College of Engineering

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Author: search.filters.author.Oladimeji, Temitayo EEnd date: 2019

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    COMPARATIVE STUDY OF NON-METALLIC CONTENTS OF SAWDUST OF DIFFERENT WOOD SPECIES AND COAL SPECIES IN NIGERIA
    (Petroleum and Coal, 2019) Elehinafe, Francis Boluwaji; Okedere, Oyetunji Babatunde; Odunlami, Olayemi. Abosede; Oladimeji, Temitayo E; Mamudu, Angela Onose; Sonibare, Jacob Ademola
    The study assessed the non-metallic contents of sawdust samples by ultimate analysis and compared with those of coal species found in the literature. The results showed that the sawdust of the wood species have: carbon contents ranged from 43.78% for Uapaca heudelotii to 62.95% for Irvingia excels; hydrogen contents ranged from 4.35% for Entada gigas to 7.07% Parkia biglobosa;; sulphur contents ranged from 0.00% for Pterygota macrocarpa to 0.09% Spondias mombin; nitrogen contents ranged between 0.00% for Blighia sapida and 1.70% for Khaya ivorensis, and oxygen contents ranged between 30.08% Macaranga barteri and 50.61% Uapaca heudelotii. It was concluded that utilization of sawdust as energy source has minimal or no environmental concerns, unlike coal.
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    Air quality investigation over Moundou Chad
    (International Conference on Energy and Sustainable Environment, 2019) Emetere, M. E.; Oladimeji, Temitayo E
    The air quality over Moundou-Chad was examined using satellite dataset. Fifteen years aerosol optical depth (AOD) was obtained from the Multi-angle Imaging Spectro Radiometer (MISR). The AOD dataset is statisticaly stable for further prediction. The highest AOD mean was observed in 2008. The standard deviation, average deviation and coefficient of variation all agrees that the AOD dataset is reliable. It is shown that the aerosol loading over Moundou is high and the size of the aerosol is very tiny to deposit in the human lungs.
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    Preparation and characterization of activated carbon from plantain peel and coconut shell using biological activators
    (International Conference on Engineering for Sustainable World, 2019) Efeovbokhan, V. E; Alagbe, E. E.; Odika, B.; Babalola, R.; Oladimeji, Temitayo E; Abatan, Olubunmi G.; Yusuf E. O.
    A concern over the toxicity of chemicals used during the activation stage in the preparation of activated carbon is beginning to gain attention. The study therefore looked into the possibility of using bio-activators (lemon juice and potash leached from the peel of unripe plantain) as activating chemicals, for environmentally friendly activated carbon. Coconut shell and the peel from unripe plantain were used as feedstock and pyrolyzed at 400 and 450 0c. An impregnation ratio of 0.25:1 was used while laboratory grade potassium hydroxide was used as a base activating agent as a control setup. Characterization of the activated carbon was carried out using parameters like bulk density and yield which were obtained using standard procedures. Results showed that activating carbon using bio-activators as activating agents had very good characteristics when compared with the control. Bio-activators are therefore recommended for the production of bio based activated carbon especially in the fields of medicine, food and pharmaceuticals. The effect of carbonization temperature on adsorption efficiency and pore structure were investigated using methylene blue as adsorbate and SEM respectively
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    Industrial- and automotive-used lubricating oils recycling cum acidic sludge treatment
    (Springer, 2019) Oladimeji, Temitayo E; Oguntuashe, Kehinde M.; Emetere, Moses E.; Efeovbokhan, Vincent E.; Odunlami, Olayemi A.; Obanla, Oyinlola R.
    Increased rise of industries and car usage in Nigeria and urban development is exponentially on the increase giving rise to multiple waste generation. Evaluation of the different recycling processes showed that acid-clay process has the highest environmental risk as well as the lowest cost; hence, this work added a treatment method for the slurry produced after treatment with acid-clay method, thereby reducing the environmental concern caused by acid and acid sludge formed in the process. The acid ratio was varied between 0 and 20% and adsorbent ratio between 15 and 25%. Automotive-used lubricating oil and industrial-used lubricating oil were treated using two different samples, acid and adsorbent. An increase in acid concentration showed a significant difference over the properties of oil such as density, viscosity, flash point, and other physiochemical properties nevertheless increasing the amount of acid over the optimum point made on significant change. Varying of adsorbent ratio showed little significant effect to density and flash point, while yield and viscosity were unaffected. Optimum point being at 10% acid and 25% adsorbent gave optimal result. All metal contaminants are substantially removed; total base number was improved, while increase in flash point suggested the method effectiveness. Treatment of used industrial oil was found to be easier to re-refine due to less contamination.