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, Pages 3801-3810 PDF (679.55 K) | ||
| Document Type: Review Articles | ||
| DOI: 10.21608/ejchem.2020.24452.2457 | ||
| Authors | ||
| Asmaa I. Zahran* 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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