Dual role of ferric chloride in modification of USY catalyst for enhanced olefin production from refinery fuel oil

Samira Shirvani, Mohammad Ghashghaee*, Søren Kegnæs

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Herein, ultra-stable Y zeolite (USY) catalysts modified with iron doping (1, 3, and 5 wt%) using FeCl3•6H2O as a precursor have been investigated. Detailed characterization of the synthesized catalysts was implemented through different analytical techniques including XRD, FTIR, UV–vis DRS, NH3-TPD, H2-TPR, N2 physisorption, EDX, FESEM, ICP-EOS, and XRF. The strong Lewis acidity of the precursor bestowed improved acidic properties to the parent USY besides a satisfactory partial dealumination of the zeolite structure. The optimal dispersion and structural properties were obtained in the case of 1 wt% doping of iron, which eventually led to superb olefin productivity (more than 56 wt%) in the upgrading of refinery fuel oil at mild operating conditions (atmospheric pressure and 550 °C). The optimum catalyst (1Fe/USY) has undergone further experiments with varying temperatures and space velocities to assess the apparent kinetics based on the Arrhenius model. A threefold increase in the space velocity (from 18.3 to 54.9 h–1) only slightly reduced the olefin productivity of the catalyst (to 47.1 wt%), which was still notable from a heavy feedstock. Reduction of the reaction temperature to 450 °C led to a decrease in the olefins yield to less than a half (23.3 wt%). Overall, the modified catalysts were capable of producing a high amount of light olefins from heavy fuel oil, with an orientation toward propylene as the most favored building block in the petrochemical industries.

Original languageEnglish
JournalApplied Catalysis A: General
Volume580
Pages (from-to)131-139
Number of pages9
ISSN0926-860X
DOIs
Publication statusPublished - 2019

Keywords

  • Catalytic cracking
  • Fuel oil
  • Iron
  • Light olefins
  • USY
  • Zeolite

Cite this

@article{a8a26be46f9844a3adc397b82aac649b,
title = "Dual role of ferric chloride in modification of USY catalyst for enhanced olefin production from refinery fuel oil",
abstract = "Herein, ultra-stable Y zeolite (USY) catalysts modified with iron doping (1, 3, and 5 wt{\%}) using FeCl3•6H2O as a precursor have been investigated. Detailed characterization of the synthesized catalysts was implemented through different analytical techniques including XRD, FTIR, UV–vis DRS, NH3-TPD, H2-TPR, N2 physisorption, EDX, FESEM, ICP-EOS, and XRF. The strong Lewis acidity of the precursor bestowed improved acidic properties to the parent USY besides a satisfactory partial dealumination of the zeolite structure. The optimal dispersion and structural properties were obtained in the case of 1 wt{\%} doping of iron, which eventually led to superb olefin productivity (more than 56 wt{\%}) in the upgrading of refinery fuel oil at mild operating conditions (atmospheric pressure and 550 °C). The optimum catalyst (1Fe/USY) has undergone further experiments with varying temperatures and space velocities to assess the apparent kinetics based on the Arrhenius model. A threefold increase in the space velocity (from 18.3 to 54.9 h–1) only slightly reduced the olefin productivity of the catalyst (to 47.1 wt{\%}), which was still notable from a heavy feedstock. Reduction of the reaction temperature to 450 °C led to a decrease in the olefins yield to less than a half (23.3 wt{\%}). Overall, the modified catalysts were capable of producing a high amount of light olefins from heavy fuel oil, with an orientation toward propylene as the most favored building block in the petrochemical industries.",
keywords = "Catalytic cracking, Fuel oil, Iron, Light olefins, USY, Zeolite",
author = "Samira Shirvani and Mohammad Ghashghaee and S{\o}ren Kegn{\ae}s",
year = "2019",
doi = "10.1016/j.apcata.2019.05.010",
language = "English",
volume = "580",
pages = "131--139",
journal = "Applied Catalysis A: General",
issn = "0926-860X",
publisher = "Elsevier",

}

Dual role of ferric chloride in modification of USY catalyst for enhanced olefin production from refinery fuel oil. / Shirvani, Samira; Ghashghaee, Mohammad; Kegnæs, Søren.

In: Applied Catalysis A: General, Vol. 580, 2019, p. 131-139.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Dual role of ferric chloride in modification of USY catalyst for enhanced olefin production from refinery fuel oil

AU - Shirvani, Samira

AU - Ghashghaee, Mohammad

AU - Kegnæs, Søren

PY - 2019

Y1 - 2019

N2 - Herein, ultra-stable Y zeolite (USY) catalysts modified with iron doping (1, 3, and 5 wt%) using FeCl3•6H2O as a precursor have been investigated. Detailed characterization of the synthesized catalysts was implemented through different analytical techniques including XRD, FTIR, UV–vis DRS, NH3-TPD, H2-TPR, N2 physisorption, EDX, FESEM, ICP-EOS, and XRF. The strong Lewis acidity of the precursor bestowed improved acidic properties to the parent USY besides a satisfactory partial dealumination of the zeolite structure. The optimal dispersion and structural properties were obtained in the case of 1 wt% doping of iron, which eventually led to superb olefin productivity (more than 56 wt%) in the upgrading of refinery fuel oil at mild operating conditions (atmospheric pressure and 550 °C). The optimum catalyst (1Fe/USY) has undergone further experiments with varying temperatures and space velocities to assess the apparent kinetics based on the Arrhenius model. A threefold increase in the space velocity (from 18.3 to 54.9 h–1) only slightly reduced the olefin productivity of the catalyst (to 47.1 wt%), which was still notable from a heavy feedstock. Reduction of the reaction temperature to 450 °C led to a decrease in the olefins yield to less than a half (23.3 wt%). Overall, the modified catalysts were capable of producing a high amount of light olefins from heavy fuel oil, with an orientation toward propylene as the most favored building block in the petrochemical industries.

AB - Herein, ultra-stable Y zeolite (USY) catalysts modified with iron doping (1, 3, and 5 wt%) using FeCl3•6H2O as a precursor have been investigated. Detailed characterization of the synthesized catalysts was implemented through different analytical techniques including XRD, FTIR, UV–vis DRS, NH3-TPD, H2-TPR, N2 physisorption, EDX, FESEM, ICP-EOS, and XRF. The strong Lewis acidity of the precursor bestowed improved acidic properties to the parent USY besides a satisfactory partial dealumination of the zeolite structure. The optimal dispersion and structural properties were obtained in the case of 1 wt% doping of iron, which eventually led to superb olefin productivity (more than 56 wt%) in the upgrading of refinery fuel oil at mild operating conditions (atmospheric pressure and 550 °C). The optimum catalyst (1Fe/USY) has undergone further experiments with varying temperatures and space velocities to assess the apparent kinetics based on the Arrhenius model. A threefold increase in the space velocity (from 18.3 to 54.9 h–1) only slightly reduced the olefin productivity of the catalyst (to 47.1 wt%), which was still notable from a heavy feedstock. Reduction of the reaction temperature to 450 °C led to a decrease in the olefins yield to less than a half (23.3 wt%). Overall, the modified catalysts were capable of producing a high amount of light olefins from heavy fuel oil, with an orientation toward propylene as the most favored building block in the petrochemical industries.

KW - Catalytic cracking

KW - Fuel oil

KW - Iron

KW - Light olefins

KW - USY

KW - Zeolite

U2 - 10.1016/j.apcata.2019.05.010

DO - 10.1016/j.apcata.2019.05.010

M3 - Journal article

VL - 580

SP - 131

EP - 139

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

ER -