Dissociative adsorption of sulfur dioxide on γ-alumina investigated by TPD and 
mass spectrometry

Dalla Lana, Ivo G.; Karge, Hellmut G.; George, Zacheria M.

doi:10.1021/j100132a033

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Dissociative adsorption of sulfur dioxide on γ-alumina investigated by TPD and mass spectrometry

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Dalla Lana, Ivo G.
Department of Chemical Engineering, University of Alberta;
Fritz Haber Institute, Max Planck Society;

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Karge, Hellmut G.
Fritz Haber Institute, Max Planck Society;

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George, Zacheria M.
Fritz Haber Institute, Max Planck Society;
Alberta Research Council;

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Citation

Dalla Lana, I. G., Karge, H. G., & George, Z. M. (1993). Dissociative adsorption of sulfur dioxide on γ-alumina investigated by TPD and mass spectrometry. The Journal of Physical Chemistry, 70(30), 8005-8011. doi:10.1021/j100132a033.

Cite as: https://hdl.handle.net/21.11116/0000-000A-5B55-1

Abstract

Prior studies on the adsorption of S0₂ on γ-alumina are not particularly revealing about the SO₂-alumina
surface interactions. Chemisorbed SO₂ on alumina was examined using a TPD-MS approach. The use of S¹⁸O₂ clearly demonstrated that both molecular and dissociated forms of SO₂ chemisorb on the surface of γ-alumina. The most likely mode of adsorption apparently involves interaction between oxygen atoms in the gaseous molecule and oxygen vacancies on the surface of alumina. The experiments also reveal the freedom of surface protons to form hydroxyl groups on the alumina surface.