| Autor: |
Dokuchaev, I. S., Zurnina, A. A., Sklyuev, P. V., Maximov, N. М., Tyshchenko, V. A. |
| Předmět: |
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| Zdroj: |
Russian Journal of General Chemistry; Jun2024, Vol. 94 Issue 6, p1487-1493, 7p |
| Abstrakt: |
This paper presents the results of a study of the conversion of vacuum residue in the presence of finely dispersed regenerated spent aluminum-cobalt-molybdenum hydrotreating catalysts in oxide and sulfide forms, as well as manganese acetylacetonate and cobalt acetylacetonate. The value of the yield of light fractions was chosen as the factor determining the efficiency of the process. The proposed catalyst samples are capable of exhibiting catalytic activity in the direction of intermolecular hydrogen transfer reactions, which presumably can lead to an increase in the yield of light fractions by suppressing the formation of compaction products. The experiments were carried out in an autoclave at an atmospheric pressure of 0.1 MPa, with a contact time of 30 min and temperatures of 440 and 460°C. The yield and composition of hydrocarbon gas were analyzed, the yield of narrow fractions of the process was analyzed, and the physicochemical properties of the resulting narrow fractions were determined, such as density, sulfur content, iodine number, kinematic viscosity of diesel fractions, and cetane index of diesel fractions. Material balances of the processes carried out are presented. A comparative analysis of the influence of the proposed catalyst samples on the results of the vacuum residue cracking process in the presence of a suspended catalyst was performed. The increase in the yield of light fractions relative to thermal processes at corresponding temperatures was calculated for each catalyst sample. The rate constants for the formation of light fractions, normalized to the number of moles of the active component of the catalyst samples, are given. The obtained values were compared, and the operating efficiency of each catalyst sample was analyzed. Conclusions are drawn about the prospects for using the proposed catalyst samples in thermodestructive processes of processing heavy oil residues at oil refineries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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