Browsing by Author "Ogunniyi, D.S."
Now showing 1 - 10 of 10
Results Per Page
Sort Options
Item Improving Jatropha curcas Linneaus seed oil alkyd resins(Elsevier, 2012) Odetoye, T.E; Ogunniyi, D.S.; Olatunji, G.A.The Jatropha curcas Linnaeus (JCL) oil was extracted, refined and modified through epoxidation, hydroxylation and dehydration steps in order to increase the degree of unsaturation in the oil alkyl chain. The modified oil was subsequently used for alkyd resin preparation (50% oil formulation) using a two-stage alcoholysis-polyesterification method. Drying performances of white gloss paints formulated from the desaturated oil alkyd, considering a pigment-volume concentration of 20.67% gave improved results. Blending of the improved 50% JCL oil alkyd with acrylic further enhanced the drying properties and compare well with commercial standards. White gloss paint formulated from the improved JCL alkyd–acrylic blends (1:3) dried hard within 2 h at an outdoor temperature of 37 °C ± 2.Item Improving Jatropha curcas Linneaus seed oil alkyd resins(Wiley, 2012) Odetoye, T.E; Ogunniyi, D.S.; Olatunji, G.A.The Jatropha curcas Linnaeus (JCL) oil was extracted, refined and modified through epoxidation, hydroxylation and dehydration steps in order to increase the degree of unsaturation in the oil alkyl chain. The modified oil was subsequently used for alkyd resin preparation (50% oil formulation) using a two-stage alcoholysis-polyesterification method. Drying performances of white gloss paints formulated from the desaturated oil alkyd, considering a pigment-volume concentration of 20.67% gave improved results. Blending of the improved 50% JCL oil alkyd with acrylic further enhanced the drying properties and compare well with commercial standards. White gloss paint formulated from the improved JCL alkyd–acrylic blends (1:3) dried hard within 2 h at an outdoor temperature of 37 °C ± 2.Item Preparation and evaluation of Jatropha curcas Linneaus seed oil alkyd resins(Elsevier, 2010) Odetoye, T.E; Ogunniyi, D.S.; Olatunji, G.A.Jatropha curcas Linnaeus (JCL) seed oil was utilized in the preparation of four sets of alkyd resin (35%, 50%, 60% and 75% oil formulations) using a two-stage alcoholysis–polyesterification method. The rates of polyesterification depended on the amount of oil used during synthesis. The properties of the alkyds were evaluated. The range of solidification times was between 278 and 442 s; also the range of film thickness was between 0.014 and 0.08 mm, and the alkyds were readily soluble in turpentine, xylene and butanol. Inclusion of cobalt naphthenate as drier and outdoor temperature (37 °C ± 2) improved the drying properties of all the alkyds. The colours of white gloss paints formulated from the alkyds, considering a pigment-volume concentration of 20.67% in the gloss paint formulation, compared well with that of a paint formulated using a commercial alkyd sample. 1H NMR analysis confirms the expected structure of the alkyds.Item Preparation and Evaluation of Tobacco Seed Oil-Modified Alkyd Resins(Elsevier, 2008) Ogunniyi, D.S.; Odetoye, T.EFour sets of alkyd resins modified by varying the percentage of tobacco seed oil (TSO) contents were prepared according to the alcoholysis-polyesterification process. The effect of oil contents on properties such as the drying performance, thickness of film, solubility, viscosity and color of the alkyd resins was evaluated. The alkyd with the least oil content was the most rapid drying, most viscous and darkest in color. Also, the prepared alkyds and the commercial alkyds were used separately in the formulation of white gloss paints and the properties of the alkyds were found to be comparable with commercial samples.Item Production and characterization of biodiesel using palm kernel oil, fresh and recovered from spent bleaching earth(Green Wave Publishing of Canada, 2014) Aladetuyi, A.; Olatunji, G.A.; Ogunniyi, D.S.; Odetoye, T.E.; Oguntoye, S.O.Palm kernel oil (PKO) was recovered from spent bleaching earth with a yield of 16 %, using n-hexane while the fresh oil was extracted from palm kernel with n-hexane and a yield of 40.23% was obtained. These oils were trans-esterified with methanol under the same reaction conditions: 100 oC, 2 h reaction time, and oil-methanol ratio of 5:1 (w/v). The cocoa pod ash (CPA) was compared with potassium hydroxide (KOH) as catalyst. The percentage yields of biodiesel obtained from PKO catalysed by CPA and KOH were 94 and 90%, respectively. While the yields achieved using the recovered oil catalysed by CPA and KOH were measured at 86 and 81.20 %. The physico-chemical properties of the biodiesel produced showed that the flash point, viscosity, density, ash content, percentage carbon content, specific gravity and the acid value fell within American Society for Testing and Materials (ASTM) specifications for biodiesel. The findings of this study suggest that agricultural residues such as CPA used in this study could be explored as alternatives for KOH catalyst for biodiesel production.Item Production of Biodiesel from Parinari polyandra B. Seed Oil using Bio-Based Catalysts(Faculty of Engineering & Technology, University of Ilorin, 