Browsing by Author "Asere, A.A."

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    Comparison of the Elemental Structure and Emission Characteristics of Selected PVC and Non PVC Ceiling Materials Available in Nigerian Markets
    (International Journal of Applied Engineering Research, 2017) Dirisu, J.O; Asere, A.A.; et, al
    The recurring fire outbreak in buildings in Nigeria is quite alarming, just as the shift to the use of PVC as a choice for ceiling material due to its aesthetic appearance is on the increase. Hence this study determined the emission characteristics PVC and non-PVC samples. This was done with a view to establishing their suitability as ceiling materials in building designs for tropical countries and providing thermal and combustion data for building stakeholders that could help to checkmate man made fire disasters. This experiment involves the burning of a consistent mass, 50g of 6 samples of 3 PVC and 3 non-PVC in an open furnace where the combustion is carefully controlled. It investigates the flue gasses concentration emitted in the cause of fire outbreak and its effect on occupants. It responds to the question in mind that not only visible flame kills but also toxicity from flue gas can be detrimental to health of victims. The results showed that PVC samples are unwelcome in terms of their emission characteristics which were due to their elemental makeup of their composites such as PVC recorded highest Carbon composition of 77.9% and lowest oxygen composition of 18.0 %. VOCs are cancerous, cause dizziness, rapid heartbeat, vomiting and eventual death. Benzene, a known VOC, is used in making PVC which is a human carcinogen compound. Ceiling materials that will achieve low noxious emission and as well fire retardant should be investigated and employed for use. These materials can be improved upon to achieve environmental friendly building materials.
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    EMISSION CHARACTERISTICS OF LIQUEFIED PETROLEUM GAS COMBUSTION IN A PREMIXED SWIRL BURNER
    (Ife Journal of Technology, 2010) Akinlalu, B.Z.; Asere, A.A.
    Liquefied petroleum gas (LPG) is widely used as a fuel in domestic and industrial heating appliances throughout the world because its combustion products are relatively clean. However, due to its direct association with people, its combustion pollutants are of great concern. To this end, a study was carried out to investigate the effects of swirl intensity and equivalence ratio on emission produced during combustion of liquefied petroleum gas under fuel-lean conditions in a premixed swirl burner. Experiments were carried out using liquefied petroleum gas whose composition is 75% butane, 25% propane and air as charge. Tests were done for vane angles between 35 and 60o in steps of 5o. Employing EGA4 gas Analyzer in measuring NOx and COx emission level, it is shown that emission levels were strongly influenced by swirl intensity and equivalence ratio that strongly decrease pollutant emissions. Between equivalence ratio of 0.65 and 0.90, NOx emission of less than 5ppm and CO emission of less than 60ppm were achieved. Result also showed that at temperature ranges between 927oC and 1012oC, NOx and CO emission generated from combustion of LPG were low.
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    Optimization and modeling of process parameters on the yield of enhanced pyrolysis oil during co-pyrolysis of cassava peel with polystyrene
    (Environmental Challenges by Elsevier, 2021-10) Adeboye, B.S.; Adewole, B.Z.; Adedoja, A.M.; Obayopo, S.O.; Asere, A.A.; Kayode, O.; Idris, M.O.; Okediran, I.K.
    The co-pyrolysis of cassava peel (CP) and a synthetic waste, that is polystyrene (PS) has been investigated to optimize the yield of biofuel with improved properties. The main and interaction effects of process variables (temperature, feedstock ratio, and pyrolysis time) on the yield of pyrolysis oil were modeled and the optimal condition for enhanced pyrolysis oil yield was determined using response surface methodology by employing the central composite design matrix. A model equation was generated using the data obtained and the significance of the model was investigated using analysis of variance to determine if the fit of multiple regressions was significant. Some physical properties of the pyrolysis oil at the optimum condition were determined to investigate the suitability of the pyrolysis oil as a fuel source. From the statistical analysis, the study concluded that the feedstock ratio has the most significant effect on the yield of pyrolysis oil.
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    A REVIEW OF THE ENERGY SITUATION IN UGANDA
    (International Journal of Scientific and Research Publications,, 2014-01) Adeyemi, K.O.; Asere, A.A.
    This paper reviews the energy sector of Uganda. As is typical of East Africa, it is characterized by excessive use of Biomass to provide over 90% of the energy needs. Uganda is one of the least developed countries in the region. Hydropower provides over 90% of the total electricity generated in the country while wind, solar and geothermal are under developed. Energy policies are geared towards the use of modern, clean and energy efficient technologies. This is stimulating public private partnerships, attracting multilateral and bilateral agencies to provide funding, grants and technical assistance in renewable energy projects. The Clean Development Mechanism (CDM) of the United Nations avail project developers the opportunity to obtain carbon finance. Several challenges hindering the development in the energy sector and utilization of renewable energy resources have been identified. Strategies for achieving the United Nations Sustainable Energy for All Initiative have been presented.