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Experimental Study on the Preparation of Hydrogen-Rich Gas by Gasifying of Traditional Chinese Medicine Residue in a DFB Based on Calcium Looping

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  • Xiaoquan Zhou

    (Shandong Provincial Key Laboratory of Biomass Gasification Technology, Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Liguo Yang

    (Shandong Provincial Key Laboratory of Biomass Gasification Technology, Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Xiaoxu Fan

    (Shandong Provincial Key Laboratory of Biomass Gasification Technology, Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Xuanyou Li

    (Shandong Provincial Key Laboratory of Biomass Gasification Technology, Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

Abstract

Using traditional Chinese medicine residue biomass as the raw material and industrial limestone as a carbon absorbent, this paper investigates the production of hydrogen-rich synthesis gas in a pilot-scale calcium looping dual fluidized bed (DFB) system. The study focuses on analyzing the distribution characteristics of temperature and pressure, as well as the operation and control methods of the DFB system. The effects of reaction temperature, material layer height (residence time), water vapor/biomass ratio (S/B), and calcium/carbon molar ratio (Ca/C) on gasification products are examined. The experimental results demonstrate that as the temperature (600–700 °C), S/B ratio (0.5–1.5), Ca/C ratio (0–0.6), and other parameters increase, the gas composition shows a gradual increase in the volume content of H 2 , a gradual decrease in the volume content of CO, and an initial increase and subsequent decrease in the volume content of CH 4 . Within the range of operating conditions in this study, the optimal conditions for producing hydrogen-rich gas are 700 °C, an S/B ratio of 1.5, and a Ca/C ratio of 0.6. Furthermore, increasing the height of the material layer in the gasification furnace (residence time) enhances the absorption of CO 2 by the calcium absorbents, thus promoting an increase in the volume content of H 2 and the carbon conversion rate in the gas.

Suggested Citation

  • Xiaoquan Zhou & Liguo Yang & Xiaoxu Fan & Xuanyou Li, 2023. "Experimental Study on the Preparation of Hydrogen-Rich Gas by Gasifying of Traditional Chinese Medicine Residue in a DFB Based on Calcium Looping," Energies, MDPI, vol. 16(11), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4434-:d:1160243
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    References listed on IDEAS

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    1. Yan, Xianyao & Li, Yingjie & Ma, Xiaotong & Bian, Zhiguo & Zhao, Jianli & Wang, Zeyan, 2020. "CeO2-modified CaO/Ca12Al14O33 bi-functional material for CO2 capture and H2 production in sorption-enhanced steam gasification of biomass," Energy, Elsevier, vol. 192(C).
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