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The features of structural transformations of asphaltene molecules during hydroconversion of vacuum residue in the presence of nanosized molybdenum disulfide particlesстатья
- Авторы: Zaytseva O.V., Magomadov E.E., Kadiev Kh M., Chernysheva E.A., Kapustin V.M., Khadzhiev S.N.
- Журнал: Journal of Petroleum&Environmental Biotechnology
- Том: 5
- Номер: 4
- Год издания: 2014
- Первая страница: 89
- Последняя страница: 89
- DOI: 10.4172/2157-7463.S1.006
- Аннотация: Asphaltenes present in a significant amount in heavy petroleum feedstock act as coke precursors which in turn lead to deactivation of the catalyst during processing of heavy oil. And also they are precipitated on the catalyst surface and block the pore mouth. The solution to this problem most effectively implemented in the hydroconversion process in the presence of a nanosized catalyst particles that are synthesized “in situ” in the reaction environment. As catalyst precursors, water-soluble salts of a catalytically active metal are used, which are introduced in the form of a precursor aqueous solution-in-petroleum feedstock emulsion to have ultrafine catalyst particles homogeneously distributed in the reaction volume. In order to understand the mechanism of transformation of macromolecular components during the hydroconversion of heavy petroleum residues in the present work was to study the character of the structural changes in the asphaltene depending on the conditions of the process (temperature and number stages of conversions of asphaltene in the reaction zone). The results of this study show that one of the main features of the structural transformations of asphaltene molecules under hydroconversion conditions with the varying parameters of the process is the nonmonotonic character of change in the molecular mass. The molecular structure of asphaltenes depending conditions of the process varies in a discrete manner, passing through a step of transitional state (TS), in which system is the most susceptible to the action of external factor, whereby the qualitative rearrangement of the molecular structure of asphaltenes on a step of TS gives rise to a dramatic fall in molecular masses.
- Добавил в систему: Кадиев Хусаин Магамедович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | The_features_of_structural_transformations_of_asphaltene_mo… | 339,9 КБ | 14 апреля 2017 [KadievKhM] |