Faculty of Engineering

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Subject: search.filters.subject.Teak wood dust

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    Evaluation of Non-Isothermal Kinetic Parameters for Pyrolysis of Teak Wood using Model-Fitting Techniques
    (TRENDS IN SCIENCES, 2021-12-21) Adekunle Akanni Adeleke; Peter Pelumi Ikubanni; Jamiu Kolawole Odusote; Thomas Orhadahwe; Olumuyiwa A. Lasode; Samuel Adegoke; Olanrewaju Adesina
    Teak wood is one of the prominently used raw material in the construction industry, thus contributing extremely to the biomass waste available in Nigeria. These wastes are usually used for energy generation that requires upgrade into better fuel before application. Hence, the present study evaluates the non-isothermal kinetic parameters for pyrolysis of teak wood using model-fitting techniques. Teak wood dust was subjected to proximate, ultimate and calorific value analyses based on different ASTM standards. The thermal degradation and decomposition behaviour of the teak wood dust was examined using a thermogravimetric analyzer. Pulverized teak (6.5 mg) was heated from 30 to 800 ºC at varying heating rates (5, 10 and 15 ºC) in an environment where 100 mL/min of nitrogen gas was charged in continuously to maintain an inert condition. Avrami-Erofeev, Ginstling-Broushtein (GB) and Mampel models were used to evaluate the kinetic parameters of the pyrolysis of teak wood dust. The teak wood dust contained 7.25 % moisture, 79.26 % volatile matter (VM), 1.74 % ash and 11.75 % fixed carbon. The calorific value of the wood dust was 18.72 MJ/kg. The results of the thermogravimetric analyses depicted that heating rate has no effect on weight loss during the reactive drying zone. However, as the thermal treatment progressed into the active pyrolysis and passive pyrolysis zones, the weight loss decreased with increase in heating rate. The devolatilization parameters also increased with heating rates except for the maximum conversion. The results of the kinetic parameters evaluation revealed that the GB model was best fit to evaluate the kinetic parameters of teak in the active pyrolysis zone while GB and Mampel models were considered most appropriate for the evaluation of the kinetic parameters in the passive pyrolysis zone. Model-fitting method has the capacity to capture a wide range of fractional conversion at a glance
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    Physico-mechanical properties of cement bonded ceiling board developed from teak and African locust bean tree wood residue
    (Elsevier, 2021-02-17) I. O. Ohijeagbon; M.U. Bello-Ochende; Adekunle Akanni Adeleke; Peter Pelumi Ikubanni; A.A. Samuel; O. A. Lasode; O. D. Atoyebi
    Over the years, the pursuit for locally sourced economical and environmentally safe materials has been on the increase in the development of composite boards. These locally sourced materials are organic materials from plants and livestock such as wood residue, feathers, rice husk, maize husk and bamboo fiber. Therefore, this study utilizes species of wood residue in the development composite ceiling boards. Ceiling boards were developed from teak and African locust bean tree wood residue using cement as a binder. The ceiling boards were made by varying the composite mass of the mix and mixing ratio of wood dust to cement. A constant load of 5 kN was used for the compaction process using a hydraulic pressing machine. Physico-mechanical properties of the ceiling boards such as moisture content, density, water absorption, drying shrinkage, tensile strength, and compressive strength were evaluated. The percentage of moisture content were 9.50 and 14.50% for teak and African locust bean tree wood dust, respectively. The values of density varied from 0.56 − 0.68 g/cm3. The water absorption ranged from 9.0 to 39.8% after 24 h immersion and drying shrinkage ranged from 8.60 to 35%. The maximum impact energy obtained is 98 J. The highest tensile, compressive and flexural strengths for the ceiling boards were 1.09, 0.82, and 0.56 MPa, respectively. The composite samples showed that ceiling boards made from teak wood dust is most suitable for interior use. Cement was found to be suitable as a binder for the development of ceiling boards.