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The significance of fly ash in wet-dry scrubbing of SO2

Petersen, Tom and Karlsson, Hans LU (1988) In Chemical Engineering & Technology 11(1). p.298-305
Abstract
A bench scale flue gas desulphurization spray dry scrubbing unit was employed to study the effect of fly ash on the removal of SO2. The equipment consisted of a spray dryer with and ultrasonic nozzle for atomization and a pulse jet baghouse. The flue gas rate was 1500 lN/h (dry gas). Four fly ashes, originating from different countries were investigated. The alkalinity and reactivity of the fly ashes were determined in a pH-stat equipment. Pure fly ash removed SO2 in both the spray dryer and in the baghouse. An increase of humidity divided the fly ashes into two groups. The high calcium fly ash gave a considerably higher SO2 removal than the medium and low calcium fly ashes which showed similar SO2 removals. Fly ash did not enhance the... (More)
A bench scale flue gas desulphurization spray dry scrubbing unit was employed to study the effect of fly ash on the removal of SO2. The equipment consisted of a spray dryer with and ultrasonic nozzle for atomization and a pulse jet baghouse. The flue gas rate was 1500 lN/h (dry gas). Four fly ashes, originating from different countries were investigated. The alkalinity and reactivity of the fly ashes were determined in a pH-stat equipment. Pure fly ash removed SO2 in both the spray dryer and in the baghouse. An increase of humidity divided the fly ashes into two groups. The high calcium fly ash gave a considerably higher SO2 removal than the medium and low calcium fly ashes which showed similar SO2 removals. Fly ash did not enhance the removal of SO2 when added to a lime slurry because lime suppresses the dissolution of the alkali in the fly ashes. The pressure drop build-up in the fabric filter showed a strong dependence on material properties. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Engineering & Technology
volume
11
issue
1
pages
298 - 305
publisher
John Wiley & Sons
external identifiers
  • scopus:0024096029
ISSN
1521-4125
DOI
10.1002/ceat.270110139
language
English
LU publication?
yes
id
4ee716c1-f043-45dc-a639-20b54eb1a15c (old id 3918104)
date added to LUP
2013-07-05 08:07:22
date last changed
2017-05-28 03:44:25
@article{4ee716c1-f043-45dc-a639-20b54eb1a15c,
  abstract     = {A bench scale flue gas desulphurization spray dry scrubbing unit was employed to study the effect of fly ash on the removal of SO2. The equipment consisted of a spray dryer with and ultrasonic nozzle for atomization and a pulse jet baghouse. The flue gas rate was 1500 lN/h (dry gas). Four fly ashes, originating from different countries were investigated. The alkalinity and reactivity of the fly ashes were determined in a pH-stat equipment. Pure fly ash removed SO2 in both the spray dryer and in the baghouse. An increase of humidity divided the fly ashes into two groups. The high calcium fly ash gave a considerably higher SO2 removal than the medium and low calcium fly ashes which showed similar SO2 removals. Fly ash did not enhance the removal of SO2 when added to a lime slurry because lime suppresses the dissolution of the alkali in the fly ashes. The pressure drop build-up in the fabric filter showed a strong dependence on material properties.},
  author       = {Petersen, Tom and Karlsson, Hans},
  issn         = {1521-4125},
  language     = {eng},
  number       = {1},
  pages        = {298--305},
  publisher    = {John Wiley & Sons},
  series       = {Chemical Engineering & Technology},
  title        = {The significance of fly ash in wet-dry scrubbing of SO2},
  url          = {http://dx.doi.org/10.1002/ceat.270110139},
  volume       = {11},
  year         = {1988},
}