Issue 9, 1984

Factors influencing the temperature-programmed reduction profiles of vanadium pentoxide

Abstract

The temperature-programmed reduction (t.p.r.) of bulk V2O5 has been examined as part of a study of the reducibility of V2O5-containing catalysts. T.p.r. profiles have been studied as a function of flow rate, heating rate and sample weight. From experiments at different flow rates it is concluded that the order of the reduction rate in hydrogen is low or even zero. A rule of thumb has been derived to provide an easy check on possible exhaustion of hydrogen in the feed. The influence of sample weight and heating rate is explained in terms of the formation of water in the sample during reduction. The reduction of bulk V2O5 to V2O3 proceeds in several steps; intermediate species include V6O13 and VO2. The apparent activation energy of ca. 200 kJ mol–1 indicates that solid-state diffusion influences the reduction process of V2O5.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1984,80, 2479-2488

Factors influencing the temperature-programmed reduction profiles of vanadium pentoxide

H. Bosch, B. J. Kip, J. G. van Ommen and P. J. Gellings, J. Chem. Soc., Faraday Trans. 1, 1984, 80, 2479 DOI: 10.1039/F19848002479

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements