Browsing by Author "Saka, Harvis B."

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    BIODIESEL PRODUCTION FROM PALM KERNEL OIL USING BENTONITE CLAY-SUPPORTED FE-CO NANOCATALYST
    (2020-11-21) Aderibigbe, Fatai A.; Adewoye, Tunmise L.; Mustapha, Sherif I.; Mohammed, Ishaq A.; Amosa, Mutiu K.; Saka, Harvis B.; Muhammed-Nuhu, Rafiat A.; Adejumo, Ayoade L.; Owolabi, Rasheed U.
    This study is focused on the development of a heterogeneous Fe-Co bimetallic nanoparticle on Pindiga bentonite clay support to be used in the production of biodiesel. The local clay was beneficiated and used in the preparation of catalyst by wet impregnation method. The X-ray Fluorescence analysis (XRF) of the bentonite clay showed the presence of several metals and metallic oxides with good catalytic effect. Characterization of the prepared catalyst using Fourier Transform Infared Ray (FTIR), Energy Dispersive Spectrometer,(EDS) X-Ray Dispersion (XRD) and Scanning Electron Microscopy (SEM) confirmed the functional groups, elemental compositions, crystallinity, and morphology of the catalyst respectively. The catalyst was evaluated in biodiesel production using Box-Behnken optimization by varying the methanol: oil mole ratio, reaction temperature, reaction time, and catalyst concentration. An optimum yield of biodiesel (93.8%) was obtained at process condition of 15: 1 methanol: oil mole ratio, 55 C reaction temperature, 1 h, reaction time, and 15%(w/w) catalyst concentration. Physicochemical properties of the biodiesel produced using the developed Fe-Co/bentonite nanocatalyst showed that the biodiesel is of good quality. This was further confirmed by the FAMEs profile. Therefore, the Fe-Co/bentonite nanocatalyst showed potential application as heterogeneous nanocatalyst for the trans-esterification of vegetable oil to biodiesel, an alternative and sustainable replacement for conventional petroleum diesel.
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    HETEROGENEOUS CATALYSIS USING BENTONITE SUPPORTED Fe-Co-Ni TRIMETALLIC NANOPARTICLES
    (2021) Aderibigbe, Fatai A.; Adewoye, Tunmise L.; Mustapha, Sherif I.; Mohammed, Ishaq A.; Saka, Harvis B.; Ajala, Elijah O.; Oluwaseyi, Soile S
    Herein, the synthesis and characterization of a bentonite-supported Fe-Co-Ni trimetallic nanocatalyst applied in transesterification reaction was reported. The synthesized heterogeneous catalyst was used to investigate the production of biodiesel by varying the reaction parameters using Box-Behnken design response surface methodology (RSM-BBD). An optimum biodiesel yield of 95.2% was obtained at methanol to oil ratio of 10: 1, reaction time of 2 hours, reaction temperature of 55 and catalyst concentration of 5%(w/w of the oil). The biodiesel produced was later analysed using GC-MS analysis and the results shows a fatty acid methyl esters (FAME) profile that confirms the presence of biodiesel.
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    PHENOL removal in refinery wastewater using mixed oxides prepared by green synthesis
    (2021-01-17) Aderibigbe, Fatai A.; Adewoye, Tunmise L.; Mustapha, Sherif I.; Mohammed, Ishaq A.; Saka, Harvis B.; Amosa, Mutiu K.; Adejumo, Ayoade L.; Owolabi, Rasheed U.; James, Shalom B.
    Mixed solid oxides are known for their excellent catalytic property and applications in environmental remediation. This study presents a green-synthesis route for magnesium oxide–titanium oxide, a mixed oxide here demonstrated to possess high performance of phenol removal from hydrocarbon refinery process wastewater. Mixed oxide (MgO-TiO 2) was prepared by using the whole extract from leaves of Piliostigma Thonningii as reducing agent. Structural characterization of the mixed oxide was done using X-ray Diffractometer, High Resolution Scanning Electronic Microscopy and Energy Dispersive X-ray. Petroleum refinery raw wastewater having phenol concentration of 19.961 mg/L was treated using the green-synthesized mixed oxide. Adsorptive phenols removal up to 99.5% was achieved with a dosage of 0.04 g/100 mL at temperature of 35 C, and contact time of 1.167 h. By this, the treated water meets the standard acceptable phenol concentration (0.1 mg/L) in wastewater of hydrocarbon refinery.
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    Qualitative role of heterogeneous catalysts in biodiesel production from Jatropha curcas oil
    (Alpha Creation Enterprise, 2020-06-01) Aderibigbe, Fatai A.; Mustapha, Sherif I.; Adewoye, Tunmise L.; Mohammed, Ishaq A.; Gbadegesin, Adebola B.; Niyi, Faith E.; Olowu, Opeyemi I.; Soretire, Akinpelumi G.; Saka, Harvis B.
    Biodiesel properties are in general attributed to the composition and properties of the oil feedstock used, overlooking the possible impacts of the catalyst preparation details. In light of that, the impacts of different catalyst preparation techniques alongside those of different support materials on the yield, composition, and fuel properties of biodiesels produced from the same oil feedstock were investigated. More specifically, tri-metallic (Fe-Co-Ni) catalyst was synthesized through two different techniques (green synthesis and wet impregnation) using MgO or ZnO as support material. The generated catalyst pairs, i.e., Fe-Co-Ni/MgO and Fe-Co-Ni/ZnO prepared by wet impregnation and Fe-Co-Ni-MgO and Fe-Co-Ni-ZnO prepared by green synthesis (using leaf extracts) were used in the transesterification process of Jatropha curcas oil. Detailed morphological properties, composition, thermal stability, crystalline nature, and functional groups characterization of the catalysts were also carried out. Using Box-Behnken Design response surface methodology, it was found that the green-synthesized Fe-Co-Ni-MgO catalyst resulted in the highest biodiesel yield of 97.9%. More importantly, the fatty acid methyl ester (FAME) profiles of the biodiesels produced using the four catalysts as well as their respective fuel properties were different in spite of using the same oil feedstock.