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 language | English |
|---|---|
| Journal | Applied Catalysis A: General |
| Volume | 580 |
| Pages (from-to) | 131-139 |
| Number of pages | 9 |
| ISSN | 0926-860X |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Catalytic cracking
- Fuel oil
- Iron
- Light olefins
- USY
- Zeolite
Cite this
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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 journal › Journal article › Research › peer-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 -