Effect of storage conditions on handling and SO2 reactivity of CA(OH)2-based sorbents

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5813791

Jozewicz, W; Gullett, B K

The article gives results of an investigation of the effect of relative humidity (RH), time, and aeration during calcium hydroxide--Ca(OH)2--storage for its effect on sorbent handling and reactivity with sulfur dioxide (SO2). Investigated was the effect of sorbent storage conditions of time (1-24 hr), RH (zero-90%), silo wall material, and aeration on handling properties of flowability and floodability and their subsequent effect on sorbent/SO2 reactivity. Increased RH in the storage chamber and prolonged storage increased floodability, as predicted by the angle of difference. No significant effect of RH on the flowability of Ca(OH)2, as predicted by the angle of repose, was detected. The importance of silo wall material on proper sorbent discharge pattern has been demonstrated through testing on four common surfaces. The effect of sorbent storage conditions on the reactivity of Ca(OH)2 with SO2 was evaluated in a short time differential reactor (STDR)operated under conditions typical of dry sorbent injection for SO2 control near the preheater. Increased RH and aeration with air during storage resulted in decreased reactivity of Ca(OH)2 with SO2. The effect of storage conditions on handling of novel Ca(OH)2-based sorbents for the removal of SO2 was also evaluated. ADVACATE sorbent appears to have significantly better handling properties than the other sorbents tested.

• Research Organization: Acurex Corp., Research Triangle Park, NC (United States)
• OSTI ID: 5813791
• Report Number(s): PB-92-124270/XAB; CNN: EPA-68-02-4701
• Resource Relation: Other Information: Pub. in Zement-Kalk-Gips International, n5 p242-247 1991. See also PB89-172159, PB89-127167 and PB89-208920. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CALCIUM HYDROXIDES
SORPTIVE PROPERTIES
SULFUR DIOXIDE
CHEMICAL REACTIONS
AERATION
AIR POLLUTION CONTROL
HUMIDITY
MATERIALS HANDLING
PERFORMANCE TESTING
STORAGE
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
CONTROL
HYDROGEN COMPOUNDS
HYDROXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
TESTING
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)