Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3
I. Zahran, A., M.A. El Naggar, A., A. Aboutaleb, W., A. Sayed, M., S. Ahmed, H., A. Mekewi, M. (2020). Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3. EKB Journal Management System, 63(10), 3801-3810. doi: 10.21608/ejchem.2020.24452.2457
Asmaa I. Zahran; Ahmed M.A. El Naggar; Wael A. Aboutaleb; Mohamed A. Sayed; Huda S. Ahmed; Mohamed A. Mekewi. "Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3". EKB Journal Management System, 63, 10, 2020, 3801-3810. doi: 10.21608/ejchem.2020.24452.2457
I. Zahran, A., M.A. El Naggar, A., A. Aboutaleb, W., A. Sayed, M., S. Ahmed, H., A. Mekewi, M. (2020). 'Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3', EKB Journal Management System, 63(10), pp. 3801-3810. doi: 10.21608/ejchem.2020.24452.2457
I. Zahran, A., M.A. El Naggar, A., A. Aboutaleb, W., A. Sayed, M., S. Ahmed, H., A. Mekewi, M. Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3. EKB Journal Management System, 2020; 63(10): 3801-3810. doi: 10.21608/ejchem.2020.24452.2457

Enhancement of heavy vacuum gas oil desulfurization via using developed catalyst based on Al2O3

Egyptian Journal of Chemistry
Article 19, Volume 63, Issue 10, October 2020, Page 3801-3810  XML PDF (679.55 K)
Document Type: Review Articles
DOI: 10.21608/ejchem.2020.24452.2457
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Authors
Asmaa I. Zahran email 1; Ahmed M.A. El Naggar2; Wael A. Aboutaleb2; Mohamed A. Sayed2; Huda S. Ahmed3; Mohamed A. Mekewi4
1Egyptian petroleum research institute
2Egyptian Petroleum Research Institute, Cairo,Egypt
3Egyptian Petroleum Research Institute
4Faculty of science, Chemistry dept., Ain-Sham, University, Cairo, Egypt
Abstract
In past few decades, a strong attention is paid to develop high-active catalysts for hydrotreating of the heavy vacuum gas oil (HVGO). In an agreement with that claim, this research work reports the synthesis of a developed catalyst for desulfurization of a petroleum HVGO fraction. Particularly, the catalytic performance of the catalyst, which was made via addition of CeO2 to ɣ alumina as supports for a trimetallic composite (CoNiMo-Al2O3), toward sulfur removal was investigated. For proper comparison, the activity of alumina individually-supported trimetallic catalyst CoNiMo-ɣAl2O3 at such application was also studied. The as-prepared catalysts were characterized by N2 physical adsorption/desorption (BET), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Catalytic activity was conducted in continuous flow trickle-bed reactor at various operating condition of temperature (320-380 °C), pressure (20-60 bar) and liquid hour space velocity (1-2.5 h-1). It was found that CoNiMo/CeO2-ɣAl2O3 was of a higher catalytic efficiency to hydrotreating of HVGO than that of CoNiMo-Al2O3. Numerically, CoNiMo/CeO2-ɣAl2O3 could successfully remove 83.5 % of sulfur compounds while it was only 66.2% in case of CoNiMo-Al2O3. The increased catalytic performance of ceria containing composite may be due to its high specific surface area (∼198.4 m2·g−1) and small crystallite size (24.24 nm). Moreover, the incorporation of CeO2 to alumina could subsequently inhibit the interaction between Ni and alumina; hence the inactive NiAl2O4 phase had not been formed. Thus, an enhanced catalytic desulfurization process could be attained.
Keywords
Hydrodesulfurization; Vacuum gas oil; Ceria-alumina catalyst; Nickel-cobalt-Molybdenum catalyst; Trickle-bed reactor
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