2016) Amos, O; Ogunniyi, D.S.; Odetoye, T.E.Two agricultural residues, cocoa pod ash (CPA) and rice husk ash (RHA), were investigated as bio-based catalysts for the transesterification of Parinari polyandra seeds oil and the results obtained using these bio-based catalysts were compared with potassium hydroxide which is a conventional catalyst. Oil was extracted from parinari seeds and a yield of 57% was obtained. Cocoa pod and rice husks were ashed in muffle furnace at 600 oC and then characterized. Atomic Absorption Spectrometric analysis indicated the metal constituents of CPA as 13.05 ppm potassium, 6.65ppm sodium while RHA contained 3.24 ppm potassium, 1.748 ppm sodium, 0.053 ppm iron, 1.575 ppm magnesium, 2.325 ppm calcium and 0.009 ppm aluminum. Various concentrations of KOH, CPA and RHA (0.5-0.4%) were investigated in the transesterification reactions. Methanol - to - oil ratio of 6:1 with 1% KOH, 2% RHA and 4% CPA catalysts gave good biodiesel yields. The biodiesel yields of 99.94%, 98.61% and 88.85% were obtained with 1% KOH, 4% CPA and 2% RHA catalysts respectively. The properties of the biodiesel produced were determined and found to fall within the ASTM specification for standard biodiesels.Item A Review of Biofuels Research in Nigeria(Faculty of Engineering, University of Maiduguri, Maiduguri, Nigeria., 2019) Odetoye, T.E.; Ajala, E.O.; Ogunniyi, D.S.Biofuels are attracting a lot of research attention as a source of renewable energy due to environmental benefits and prospects of energy security. The expectation of the global community is particularly high towards Sub-Saharan African countries like Nigeria to meet the growing bioenergy needs by harnessing the abundant supply of biomass feedstock. However, lack of home-grown technology has been one of the major drawbacks of biofuel industrialization in Nigeria. Although a reasonable amount of biofuel research effort has been embarked on locally in Nigeria, most of these research works have remained on the shelf instead of being translated into commercial production. This paper reviews some biofuel research work done on Nigerian biomass. It recommends that funding the existing and new biofuel research work in Nigeria and channeling research towards industrialization as important drivers towards biofuel production in Nigeria.Item Studies on the preparation of Parinari polyandra Benth seed oil alkyd resins(Wiley, 2013) Odetoye, T.E; Ogunniyi, D.S.; Olatunji, G.A.Parinari polyandra Benth seed oil was utilized in the preparation of four sets of alkyd resin (35%, 50%, 60%, and 75% oil formulations) using a two‐stage alcoholysis‐polyesterification method. The rate of polyesterification was depended on the amount of oil used during synthesis. The properties of the alkyds (drying times, film characteristics, water and acid resistances, and solubility) were evaluated using relevant standards. Inclusion of cobalt naphthenate drier in the alkyds and their exposure to outdoor temperature improved the drying properties. White gloss paints formulated from the alkyds, considering a pigment‐volume concentration of 20.67% in the gloss paint formulation compare well with commercial standard. FTIR and 1H‐NMR analysis confirm the alkyd (glycerol‐phthalate) structure.Item Studies on the preparation of Parinari polyandra Benth seed oil alkyd resins(Wiley, 2013) Odetoye, T.E.; Ogunniyi, D.S.; Olatunji, G.A.Parinari polyandra Benth seed oil was utilized in the preparation of four sets of alkyd resin (35%, 50%, 60%, and 75% oil formulations) using a two‐stage alcoholysis‐polyesterification method. The rate of polyesterification was depended on the amount of oil used during synthesis. The properties of the alkyds (drying times, film characteristics, water and acid resistances, and solubility) were evaluated using relevant standards. Inclusion of cobalt naphthenate drier in the alkyds and their exposure to outdoor temperature improved the drying properties. White gloss paints formulated from the alkyds, considering a pigment‐volume concentration of 20.67% in the gloss paint formulation compare well with commercial standard. FTIR and 1H‐NMR analysis confirm the alkyd (glycerol‐phthalate) structure.Item Trans-esterification of tobacco seed oil using some agricultural wastes as catalysts(Nigerian Society of Chemical Engineers, 2017) Motojesi, O.; Ogunniyi, D.S.; Odetoye, T.EFatty acid methyl esters were produced from tobacco seed oil having high free fatty acid (FFA) content (13.02%). The high FFA content of tobacco seed oil was reduced to less than 2% in a 1 h reaction by a two-step process. The first step was acid-catalysed esterification reaction conducted at 50 oC using 1% w/w H2SO4, 18:1 molar ratio methanol with respect to the high FFA tobacco seed oil to produce methyl ester by lowering the acid value. The second step was transesterification of the treated oil obtained using 6:1 methanol to oil ratio. The following catalysts:1%w/w KOH, 2%w/w cocoa pod ash and 2%w/w rice husk ash were employed to produce fatty acids methyl esters at 65oC. The yields for fatty acids methyl esters obtained were 96%, 94.6% and 82% in 2h for KOH, cocoa pod ash and rice husk ash catalysts respectively.