Nonsteady-state mathematical modelling of H2SO4-catalysed alkylation of isobutane with alkenes
| Autor: | Igor Dolganov, Alexander Kotelnikov, Rustam Khakimov, Elena Ivashkina, Emiliya Ivanchina, V.A. Chuzlov, Irena Dolganova |
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| Přispěvatelé: | School of Earth Sciences & Engineering, Tomsk Polytechnic University |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
Inorganic chemistry Energy Engineering and Power Technology 02 engineering and technology TP1-1185 Raw material Alkylation 010402 general chemistry 01 natural sciences Energy industries. Energy policy. Fuel trade Catalysis chemistry.chemical_compound Octane rating chemistry.chemical_classification [PHYS]Physics [physics] Chemical technology Alkylation unit 021001 nanoscience & nanotechnology 0104 chemical sciences Dilution Fuel Technology Hydrocarbon chemistry Isobutane HD9502-9502.5 0210 nano-technology |
| Zdroj: | Oil & Gas Science and Technology-Revue d'IFP Energies nouvelles Oil & Gas Science and Technology-Revue d'IFP Energies nouvelles, Institut Français du Pétrole, 2021, 76, pp.36. ⟨10.2516/ogst/2021017⟩ Oil & Gas Science and Technology, Vol 76, p 36 (2021) |
| ISSN: | 1294-4475 1953-8189 |
| DOI: | 10.2516/ogst/2021017⟩ |
| Popis: | H2SO4-catalysed isobutane alkylation with alkenes is an important industrial process used to obtain high-octane alkylate. In this process, the concentration of H2SO4 is one of the main parameters. For alkylation, sulphuric acid containing 88%–98% monohydrate is typically used. However, only a H2SO4 concentration of 95%–96% enables alkylate with the maximum octane number to be obtained. Changes in H2SO4 concentration due to decontamination are the main cause of process variations. Therefore, it is necessary to maintain the reactor acid concentration at a constant level by regulating the supply of fresh catalyst and pumping out any spent acid. The main reasons for the decrease in the H2SO4 concentration are accumulation of high-molecular organic compounds and dilution by water. One way to improve and predict unsteady alkylation processes is to develop a mathematical model that considers catalyst deactivation. In the present work, the formation reactions of undesired substances were used in the description of the alkylation process, indicating the sensitivity of the prediction to H2SO4 activity variations. This was used for calculation the optimal technological modes ensuring the maximum selectivity and stability of the chemical–technological system under varying hydrocarbon feedstock compositions. |
| Databáze: | OpenAIRE |
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