Determination of the Service Life of Zeolite Oligomerization Catalysts by Accelerated Deactivation Testing
| Autor: | Irina I. Ivanova, A. V. Efimov, S. E. Kuznetsov, A. V. Kleimenov, Andrey G. Popov |
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| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
010405 organic chemistry Chemistry General Chemical Engineering Steaming Energy Engineering and Power Technology General Chemistry Coke 010402 general chemistry complex mixtures 01 natural sciences 0104 chemical sciences Catalysis Fuel Technology Chemical engineering Geochemistry and Petrology Service life Zeolite Cycle length |
| Zdroj: | Petroleum Chemistry. 59:903-909 |
| ISSN: | 1555-6239 0965-5441 |
| DOI: | 10.1134/s0965544119080176 |
| Popis: | Both freshly prepared and steamed MFI zeolite catalysts have been tested for service life. It has been shown that the zeolite cycle length is increased from 7 to 60 days by steaming. In contrast, comparative testing under mild conditions at 300°С has demonstrated low on-stream stability of the catalyst after steaming. Thermogravimetric analysis data indicate different mechanisms of coke formation on samples at 300°С: polyaromatic coke is produced on the fresh sample and predominantly polyaliphatic coke forms on the steamed sample. It has been found that correct comparison of oligomerization catalysts differing in acidity requires a temperature no less than 380°С, which ensures the formation of polyaromatic coke on both catalysts. As a result of the study, a rapid procedure for accelerated deactivation testing has been developed that makes it possible to obtain data comparable with those of long-term service life tests. |
| Databáze: | OpenAIRE |
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