Decreasing the hydrogen-rich gas circulation ratio and service life extension of the C9-C14 alkanes dehydrogenation catalyst

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Abstract

This article describes the method of reducing the supply of hydrogen into the reaction zone of the dehydrogenation process for C9-C14 hydrocarbons. Coke suppression method is proposed, based on changing the flow of demineralized water into the reactor as water is involved in the oxidation of coke structures. Calculation of water amount is based on the mathematical model that authors have developed for the dehydrogenation process. Results of the model calculations show that the reduction of hydrogen gas supply can be compensated with increasing the water supply into the reactor, proven with a test at the actual industrial plant. It can be compensated partially with increasing the water flow into the reactor up to 13-14l/h instead of normal 9-10l/h at the end of the operation cycle. Reducing the service life of the catalyst to 270-290days even at an increased water flow is still a factor, determined by the intensity of the coking reactions. However, the economic feasibility of operating under such conditions causes a considerable increase in the linear alkylbenzenes (LABs) production, up to 181-186tons per day.

Original languageEnglish
JournalChemical Engineering Journal
DOIs
Publication statusAccepted/In press - 2015

Fingerprint

Plant life extension
Alkanes
Dehydrogenation
Service life
alkane
Paraffins
Hydrogen
Gases
catalyst
hydrogen
Catalysts
Water
water flow
gas
Coke
gas supply
water
Flow of water
Gas supply
Coking

Keywords

  • Deactivation
  • Dehydrogenation
  • H-containing gas
  • Linear alkyl benzene
  • Mathematical model
  • Pt-catalyst

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

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title = "Decreasing the hydrogen-rich gas circulation ratio and service life extension of the C9-C14 alkanes dehydrogenation catalyst",
abstract = "This article describes the method of reducing the supply of hydrogen into the reaction zone of the dehydrogenation process for C9-C14 hydrocarbons. Coke suppression method is proposed, based on changing the flow of demineralized water into the reactor as water is involved in the oxidation of coke structures. Calculation of water amount is based on the mathematical model that authors have developed for the dehydrogenation process. Results of the model calculations show that the reduction of hydrogen gas supply can be compensated with increasing the water supply into the reactor, proven with a test at the actual industrial plant. It can be compensated partially with increasing the water flow into the reactor up to 13-14l/h instead of normal 9-10l/h at the end of the operation cycle. Reducing the service life of the catalyst to 270-290days even at an increased water flow is still a factor, determined by the intensity of the coking reactions. However, the economic feasibility of operating under such conditions causes a considerable increase in the linear alkylbenzenes (LABs) production, up to 181-186tons per day.",
keywords = "Deactivation, Dehydrogenation, H-containing gas, Linear alkyl benzene, Mathematical model, Pt-catalyst",
author = "Evgeniya Frantsina and Elena Ivashkina and Emiliya Ivanchina and Rostislav Romanovskii",
year = "2015",
doi = "10.1016/j.cej.2015.02.036",
language = "English",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
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TY - JOUR

T1 - Decreasing the hydrogen-rich gas circulation ratio and service life extension of the C9-C14 alkanes dehydrogenation catalyst

AU - Frantsina, Evgeniya

AU - Ivashkina, Elena

AU - Ivanchina, Emiliya

AU - Romanovskii, Rostislav

PY - 2015

Y1 - 2015

N2 - This article describes the method of reducing the supply of hydrogen into the reaction zone of the dehydrogenation process for C9-C14 hydrocarbons. Coke suppression method is proposed, based on changing the flow of demineralized water into the reactor as water is involved in the oxidation of coke structures. Calculation of water amount is based on the mathematical model that authors have developed for the dehydrogenation process. Results of the model calculations show that the reduction of hydrogen gas supply can be compensated with increasing the water supply into the reactor, proven with a test at the actual industrial plant. It can be compensated partially with increasing the water flow into the reactor up to 13-14l/h instead of normal 9-10l/h at the end of the operation cycle. Reducing the service life of the catalyst to 270-290days even at an increased water flow is still a factor, determined by the intensity of the coking reactions. However, the economic feasibility of operating under such conditions causes a considerable increase in the linear alkylbenzenes (LABs) production, up to 181-186tons per day.

AB - This article describes the method of reducing the supply of hydrogen into the reaction zone of the dehydrogenation process for C9-C14 hydrocarbons. Coke suppression method is proposed, based on changing the flow of demineralized water into the reactor as water is involved in the oxidation of coke structures. Calculation of water amount is based on the mathematical model that authors have developed for the dehydrogenation process. Results of the model calculations show that the reduction of hydrogen gas supply can be compensated with increasing the water supply into the reactor, proven with a test at the actual industrial plant. It can be compensated partially with increasing the water flow into the reactor up to 13-14l/h instead of normal 9-10l/h at the end of the operation cycle. Reducing the service life of the catalyst to 270-290days even at an increased water flow is still a factor, determined by the intensity of the coking reactions. However, the economic feasibility of operating under such conditions causes a considerable increase in the linear alkylbenzenes (LABs) production, up to 181-186tons per day.

KW - Deactivation

KW - Dehydrogenation

KW - H-containing gas

KW - Linear alkyl benzene

KW - Mathematical model

KW - Pt-catalyst

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