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Emissions from multiple-spouted and spout-fluid fluidized beds using rice husks as fuel

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  • Albina, D.O.

Abstract

This paper presents the experimental results of the emissions of CO and CO2 using rice husks as fuel on different configurations of spout-sluidized beds namely, multiple-spouted and spout-fluid fluidized bed. The emission of pollutants from the multiple-spouted bed and spout-fluid bed was investigated with rice husk fuel. The operating parameters considered were the different levels of excess air, different primary-to-secondary air ratios at each level of excess air and method of feeding. It was found that emission of CO from the multiple-spouted bed seemed to be lower with under-bed feeding of the rice husk fuel compared to over-bed feeding. However, the emission of CO2 did not change significantly for both methods of feeding. Changes in excess air levels influenced the emissions of CO and CO2 from the multiple-spouted bed within the excess air range investigated. It was found that emission of CO was less at 10% excess air with over-bed feeding; emission of CO in the case of under-bed feeding was lowest at 20% excess air level. It was found that the method of feeding had not significantly influenced the emission of CO and CO2 in the spout-fluid bed. The combustion efficiency however, in general, was slightly higher in the case of under-bed feeding compared to over-bed feeding. Emission of CO was less in the spout-fluid bed compared with the emission of CO in the multiple-spouted bed. The result can be likely attributed to the higher combustion efficiency attained by the spout-fluid bed compared with that of multiple-spouted bed.

Suggested Citation

  • Albina, D.O., 2006. "Emissions from multiple-spouted and spout-fluid fluidized beds using rice husks as fuel," Renewable Energy, Elsevier, vol. 31(13), pages 2152-2163.
    • Handle: RePEc:eee:renene:v:31:y:2006:i:13:p:2152-2163
    DOI: 10.1016/j.renene.2006.02.013
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    Citations

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    Cited by:

    1. S. D. S. Piyathissa & P. D. Kahandage & Namgay & Hao Zhang & Ryozo Noguchi & Tofael Ahamed, 2023. "Introducing a Novel Rice Husk Combustion Technology for Maximizing Energy and Amorphous Silica Production Using a Prototype Hybrid Rice Husk Burner to Minimize Environmental Impacts and Health Risk," Energies, MDPI, vol. 16(3), pages 1-19, January.
    2. Ismail, T.M. & El-Salam, M. Abd, 2015. "Numerical and experimental studies on updraft gasifier HTAG," Renewable Energy, Elsevier, vol. 78(C), pages 484-497.
    3. Cristina Moliner & Filippo Marchelli & Barbara Bosio & Elisabetta Arato, 2017. "Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up," Energies, MDPI, vol. 10(11), pages 1-39, October.
    4. Filippo Marchelli & Giorgio Rovero & Massimo Curti & Elisabetta Arato & Barbara Bosio & Cristina Moliner, 2021. "An Integrated Approach to Convert Lignocellulosic and Wool Residues into Balanced Fertilisers," Energies, MDPI, vol. 14(2), pages 1-15, January.
    5. Nadaleti, Willian Cézar, 2019. "Utilization of residues from rice parboiling industries in southern Brazil for biogas and hydrogen-syngas generation: Heat, electricity and energy planning," Renewable Energy, Elsevier, vol. 131(C), pages 55-72.
    6. Kuprianov, Vladimir I. & Kaewklum, Rachadaporn & Sirisomboon, Kasama & Arromdee, Porametr & Chakritthakul, Songpol, 2010. "Combustion and emission characteristics of a swirling fluidized-bed combustor burning moisturized rice husk," Applied Energy, Elsevier, vol. 87(9), pages 2899-2906, September.
    7. Yoon, Sang Jun & Son, Yung-Il & Kim, Yong-Ku & Lee, Jae-Goo, 2012. "Gasification and power generation characteristics of rice husk and rice husk pellet using a downdraft fixed-bed gasifier," Renewable Energy, Elsevier, vol. 42(C), pages 163-167.

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