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http://earchive.tpu.ru/handle/11683/70758
Название: | A Model of Catalytic Cracking: Catalyst Deactivation Induced by Feedstock and Process Variables |
Авторы: | Nazarova, Galina Yurievna Ivashkina, Elena Nikolaevna Ivanchina, Emilia Dmitrievna Mezhova, Mariya Yurjevna |
Ключевые слова: | смолы; ароматические вещества; катализаторы; кокс; каталитический крекинг; дезактивация; saturates; resins; aromatics; catalyst-to-oil ratio; slops; catalyst; coke; activity |
Дата публикации: | 2022 |
Издатель: | MDPI AG |
Библиографическое описание: | A Model of Catalytic Cracking: Catalyst Deactivation Induced by Feedstock and Process Variables / G. Yu. Nazarova, E. N. Ivashkina, E. D. Ivanchina, M. Yu. Mezhova // Catalysts. — 2022. — Vol. 12, iss. 1. — [98, 14 p.]. |
Аннотация: | Changes in the quality of the feedstocks generated by involving various petroleum fractions in catalytic cracking significantly affect catalyst deactivation, which stems from coke formed on the catalyst surface. By conducting experimental studies on feedstocks and catalysts, as well as using industrial data, we studied how the content of saturates, aromatics and resins (SAR) in feedstock and the main process variables, including temperature, consumptions of the feedstock, catalyst and slops, influence the formation of catalytic coke. We also determined catalyst deactivation patterns using TG-DTA, N2 adsorption and TPD, which were further used as a basis for a kinetic model of catalytic cracking. This model helps predict the changes in reactions rates caused by coke formation and, also, evaluates quantitatively how group characteristics of the feedstock, the catalyst-to-oil ratio and slop flow influence the coke content on the catalyst and the degree of catalyst deactivation. We defined that a total loss of acidity changes from 8.6 to 30.4 wt% for spent catalysts, and this depends on SAR content in feedstock and process variables. The results show that despite enriching the feedstock by saturates, the highest coke yields (4.6-5.2 wt%) may be produced due to the high content of resins (2.1-3.5 wt%). |
URI: | http://earchive.tpu.ru/handle/11683/70758 |
Располагается в коллекциях: | Репринты научных публикаций |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
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reprint-nw-38080.pdf | 4,01 MB | Adobe PDF | Просмотреть/Открыть |
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