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Catalytic and non-catalytic synergistic effects and their individual contributions to improved combustion performance of coal/biomass blends

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  • Oladejo, Jumoke
  • Adegbite, Stephen
  • Gao, Xiang
  • Liu, Hao
  • Wu, Tao

Abstract

This study focuses on the synergistic properties of three types of coal when co-fired with oat straw at different blending ratios. The results demonstrated non-additive interaction between oat straw and coal samples. The catalytic effect of oat straw ash and the non-catalytic effect of its organic constituents on these coal samples were isolated and analysed to measure their contribution to the confirmed synergistic effects during co-firing. The results showed a level of synergy suppression between catalytic and non-catalytic effects due to the overlapping function of the catalytic AAEMs and the radical propagation promoted by organic content of biomass. A novel index, i.e., synergy combination efficiency, was therefore proposed and used to quantify the level of synergistic promotion or synergistic inhibition occurring during the co-firing of these fuel blends. It was found that at a blending ratio of 30 wt% oat straw, the Guizhou coal achieved a synergy factor (S.F) of 1.50, with non-catalytic and catalytic synergy contributing 69.1% and 30.9% respectively. This coal blend showed the highest synergistic promotion with a combined efficiency of 194%, which demonstrated the potential of the use of co-firing synergy to improve combustion performance of poor quality coals.

Suggested Citation

  • Oladejo, Jumoke & Adegbite, Stephen & Gao, Xiang & Liu, Hao & Wu, Tao, 2018. "Catalytic and non-catalytic synergistic effects and their individual contributions to improved combustion performance of coal/biomass blends," Applied Energy, Elsevier, vol. 211(C), pages 334-345.
    • Handle: RePEc:eee:appene:v:211:y:2018:i:c:p:334-345
    DOI: 10.1016/j.apenergy.2017.11.052
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    2. Shi, Kaiqi & Oladejo, Jumoke Mojisola & Yan, Jiefeng & Wu, Tao, 2019. "Investigation on the interactions among lignocellulosic constituents and minerals of biomass and their influences on co-firing," Energy, Elsevier, vol. 179(C), pages 129-137.
    3. Kai Wang & Jianliang Zhang & Shengli Wu & Jianlong Wu & Kun Xu & Jiawen Liu & Xiaojun Ning & Guangwei Wang, 2022. "Feasibility Analysis of Biomass Hydrochar Blended Coal Injection for Blast Furnace," Sustainability, MDPI, vol. 14(17), pages 1-17, August.
    4. Wu, Zhiqiang & Zhang, Jie & Zhang, Bo & Guo, Wei & Yang, Guidong & Yang, Bolun, 2020. "Synergistic effects from co-pyrolysis of lignocellulosic biomass main component with low-rank coal: Online and offline analysis on products distribution and kinetic characteristics," Applied Energy, Elsevier, vol. 276(C).
    5. Inayat, Muddasser & Sulaiman, Shaharin A. & Kurnia, Jundika Candra & Shahbaz, Muhammad, 2019. "Effect of various blended fuels on syngas quality and performance in catalytic co-gasification: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 105(C), pages 252-267.

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