Asymmetric temperature profiles in a single catalyst pellet
โ Scribed by Ho-Peng Koh; R. Hughes; P. Harriott
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 647 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-2509
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โฆ Synopsis
For rapid reactions the differences in local coefficients of heat and mass transfer around the surface of a catalyst particle lead to a distribution of surface temperatures and an asymmetric internal profile. The nature of these distributions and their changes with flow rate were predicted for the hydrogenation of ethylene on a single spherical pellet of nickel on silica alumina. The measured surface and internal temperature were in good agreement with the predictions.
๐ SIMILAR VOLUMES
In the product separation units of ethylene cracking plants the ethylene stream contains acetylene. This acetylene has to be removed, because it hampers the ethylene polymerization. Usually this is done in a catalytic adiabatic fixed bed reactor, where the acetylene is selectively hydrogenated with
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Temperatures within and near to single pellets of tin/antimony oxide used to catalyse the oxidative dehydrogenation of butene to butadiene have been measured and the results compared with values predicted by a mathematical model. The observed temperature difference was up to lO"C, depending on the r