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Experimental Investigation of the Ash Deposition Characteristics of Biomass Pretreated by Ash Removal during Co-Combustion with Sub-Bituminous Coal

Author

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  • Dae-Gyun Lee

    (School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Min-Jong Ku

    (School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Kyeong-Ho Kim

    (School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Jae-Sung Kim

    (School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Seung-Mo Kim

    (Pusan Clean Energy Research Institute, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Chung-Hwan Jeon

    (School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea
    Pusan Clean Energy Research Institute, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

Abstract

Although replacing biomass, (e.g., wood chips and pellets), with thinning wood and herbaceous biomass is eco-friendly and economically advantageous, their direct utilization in plant boilers is associated with ash-related challenges, including slagging and fouling. The aim of this study is to determine the effects of ash removal treatment (ashless biomass (ALB)) in the context of solid fuel power plant boilers. Ash was removed via neutralization of metal ions and carboxylic acids contained in the biomass ash. The ash removal rate of K, Na, Cl was indicated by assessing the total biomass before and after ash removal treatment, via XRF analysis. Co-combustion with sub-bituminous coal and ALB-treated biomass was analyzed using a drop tube furnace and revealed that NOx and SOx values converged converge toward an approximate 10 ppm error, whereas the Unburned Carbon (UBC) data did not exhibit a specific trend. Factors associated with slagging and fouling, (capture efficiency (CE), and energy based growth rate (GRE)) were calculated. All biomass samples without pretreatment exhibited V-shaped variation. Conversely, for ashless biomass (ALB) samples, CE and GRE gradually decreased. Thus, the ALB technique may minimize slagging and fouling in a boiler, thus, reducing internal corrosion associated with ash deposition and enhancing the economic operation of boilers.

Suggested Citation

  • Dae-Gyun Lee & Min-Jong Ku & Kyeong-Ho Kim & Jae-Sung Kim & Seung-Mo Kim & Chung-Hwan Jeon, 2021. "Experimental Investigation of the Ash Deposition Characteristics of Biomass Pretreated by Ash Removal during Co-Combustion with Sub-Bituminous Coal," Energies, MDPI, vol. 14(21), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7391-:d:673180
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    References listed on IDEAS

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    1. Xuejun Qian & Jingwen Xue & Yulai Yang & Seong W. Lee, 2021. "Thermal Properties and Combustion-Related Problems Prediction of Agricultural Crop Residues," Energies, MDPI, vol. 14(15), pages 1-18, July.
    2. Tae-Yong Jeong & Lkhagvadorj Sh & Jong-Ho Kim & Byoung-Hwa Lee & Chung-Hwan Jeon, 2019. "Experimental Investigation of Ash Deposit Behavior during Co-Combustion of Bituminous Coal with Wood Pellets and Empty Fruit Bunches," Energies, MDPI, vol. 12(11), pages 1-17, May.
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    Cited by:

    1. Yoonah Jeong & Jae-Sung Kim & Ye-Eun Lee & Dong-Chul Shin & Kwang-Ho Ahn & Jinhong Jung & Kyeong-Ho Kim & Min-Jong Ku & Seung-Mo Kim & Chung-Hwan Jeon & I-Tae Kim, 2023. "Investigation and Optimization of Co-Combustion Efficiency of Food Waste Biochar and Coal," Sustainability, MDPI, vol. 15(19), pages 1-12, October.
    2. Yonmo Sung, 2023. "Advances in Reduction Technologies of Gas Emissions (CO 2 , NO x , and SO 2 ) in Combustion-Related Applications," Energies, MDPI, vol. 16(8), pages 1-4, April.

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