4-Scale Model for Macromolecule Conversion over Mesoporous and Hierarchical Alumina Catalysts Full article
| Journal |
Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2021, Volume: 405, Article number : 126551, Pages count : 14 DOI: 10.1016/j.cej.2020.126551 | ||||||||||
| Tags | Deactivation modeling; Hierarchical catalyst; Macromolecule conversion; Texture | ||||||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0010 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 075-15-2019-1613 |
| 3 | University of Hradec Králové |
Abstract:
Mathematical model for macromolecule catalytic conversion in a flow reactor includes four interconnected numerical calculations of different scales for the following phenomena: effect of increasing the concentration of coke grains and their size (nanometers, scale of coke particles) on porosity, tortuosity, and specific area of the catalyst computing percolation graphs of the mesoporous and hierarchically porous catalysts (dozens of nanometers, scale of percolation graph); kinetic patterns for asphaltene conversion and catalyst deactivation in the mesoporous and hierarchically porous pellets (millimeters, catalyst pellet scale); macrokinetic model for reactor operation filled with mesoporous and hierarchically porous pellets (centimeters, reactor scale). Mathematical instruments involves both discrete (Lubachevsky-Stillinger, Dijkstra algorithm) and continuous (Fick's law, kinetic equations) methods. Rate constants for kinetic modeling of the reactor operation were extracted by approximating the experimental points for the conversion of asphaltenes at the conditions close to industrial ones by numerically obtained curves. Striking difference in the texture evolution of mesoporous and hierarchical catalysts, observed by both catalytic experiments and theory, during asphaltene conversion (HDAs) resulted in fast deactivation of the first catalyst while the second one showed a long-term stability. The model is an excellent tool for the targeted design of high-performance hierarchical catalysts and catalytic layers and gives new possibilities in selection of the catalyst preparation ways. © 2020 Elsevier B.V.
Cite:
Parkhomchuk E.V.
, Bazaikin Y.V.
, Malkovich E.G.
, Lysikov A.I.
, Vorobieva E.E.
, Fedotov K.V.
, Kleymenov A.V.
4-Scale Model for Macromolecule Conversion over Mesoporous and Hierarchical Alumina Catalysts
Chemical Engineering Journal. 2021. V.405. 126551 :1-14. DOI: 10.1016/j.cej.2020.126551 WOS Scopus РИНЦ AN OpenAlex
4-Scale Model for Macromolecule Conversion over Mesoporous and Hierarchical Alumina Catalysts
Chemical Engineering Journal. 2021. V.405. 126551 :1-14. DOI: 10.1016/j.cej.2020.126551 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jun 9, 2020 |
| Accepted: | Aug 4, 2020 |
| Published online: | Aug 15, 2020 |
| Published print: | Feb 1, 2021 |
Identifiers:
| Web of science: | WOS:000623320500005 |
| Scopus: | 2-s2.0-85089581223 |
| Elibrary: | 45365315 |
| Chemical Abstracts: | 2020:1667234 |
| OpenAlex: | W3049487247 |