Pore-distribution changes of calcium-based sorbents reacting with sulfur dioxide

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5265372

Gullett, B K; Bruce, K R

This paper gives results of a determination of changes in the pore structure of calcium oxide sorbents derived from calcium carbonate (termed c-CaO) and calcium hydroxide (termed h-CaO) reacting with sulfur dioxide (SO/sub 2/). Results show that the pore shape of c-CaO approximates a cylinder, while that of h-CaO appears to be slit or plate-like. The pore volume of c-CaO is located in much smaller pores than that of h-CaO when compared on the basis of an equivalent geometric model. The effect of sintering was to reduce surface area through coalescence of smaller pores, while only minor effects were observed upon pore volume and conversion from CaO to calcium sulfate (CaSO/sub 4/). Both sorbents expand to allow greater reaction than is possible given the initial porosity and formation of a larger-volume product.

• Research Organization: Acurex Corp., Research Triangle Park, NC (USA)
• OSTI ID: 5265372
• Report Number(s): PB-88-185491/XAB
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ACID RAIN
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
ATMOSPHERIC PRECIPITATIONS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONATE ROCKS
CHALCOGENIDES
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FABRICATION
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OXYGEN COMPOUNDS
PARTICLES
POLLUTION ABATEMENT
POROSITY
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RAIN
ROCKS
SEDIMENTARY ROCKS
SINTERING
SORPTION
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
THERMAL POWER PLANTS