of a surfactant which is added during its preparation and improves the properties of CaCO.sub.3 in the course of precipitation. The high utilization of this tailored CaCO.sub.3 sorbent makes it a very strong potential sorbent for dry sorbent injection technology.

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