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Raman Spectroscopy Studies of Reactions Between Sulfur Dioxide and Microparticles of Hydroxides

Published online by Cambridge University Press:  10 February 2011

C. L. Aardahl  and
E. J. Davis
C. L. Aardahl
Affiliation:
Department of Chemical Engineering, Box 351750, University of Washington, Seattle, WA 98195-1750, davis@cheme.washington.edu
E. J. Davis
Affiliation:
Department of Chemical Engineering, Box 351750, University of Washington, Seattle, WA 98195-1750, davis@cheme.washington.edu
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Abstract

Gas-aerosol chemical reactions between dilute SO2 and alkali-metal hydroxides have been explored using elastic and inelastic (Raman) light scattering. Single charged particles of NaOH, KOH, and Ca(OH)2 were levitated electrodynamically in a reaction chamber and exposed to humid nitrogen. Particles that were not water soluble remained crystalline while water soluble compounds deliquesced into solution microdroplets. The resulting solids or solutions were reacted with dilute SO2 in humid N2. Elastic scattering measurements and Raman spectra were taken during the gas-aerosol reactions, and results indicate that reaction products and sorbent utilization are highly dependent on the water content of the particle.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 432: Symposium S – Aqueous Chemistry and Geochemistry of Oxides , 1996 , 209
Copyright
Copyright © Materials Research Society 1997

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