Electrochemical determination of the diffusion coefficient of vanadium (+ V) in a potassium sulphate-disulphate melt

✍ Scribed by M. Comtat; F. Gomez; J. Mahenc

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 495 KB
• Volume: 30
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(75)85035-4

✦ Synopsis

The investigation of the kinetics of the vapour phase oxidation of furfural over vanadium catalyst reported earlier [l] has been extended to establish the mechanism of this reaction. Langmuir-Hinshelwood, Rideal and redox mechanisms are employed for the elucidation of the mechanism of this reaction. The experimental set-up, catalyst composition and analytical procedure are reported earlier [ 11.

Ten different mechanisms along with their models employed for the elucidation of the mechanism are given elsewhere [2]. All these models were discriminated employing the non-intrinsic parameter method [3]. Models other than that corresponding to the redox mechanism gave parameters which are large and negative or unacceptable in other ways and hence are rejected. The order of the reaction was found to be one with respect to the partial pressures of furfural and oxygen. Therefore the two-stage redox mechanism would seem to be the most satisfactory to date.