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Complex-Oxide Catalysts in Cracking of Propane
https://orcid.org/https://orcid.org/0000-0002-1421-1218
https://orcid.org/https://orcid.org/0000-0002-8974-5329
https://orcid.org/https://orcid.org/0009-0005-3301-4702
https://orcid.org/https://orcid.org/0009-0003-4150-0087
https://orcid.org/https://orcid.org/0009-0002-7994-1825
https://orcid.org/https://orcid.org/0000-0002-1954-2809
https://orcid.org/https://orcid.org/0000-0003-2735-2893
https://orcid.org/https://orcid.org/0000-0002-4709-5313
The study investigates propane conversion in the presence of rare-earth metal zirconates Ln2Zr2O7 (Ln = La, Gd, and Lu) prepared by high-temperature solid-phase synthesis at 500, 1000, and 1500°C. In the La2Zr2O7 → Gd2Zr2O7 → Lu2Zr2O7 series, the phase transitions were found to follow the pyrochlore → defective fluorite → δ-phase route. This changed the parameters of the crystalline and local structures and, in particular, led to the appearance of oxygen vacancies in pyrochlore-based compounds. As a result of the structural changes, propane dehydrogenation prevailed over propane degradation. Therefore, the Lu2Zr2O7 catalyst exhibited a higher propylene selectivity (up to 65%) than La2Zr2O7, with 100% propane conversion being achieved.
Complex-Oxide Catalysts in Cracking of Propane
https://orcid.org/https://orcid.org/0000-0002-1421-1218
https://orcid.org/https://orcid.org/0000-0002-8974-5329
https://orcid.org/https://orcid.org/0009-0005-3301-4702
https://orcid.org/https://orcid.org/0009-0003-4150-0087
https://orcid.org/https://orcid.org/0009-0002-7994-1825
https://orcid.org/https://orcid.org/0000-0002-1954-2809
https://orcid.org/https://orcid.org/0000-0003-2735-2893
https://orcid.org/https://orcid.org/0000-0002-4709-5313
The study investigates propane conversion in the presence of rare-earth metal zirconates Ln2Zr2O7 (Ln = La, Gd, and Lu) prepared by high-temperature solid-phase synthesis at 500, 1000, and 1500°C. In the La2Zr2O7 → Gd2Zr2O7 → Lu2Zr2O7 series, the phase transitions were found to follow the pyrochlore → defective fluorite → δ-phase route. This changed the parameters of the crystalline and local structures and, in particular, led to the appearance of oxygen vacancies in pyrochlore-based compounds. As a result of the structural changes, propane dehydrogenation prevailed over propane degradation. Therefore, the Lu2Zr2O7 catalyst exhibited a higher propylene selectivity (up to 65%) than La2Zr2O7, with 100% propane conversion being achieved.
Complex-Oxide Catalysts in Cracking of Propane
https://orcid.org/https://orcid.org/0000-0002-1421-1218
https://orcid.org/https://orcid.org/0000-0002-8974-5329
https://orcid.org/https://orcid.org/0009-0005-3301-4702
https://orcid.org/https://orcid.org/0009-0003-4150-0087
https://orcid.org/https://orcid.org/0009-0002-7994-1825
https://orcid.org/https://orcid.org/0000-0002-1954-2809
https://orcid.org/https://orcid.org/0000-0003-2735-2893
https://orcid.org/https://orcid.org/0000-0002-4709-5313
The study investigates propane conversion in the presence of rare-earth metal zirconates Ln2Zr2O7 (Ln = La, Gd, and Lu) prepared by high-temperature solid-phase synthesis at 500, 1000, and 1500°C. In the La2Zr2O7 → Gd2Zr2O7 → Lu2Zr2O7 series, the phase transitions were found to follow the pyrochlore → defective fluorite → δ-phase route. This changed the parameters of the crystalline and local structures and, in particular, led to the appearance of oxygen vacancies in pyrochlore-based compounds. As a result of the structural changes, propane dehydrogenation prevailed over propane degradation. Therefore, the Lu2Zr2O7 catalyst exhibited a higher propylene selectivity (up to 65%) than La2Zr2O7, with 100% propane conversion being achieved.
Complex-Oxide Catalysts in Cracking of Propane
Pet. Chem.
Kurochkin, A. V. (author) / Seromlyanova, K. A. (author) / Selivanova, M. M. (author) / Malyshev, D. N. (author) / Tereshkina, A. D. (author) / Lobanov, N. N. (author) / Markova, E. B. (author) / Cherednichenko, A. G. (author)
Petroleum Chemistry ; 64 ; 413-420
2024-03-01
8 pages
Article (Journal)
Electronic Resource
English
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