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Determination of ash forming characteristics and fouling/slagging behaviours during gasification of masson pine in a fixed-bed gasifier

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  • Yao, Xiwen
  • Zhao, Zhicheng
  • Xu, Kaili
  • Zhou, Haodong

Abstract

In this paper, fly ash and bottom ash produced from the gasification of pine sawdust in a fixed bed gasifier were compared in details to investigate the ash forming characteristics and fouling/slagging behaviours. For this purpose, a detailed comparison of fly ash and bottom ash was carried out. It was found that compared with the ash composition of raw pine sawdust, gasification ashes showed higher contents of alkali metals (K, Na) and Cl. S. Both the bottom ash and fly ash were strongly crystalline, with calcite as the prevailing phase. The ash fusion temperatures for fly ash were higher than those for bottom ash, while the interval between the deformation temperature and softening temperature for bottom ash (88 °C) was larger than that for fly ash (73 °C), suggesting the higher fouling/slagging propensity of bottom ash. The Si/(Ca + Mg) ratio for the bottom ash (1.10) was lower than that for fly ash (1.29), further indicating the low melting of bottom ash. From a mineralogical standpoint, the major difference between fly ash and bottom ash was that the former possessed a higher content of potassium-rich salts that facilitated the adhesion of small particles to larger particles during biomass gasification process.

Suggested Citation

  • Yao, Xiwen & Zhao, Zhicheng & Xu, Kaili & Zhou, Haodong, 2020. "Determination of ash forming characteristics and fouling/slagging behaviours during gasification of masson pine in a fixed-bed gasifier," Renewable Energy, Elsevier, vol. 160(C), pages 1420-1430.
    • Handle: RePEc:eee:renene:v:160:y:2020:i:c:p:1420-1430
    DOI: 10.1016/j.renene.2020.06.008
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    References listed on IDEAS

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    1. Xiao, Ruirui & Chen, Xueli & Wang, Fuchen & Yu, Guangsuo, 2011. "The physicochemical properties of different biomass ashes at different ashing temperature," Renewable Energy, Elsevier, vol. 36(1), pages 244-249.
    2. Yao, Xiwen & Zhao, Zhicheng & Chen, Shoukun & Zhou, Haodong & Xu, Kaili, 2020. "Migration and transformation behaviours of ash residues from a typical fixed-bed gasification station for biomass syngas production in China," Energy, Elsevier, vol. 201(C).
    3. Yao, Xiwen & Zheng, Yan & Zhou, Haodong & Xu, Kaili & Xu, Qingwei & Li, Li, 2020. "Effects of biomass blending, ashing temperature and potassium addition on ash sintering behaviour during co-firing of pine sawdust with a Chinese anthracite," Renewable Energy, Elsevier, vol. 147(P1), pages 2309-2320.
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    4. 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).

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