Abstract
Fluidized bed combustion (FBC) technology has the potential to use alternative fuel sources such as coal, wood, or waste and it has the ability to reduce and control the emissions of oxides of nitrogen (NOx) and sulphur (SOx). This technology is capable of alleviating the energy problems of the Nigerian nation—a country with billions of tonnes of untapped coal and ironically with gross insufficient electrical energy supply. The aim of this research is to investigate the applicability of this technology to Nigerian low-grade coals (Enugu sub-bituminous coal). To achieve this, a pilot fluidized bed combustor of 3 m tall and 155 mm diameter was fabricated. The experiment was carried out using Enugu sub-bituminous coal of size 850 µm. The effect of coal batch sizes was investigated by feeding the coal over-bed in batches of 0.15, 0.25, 0.35, 0.45 kg/batch. The bed and free-board temperatures were measured using digital thermocouples and the pressure drop was monitored using an orifice meter. The minimum fluidization velocity was obtained to be 1.64 and 1.91 m/s for a coal batch feed of 150 and 450 g respectively.
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References
Oka SN (2004) Fluidized bed combustion. Mercel Dekker Inc., New York
World Coal Association. http://www.worldcoal.org/coal/uses-of-coal/coalelectricity/. Accessed 01 Dec 2015
Pope CA, Thun M, Namboodiri M, Dockery D, Evans J, Speizer F, Heath C (1995) Particulate air pollution as a predictor of mortality in a prospective study of U.S. adults. Am J Resp Crit Care Med 151:669–674
Adeyinka AJ (1997) Gasification of Nigerian coals in fluidized bed. PhD thesis, Federal University of Technology, Minna, Nigeria
Akinbode FO (1985) The potential application of fluidized bed to power generating schemes. Niger Eng 20(2):62–71
Kuni D, Levenspiel O (1969) Fluidisation engineering. Willey, New York
Ergun S, Orning AA (1952) Fluid flow through packed columns. Chem Eng Prog 48:89–94
Kececioglu I, Jiang Y (1994) Flow through porous media of packed spheres saturated with water. Trans ASME 116:164–170
Wen CY, Yu YH (1966) A generalized method for predicting the minimum fluidization velocity. AIChE 12:610–612
Rajans RR, Wen CY (1980) A comprehensive model for fluidized bed coal combustors. AlChE 26:642–655
Johnson JL (1979) Kinetics of coal gasification. The Institute of Gas Technology, Wiley, New York
Pillay VL (1987) Analysis of hydrodynamics phenomena and engineering development of a circulation fluidized bed for coal gasification. Master thesis, Natal University, South Africa
Saxena SC, Mathur A, Zang ZF (1986) Hydrodynamic characteristics of the gas fluidized beds over a broad temperature range. Powder Technol 47:247–256
La Nauze RD (1985) Fundamentals of coal combustion in fluidized beds. Chem Eng Res Des 63:1–30
Davidson JF (1992) Proceedings of the seventh engineering foundation conference and fluidisation, pp 1–14
Broughton J, Howard JR (1983) Combustion of coal in fluidized beds. In: Howard JR (ed) Fluidized beds. Applied Sciences Publishers, London, pp 37–76
Leye M, Amoo L (2015) Computational fluid dynamics simulation of Lafia-Obi bituminous coal in a fluidized-bed chamber for air- and oxy-fuel combustion technologies. Fuel 140:178–191
Borodulya VA (2007) Fluidized bed combustion is the universal technology of firing fossil fuels and various types of wastes. Adv Combust Aerotherm Technol 3:103–112
Hupa M (2007) Current status and challenges within fluidized bed combustion. Adv Combust Aerotherm Technol 5:87–101
Ogunsola OI (1991) Coal production and utilization trends in Nigeria. Fuel Sci Technol Int 9:1211–1222
EIA (2009) Country analysis brief-Nigeria, U.S. Energy Information Administration, May 2009. http://www.eia.doe.gov/emeu/cabs/Nigeria/Background.html. Accessed 01 Dec 2015
Oji JO, Idusuyi N, Kareem B (2012) Coal power utilization as an energy mix option for Nigeria: a review. AM Acad Sch Res J 4:1–5
P.M. News Nigeria. http://www.pmnewsnigeria.com/2013/08/19/nigeriasigns-3-7b-coal-mining-and-power-plant/. Accessed 01 Dec 2015
Ezekwe CI, Odukwe AO (1990) Coal in Nigeria. Energy 5:177–182
Ogunsola OI, Mikula RJ (1991) A study of spontaneouscombustion characteristics of Nigerian coals. Fuel 70:258–261
Nasir A, Mohammed SN, Mohammed A (2015) Performance of Enugu sub-bituminous coal in fluidized bed combustor. In: Lecture notes in engineering and computer science: proceedings of the World Congress on Engineering 2015 (WCE 2015), London, UK, pp 1102–1106, 1–3 July 2015
Acknowledgment
The authors wish to thank the management of the Federal University of Technology, Minna and the Tertiary Education Trust Fund (TETFund), Nigeria for funding the research.
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Nasir, A., Mohammed, S.N., Mohammed, A. (2016). Combustion of Coal in Fluidized Bed: Performance Analysis. In: Ao, Si., Yang, GC., Gelman, L. (eds) Transactions on Engineering Technologies. Springer, Singapore. https://doi.org/10.1007/978-981-10-1088-0_10
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DOI: https://doi.org/10.1007/978-981-10-1088-0_10
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