The Dehydrogenation of Propane on Platinum–Tin Glass-Fiber Woven Catalysts
| Autor: | L. A. Sementsova, E. I. Knerel’man, T. V. Dorofeeva, L. P. Didenko, G. I. Davydova, P. E. Chizhov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_element
General Chemistry 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences Catalysis 0104 chemical sciences Computer Science Applications chemistry.chemical_compound chemistry Chemical engineering Propane Modeling and Simulation Specific surface area Dehydrogenation Tin Platinum Carbon Space velocity |
| Zdroj: | Kinetics and Catalysis. 59:472-480 |
| ISSN: | 1608-3210 0023-1584 |
| Popis: | The reaction of propane dehydrogenation on platinum–tin catalysts supported onto different woven carriers (an aluminoborosilicate and two silica materials) was studied. It was found that the catalyst was rapidly deactivated by carbon deposits formed, and the rate of this reaction increased with the specific surface area of the glass-fiber woven material and the Pt content. It was established that the Pt: Sn ratio in surface platinum particles was about 6, and it increased to 39 after the reaction; this fact is indicative of a Sn loss, which led to an increase in the conversion of feed into carbon deposits that deactivated the catalyst. A mixture of propane and 5–10 vol % H2 should be used for the stabilization of the catalytic system; in this case, the negative effect of hydrogen on the yield of propylene was minimal. On the catalyst supported onto a silica carrier under optimum conditions (550°C; propane space velocity, 480 h–1), which correspond to minimum selectivity for the formation of carbon deposits, the yield of propylene was ~18%. The test glass-fiber woven catalyst was inferior to granulated platinum–tin catalysts in terms of catalytic activity; therefore, its use in the reaction of propane dehydrogenation is inexpedient. |
| Databáze: | OpenAIRE |
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