Sulphur dioxide oxidation kinetics: The absorption of oxygen in V2O5—potassium pyrosulphate melts

✍ Scribed by F.P.B. Holroyd; C.N. Kenney

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 403 KB
• Volume: 26
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(71)80035-0

✦ Synopsis

The kinetics are described of the oxidation of Pry in the sulphuric acid catalyst system containing vanadium oxides in molten potassium pyrosulphate. The rate of absorption is proportional to the square root of the oxygen partial pressure and directly proportional to the mole fraction of W. The activation energy is 40.6 kJ/gmol. It is suggested that the reoxidation reaction is diffusion controlled, and order of magnitude calculations indicate that it is confined to a surface layer in the melt approximately 900 A in thickness.