Desulfurization of flue gases in a fluidized bed of modified limestone

Journal Article · Sun Oct 01 04:00:00 EDT 1978 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1978.10470702· OSTI ID:6786289

Van Houte, G; Maon, J C

Bench-scale experiments were conducted on the dry removal of SO/sub 2/ from gases using commercial samples of powdered limestone activated by adding 2 mole Vertical Bar3< of CaCl/sub 2/. The absorption was carried out in a fluidized bed traversed by the flue gases at 600/sup 0/-900/sup 0/C. The degree and rate of transformation of CaCO/sub 3/ to CaSO/sub 4/ in the presence of SO/sub 2/ and air were compared for unmodified and modified absorbents. Initial rates of reaction and the variation of the rate of absorption with time were measured and the influence of the SO/sub 2/ content of the gas was assessed. At 700/sup 0/C, the maximum degree of transformation of activated limestone to sulfate exceeded 90Vertical Bar3<, whereas untreated CaCO/sub 3/ was only transformed to 16-20Vertical Bar3<. At the same temperature, more than 90Vertical Bar3< of the SO/sub 2/ contained in a gas carrying 0.35Vertical Bar3< SO/sub 2/ was removed. The modified absorbent achieves the same amount of sulfur removal with 2-4 times less absorbent than the unmodified absorbent. Thus, the costs of the absorbent and its disposal are reduced.

• Research Organization: Univ. Catholique Louvain
• OSTI ID: 6786289
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 28:10; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ADSORBENTS
BENCH-SCALE EXPERIMENTS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
COST BENEFIT ANALYSIS
DATA
DESULFURIZATION
EXPERIMENTAL DATA
FLUE GAS
FLUIDIZED BED
GASEOUS WASTES
HIGH TEMPERATURE
INFORMATION
KINETICS
LIMESTONE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TIME DEPENDENCE
WASTES