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In-situ monitoring of the transformation of ash upon heating and the prediction of ash fusion behaviour of coal/biomass blends

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  • Oladejo, Jumoke M.
  • Adegbite, Stephen
  • Pang, Chengheng
  • Liu, Hao
  • Lester, Edward
  • Wu, Tao

Abstract

In-situ monitoring of the impacts of biomass blending and temperature on the morphology of coal ash was conducted by using a scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDS) coupled with a heating stage and an ash fusion analyser. It is found that the interactions between ash originated from different parent fuels affected the morphology of the ash samples derived from the blends and promoted the rapid disintegration and melting of the ash particles. This helps reveal the deformation mechanism and the decrease in ash fusion temperatures of the fuel blends. Results showed that slagging propensity was mitigated as a result of blending the coal with the AAEMs-rich biomass, which is illustrated by the ash fusibility index. Subsequently, a new prediction method based on the mineral composition of the coal and biomass was formulated to elucidate the trends observed in fusion temperature of the fuel blends. This method can be used as a tool to guide the selection of biomass to adjust fusion characteristics of fuel blends.

Suggested Citation

  • Oladejo, Jumoke M. & Adegbite, Stephen & Pang, Chengheng & Liu, Hao & Lester, Edward & Wu, Tao, 2020. "In-situ monitoring of the transformation of ash upon heating and the prediction of ash fusion behaviour of coal/biomass blends," Energy, Elsevier, vol. 199(C).
    • Handle: RePEc:eee:energy:v:199:y:2020:i:c:s0360544220304370
    DOI: 10.1016/j.energy.2020.117330
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    2. Hariana, & Putra, Hanafi Prida & Prabowo, & Hilmawan, Edi & Darmawan, Arif & Mochida, Keiichi & Aziz, Muhammad, 2023. "Theoretical and experimental investigation of ash-related problems during coal co-firing with different types of biomass in a pulverized coal-fired boiler," Energy, Elsevier, vol. 269(C).
    3. Li, Fenghai & Zhao, Chaoyue & Fan, Hongli & Xu, Meiling & Guo, Qianqian & Li, Yang & Wu, Lishun & Wang, Tao & Fang, Yitian, 2022. "Ash fusion behaviors of sugarcane bagasse and its modification with sewage sludge addition," Energy, Elsevier, vol. 251(C).
    4. Ziqiang Yang & Fenghai Li & Mingjie Ma & Xuefei Liu & Hongli Fan & Zhenzhu Li & Yong Wang & Yitian Fang, 2023. "Regulation Mechanism of Solid Waste on Ash Fusion Characteristics of Sorghum Straw under O 2 /CO 2 Atmosphere," Energies, MDPI, vol. 16(20), pages 1-17, October.
    5. Li, Fenghai & Yang, Ziqiang & Li, Yang & Han, Guopeng & Fan, Hongli & Liu, Xuefei & Xu, Meiling & Guo, Mingxi & Fang, Yitian, 2023. "The effects of Na2O/K2O flux on ash fusion characteristics for high silicon-aluminum coal in entrained-flow bed gasification," Energy, Elsevier, vol. 282(C).
    6. Reinmöller, Markus & Schreiner, Marcus & Laabs, Marcel & Scharm, Christoph & Yao, Zhitong & Guhl, Stefan & Neuroth, Manuela & Meyer, Bernd & Gräbner, Martin, 2023. "Formation and transformation of mineral phases in biomass ashes and evaluation of the feedstocks for application in high-temperature processes," Renewable Energy, Elsevier, vol. 210(C), pages 627-639.
    7. Yue Jiao & Lina Tian & Shu Yu & Xudong Song & Zhiliang Wu & Juntao Wei & Jie Xu, 2023. "AAEM Species Migration/Transformation during Co-Combustion of Carbonaceous Feedstocks and Synergy Behavior on Co-Combustion Reactivity: A Critical Review," Energies, MDPI, vol. 16(22), pages 1-17, November.
    8. Jiang, Jiahao & Tie, Yuan & Deng, Lei & Che, Defu, 2022. "Influence of water-washing pretreatment on ash fusibility of biomass," Renewable Energy, Elsevier, vol. 200(C), pages 125-135.
    9. Zhu, Hongqing & Liao, Qi & Hu, Lintao & Xie, Linhao & Qu, Baolin & Gao, Rongxiang, 2023. "Effect of removal of alkali and alkaline earth metals in cornstalk on slagging/fouling and co-combustion characteristics of cornstalk/coal blends for biomass applications," Renewable Energy, Elsevier, vol. 207(C), pages 275-285.

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