Der einfluβ der konzentration stabiler oberflächenoxide auf die intensität der oxydation von Ruβ durch sauerstoff-I. Oxydation bei konstantbleibender ruβoberfläche
✍ Scribed by Udo Wiesmann
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 1010 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
A carbon black, preoxidized and subsequently heat-treated at 1100"<~, was re-exposed to oxygen and its reaction intensity was measured at temperatures ranging from 267" to 416°C. The reaction occurred in a range of burn-up within which there was no significant' change in surface area. Both the intensity of formation of stable surface oxide and the intensity of carbon consumption could be represented as the sum of two Elovich functions with respect to the surface oxide concentration.
This becomes plausible if there are assumed to exist on the surface two types of active centres, which after being occupied by oxygen will give rise to two different surface oxides. The Elovich function