Fabrication of CoNiMo/γ-Al2O3 from waste aluminum foil to convert waste lube oil to hydrotreated oil

Q1 Earth and Planetary Sciences

Egyptian Journal of Petroleum Pub Date : 2021-12-01 DOI:10.1016/j.ejpe.2021.09.002

Asmaa A. Abdelrahman , Mohamed A. Sayed , Mohamed F. Menoufy , Abdelrahman M. Rabie

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引用次数: 3

Abstract

Because of the heavy metal content and other toxic chemicals, used lubricating oil remains one of the most serious environmental concerns. The target of this work is the synthesis of γ-Al₂O₃ from waste aluminum foil and re-refining waste lubricating oils using solvent extraction pursued by hydrotreatment. The trimetallic CoNiMo/γ-Al₂O₃ catalyst was prepared via a co-impregnation method. The support and tri-metallic supported alumina are characterized by N₂ adsorption–desorption techniques, X-ray diffraction (XRD), Raman spectroscopy, HRTEM, and EDX. The catalyst was evaluated in the hydrotreating of extracted waste lubricating oils. The results confirmed that the solvent to oil ratio of 3 gave the higher performance with the highest percent of sludge elimination at room temperature. Hydrotreating of extracted lube oil was investigated to determine the effect of variables such as temperature, pressure, liquid hour space velocity, and hydrogen to oil feed ratio. The results indicated that the optimum conditions are (temperature 400 °C, Pressure 60 bar, 0.75 h⁻¹ LHSV). The results showed improvement of the hydrotreated waste lubricating oils properties by decreasing the refractive index from 1.480 to 1.460, the total acid number decreased from 8.164 to 0. 459, the Viscosity Index increase from 78 to 129, and the Sulfur content decreased from 6752 ppm to 543 ppm.

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用废铝箔制备CoNiMo/γ-Al2O3将废润滑油转化为加氢处理油

由于含有重金属和其他有毒化学物质，二手润滑油仍然是最严重的环境问题之一。以废铝箔为原料合成γ-Al2O3，并对废润滑油进行溶剂萃取加氢精制。采用共浸渍法制备了三金属CoNiMo/γ-Al2O3催化剂。采用N2吸附-解吸技术、x射线衍射(XRD)、拉曼光谱、HRTEM和EDX对载体氧化铝和三金属载体氧化铝进行了表征。对该催化剂加氢处理萃取废润滑油进行了评价。结果表明，在室温条件下，溶剂油比为3时，污泥去除率最高，性能最好。研究了萃取润滑油的加氢处理，确定了温度、压力、液时空速、氢油比等变量对加氢处理的影响。结果表明，最佳工艺条件为温度400℃，压力60 bar, 0.75 h−1 LHSV。结果表明，加氢处理后的废润滑油的折射率由1.480降至1.460，总酸数由8.164降至0，性能得到改善。459时，粘度指数由78提高到129，硫含量由6752 ppm降低到543 ppm。

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来源期刊

Egyptian Journal of Petroleum Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

7.70

自引率

0.00%

发文量

审稿时长

84 days

期刊介绍： Egyptian Journal of Petroleum is addressed to the fields of crude oil, natural gas, energy and related subjects. Its objective is to serve as a forum for research and development covering the following areas: • Sedimentation and petroleum exploration. • Production. • Analysis and testing. • Chemistry and technology of petroleum and natural gas. • Refining and processing. • Catalysis. • Applications and petrochemicals. It also publishes original research papers and reviews in areas relating to synthetic fuels and lubricants - pollution - corrosion - alternate sources of energy - gasification, liquefaction and geology of coal - tar sands and oil shale - biomass as a source of renewable energy. To meet with these requirements the Egyptian Journal of Petroleum welcomes manuscripts and review papers reporting on the state-of-the-art in the aforementioned topics. The Egyptian Journal of Petroleum is also willing to publish the proceedings of petroleum and energy related conferences in a single volume form.