Reactive collisions of sulfur dioxide with molten carbonates.

Proceedings of the National Academy of Sciences of the United States of America
Thomas Krebs, Gilbert M Nathanson

Abstract

Molecular beam scattering experiments are used to investigate reactions of SO(2) at the surface of a molten alkali carbonate eutectic at 683 K. We find that two-thirds of the SO(2) molecules that thermalize at the surface of the melt are converted to gaseous CO(2) via the reaction SO(2)(g) + CO(3)(2-) --> CO(2)(g) + SO(3)(-2). The CO(2) product is formed from SO(2) in less than 10(-6) s, implying that the reaction takes place in a shallow liquid region less than 100 A deep. The reaction probability does not vary between 683 and 883 K, further implying a compensation between decreasing SO(2) residence time in the near-interfacial region and increasing reactivity at higher temperatures. These results demonstrate the remarkable efficiency of SO(2) --> CO(2) conversion by molten carbonates, which appear to be much more reactive than dry calcium carbonate or wet slurries commonly used for flue gas desulfurization in coal-burning power plants.

References

May 1, 2004·Annual Review of Physical Chemistry·Gilbert M Nathanson
Jan 26, 2005·Journal of the Air & Waste Management Association·R K Srivastava, W Jozewicz
May 26, 2006·The Journal of Physical Chemistry. a·Ch Santschi, M J Rossi
Jul 13, 2006·The Journal of Physical Chemistry. a·Jennifer R LawrenceGilbert M Nathanson
Mar 21, 2005·Physical Chemistry Chemical Physics : PCCP·H A Al-Hosney, V H Grassian
Nov 1, 1973·Environmental Science & Technology·R A McIlroyC J Major

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Citations

Jul 10, 2019·Journal of the American Society for Mass Spectrometry·Anna TroianiGiulia de Petris
Dec 25, 2010·The Journal of Physical Chemistry. a·Thomas Krebs, Gilbert M Nathanson

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