Effect of modifiers on Fe-Pt/Al2O3 catalysts for alkanes hydrotreatment
| Autor: | A.K. Zhumabekova, G. D. Zakumbaeva, R.O. Orynbassar, L. K. Tastanova, Electrochemistry, Almaty, Kazakhstan |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Bulletin of the Karaganda University. "Chemistry" series. 100:104-118 |
| ISSN: | 2663-4872 2518-718X |
| DOI: | 10.31489/2020ch4/104-118 |
| Popis: | Zeolite-containing polyfunctional catalysts Fe-Pt/Al2O3 (КТ-17, КТ-18), modified with additives of molyb-denum, phosphorus and cerium, were synthesized. The developed catalytic systems were studied in treatment of C14 alkane obtaining a gasoline fraction. Reaction products contain C4-C9 iso-alkanes, C10-C14 iso-alkanes, C4-C10 alkanes, aromatic hydrocarbons and C1-C3 alkanes. In addition, 0.2–0.6 % of heavy hydro-carbons was found in reaction products. The yield of C4-C9 iso-alkanes at 380 °C reached 37.9 %. By means of physical and chemical methods it has been found that the zeolite containing catalysts Fe-Pt /Al2O3 modi-fied by various additives are complex systems. Micro-diffraction and Mossbauer spectroscopy methods al-lowed detecting nanosized hetero clusters of Fe-Pt, Fe-Mo, Pt-Mo in catalysts structure. Depending on chem-ical composition of clusters, particle size varies between 20 and 80 Ǻ. KT-18 catalyst demonstrates high ac-tivity in the process of heavy alkanes treatment; sizes of platinum (d = 200 Å) and iron (d = 30–50 Å) parti-cles were determined by electron microscopy. Activity of KT-18 catalyst is higher than that of highly dis-persed KT-17. The main feature of KT catalysts is their polyfunctionality. During alkanes processing simul-taneous and consecutive reactions of hydrocracking, dehydrogenation, isomerization, dehydro-cyclization and hydro-desulfurization take place. |
| Databáze: | OpenAIRE |
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