Benzene alkylation with ethylene

The way to increase the process efficiency

Elena Khlebnikova, Elena Ivashkina, Irena Dolganova

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ethylbenzene is the main ingredient to obtain textile fabric, plastics, detergents, etc. The current industrial ethylbenzene production method includes mainly zeolite catalyst. However, liquid acidic catalysts such are also still used. In contrast to zeolite alkylation technology, there is much less information on how to improve the alkylation unit performance. The present research investigates the possibility of obtaining this goal by intensifying the reagents mixing before the alkylation reactor. We present the results of the mixing chamber hydrodynamic modeling clearly showing that it is reasonable to change the way of reagents injection: benzene-into the first, circulating catalyst into the second and fresh catalyst into the third pipe branch along the ethylene flow. This will intensify the mixing process and reduce the size of the catalyst droplets bringing the alkylation from diffusion into kinetic region. This variant of reagents injection will also ensure the uniformity of reagents distribution. The possibility to decrease the circulating catalyst flow rate from 8000 to 5000 (kg h−1) without changing the mixing efficiency also demonstrates the feasibility of the proposed solution.

Original languageEnglish
Pages (from-to)234-240
Number of pages7
JournalChemical Engineering and Processing: Process Intensification
Volume120
DOIs
Publication statusPublished - 2017

Fingerprint

Alkylation
Benzene
Ethylene
Catalysts
Zeolites
Ethylbenzene
Detergents
ethylene
Textiles
Hydrodynamics
Pipe
Flow rate
Plastics
Kinetics
Liquids

Keywords

  • Droplets
  • Hydrodynamics
  • Mixers
  • Mixing
  • Optimization
  • Simulation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Process Chemistry and Technology
  • Industrial and Manufacturing Engineering

Cite this

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title = "Benzene alkylation with ethylene: The way to increase the process efficiency",
abstract = "Ethylbenzene is the main ingredient to obtain textile fabric, plastics, detergents, etc. The current industrial ethylbenzene production method includes mainly zeolite catalyst. However, liquid acidic catalysts such are also still used. In contrast to zeolite alkylation technology, there is much less information on how to improve the alkylation unit performance. The present research investigates the possibility of obtaining this goal by intensifying the reagents mixing before the alkylation reactor. We present the results of the mixing chamber hydrodynamic modeling clearly showing that it is reasonable to change the way of reagents injection: benzene-into the first, circulating catalyst into the second and fresh catalyst into the third pipe branch along the ethylene flow. This will intensify the mixing process and reduce the size of the catalyst droplets bringing the alkylation from diffusion into kinetic region. This variant of reagents injection will also ensure the uniformity of reagents distribution. The possibility to decrease the circulating catalyst flow rate from 8000 to 5000 (kg h−1) without changing the mixing efficiency also demonstrates the feasibility of the proposed solution.",
keywords = "Droplets, Hydrodynamics, Mixers, Mixing, Optimization, Simulation",
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T2 - The way to increase the process efficiency

AU - Khlebnikova, Elena

AU - Ivashkina, Elena

AU - Dolganova, Irena

PY - 2017

Y1 - 2017

N2 - Ethylbenzene is the main ingredient to obtain textile fabric, plastics, detergents, etc. The current industrial ethylbenzene production method includes mainly zeolite catalyst. However, liquid acidic catalysts such are also still used. In contrast to zeolite alkylation technology, there is much less information on how to improve the alkylation unit performance. The present research investigates the possibility of obtaining this goal by intensifying the reagents mixing before the alkylation reactor. We present the results of the mixing chamber hydrodynamic modeling clearly showing that it is reasonable to change the way of reagents injection: benzene-into the first, circulating catalyst into the second and fresh catalyst into the third pipe branch along the ethylene flow. This will intensify the mixing process and reduce the size of the catalyst droplets bringing the alkylation from diffusion into kinetic region. This variant of reagents injection will also ensure the uniformity of reagents distribution. The possibility to decrease the circulating catalyst flow rate from 8000 to 5000 (kg h−1) without changing the mixing efficiency also demonstrates the feasibility of the proposed solution.

AB - Ethylbenzene is the main ingredient to obtain textile fabric, plastics, detergents, etc. The current industrial ethylbenzene production method includes mainly zeolite catalyst. However, liquid acidic catalysts such are also still used. In contrast to zeolite alkylation technology, there is much less information on how to improve the alkylation unit performance. The present research investigates the possibility of obtaining this goal by intensifying the reagents mixing before the alkylation reactor. We present the results of the mixing chamber hydrodynamic modeling clearly showing that it is reasonable to change the way of reagents injection: benzene-into the first, circulating catalyst into the second and fresh catalyst into the third pipe branch along the ethylene flow. This will intensify the mixing process and reduce the size of the catalyst droplets bringing the alkylation from diffusion into kinetic region. This variant of reagents injection will also ensure the uniformity of reagents distribution. The possibility to decrease the circulating catalyst flow rate from 8000 to 5000 (kg h−1) without changing the mixing efficiency also demonstrates the feasibility of the proposed solution.

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KW - Mixers

KW - Mixing

KW - Optimization

KW - Simulation

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