THERMODYNAMIC STUDY OF HYDROGEN PRODUCTION SYSTEM BY SUPERCRITICAL WATER GASIFICATION OF WHEAT STRAW COUPLED WITH PHOTOTHERMAL ENERGY STROAGE

Xue Qiangkun; Xu Hongpeng; Jia Ming; Sun Yuhao; Wu Shaohua

doi:10.19912/j.0254-0096.tynxb.2023-0778

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 170-178. DOI: 10.19912/j.0254-0096.tynxb.2023-0778

THERMODYNAMIC STUDY OF HYDROGEN PRODUCTION SYSTEM BY SUPERCRITICAL WATER GASIFICATION OF WHEAT STRAW COUPLED WITH PHOTOTHERMAL ENERGY STROAGE

Xue Qiangkun¹, Xu Hongpeng², Jia Ming¹, Sun Yuhao³, Wu Shaohua¹

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Abstract

In this paper, a system model of solar driven supercritical water gasification of wheat straw coupled with molten salt energy storage system is presented, which effectively overcomes the intermittency problem of solar energy, thus providing a new carbon neutral path for hydrogen production via biomass gasification. Thermodynamic analysis suggest that pyrolysis temperature and energy input are the main factors affecting the hydrogen yield of the system. The hydrogen yield reached the maximum under the conditions of high pyrolysis temperature （700 ℃） and low energy input （215.14 kW）. Owing to molten salt energy storage, the system could operate continuously throughout the whole day efficiently, with the energy efficiency and exergy efficiency reaching 36.3% and 36%, respectively.

Key words

biomass / gasification / solar energy / supercritical water / photothermal energy storage

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Xue Qiangkun, Xu Hongpeng, Jia Ming, Sun Yuhao, Wu Shaohua. THERMODYNAMIC STUDY OF HYDROGEN PRODUCTION SYSTEM BY SUPERCRITICAL WATER GASIFICATION OF WHEAT STRAW COUPLED WITH PHOTOTHERMAL ENERGY STROAGE[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 170-178 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0778

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