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Browsing Articles by Author "Abubakar, A."

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    Design and Fabrication of Fluidized-Bed Reactor
    (Department of Chemical Engineering, Nasarawa State University Keffi, 2013-05-11) Yunusa, Suleiman; Ibrahim, H.; Anyakora, N.V.; Mohammed, F.; Abubakar, A.; Aderemi, B.O.; Okonkwo, P. C.
    A fluidized-bed reactor was designed and constructed for practical demonstration of the fluidization of solid particles at different fluid flow rates. The bed of this reactor was sand particles of average size 1800 μm ,weighed 0.6 N and the fluidizing fluidwas air. Alternatively, the fluidizing fluid can be substituted for any given gas by connecting the desired gas cylinder to the blower. The height of the bed was 25 mm on a mesh of 1230 μm. An air blower was designed to supply air from the room to fluidize the bed.The shaftand discharge powers of the blower were18.8kW and its efficiency was 70%. The minimum and maximum operating pressures were 0.1133 and 24.5262 mH2O and their corresponding velocities were 0.64 and 245.86 m/s respectively.This project was found suitable for undergraduates of Chemical Engineering and related studies for improved knowledge and practical skill required for effective and optimal performance in meeting industrial needs towards improved service delivery.
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    Optimization of Process Parameters for Catalytic Pyrolysis of Waste Tyre using Reactivated Fluid Catalytic Cracking Catalyst
    (Department of Chemical Engineering, Nasarawa State University Keffi, 2023-05-11) Obi, M. Bisong; Abubakar, A.; Yunusa, Suleiman; Mohammed, F.
    This work investigated the optimization of process parameters for catalytic pyrolysis of waste tyre using reactivated spent Fluid catalytic cracking (FCC) catalyst. The waste tyre pyrolysis used design expert software as the optimization tool for this study. A 3-factor level CCD with 20 experimental runs was used with temperature, time and catalyst as the input parameters while oil yield, density and viscosity were the output variables. Thereafter, an experimental validation of the optimized parameters, which were not among the original experimental runs, was carried out. Pyrolysis was also carried out at the optimized conditions with un-reactivated catalyst and without catalyst to ascertain the contributions of the catalyst and its reactivation. Based on the optimum parameters, 48.5 wt. % oil (0.79 g/ml and 2.05 cSt) was produced with the reactivated catalyst, 43.4 wt. % (0.86 g/ml and 3.52 cSt) was produced with spent catalyst, and 51 wt. % oil (0.95 g/ml and 4.24 cSt) was produced without catalyst. The oil yield without catalyst was higher than with reactivated catalyst (R-CAT); but it however had the lowest fuel qualities while oil produced with catalyst in turn had higher quantity and quality compared to oil produced with catalyst. Therefore, the incorporation of density and viscosity of the oil in the optimization of the catalytic pyrolysis of waste tyre enhanced the improvement of yield and quality of the oil produced.