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Enhanced bio-hydrogen production by photo-fermentation of corn stalk using Fe-doped CaTiO3 photocatalyst

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Listed:
  • Yang, Xudong
  • Zhang, Huan
  • Zhang, Zhiping
  • Li, Yameng
  • Liu, Hong
  • Zhang, Feng
  • Xiang, Guanning
  • Zhang, Quanguo

Abstract

The aim of this study was to analyze the effects of CaTiO3 photocatalysts doped with different concentrations of Fe on the biohydrogen production process by photo-fermentation using corn stover as the substrate. The experimental results showed that the maximum cumulative hydrogen production and the maximum rate of hydrogen production were obtained when the doping concentration was 6 % (g/g) (380.8 mL, 26.4 mL/h), which were 63.4 % and 203.4 % higher, respectively, than those of the blank control group (233 mL, 8.7 mL/h). The substrate conversion rate was 32.82 %. Iron-doped CaTiO3 lowered the oxygen reduction potential in the fermentation system to provide a suitable reduction environment for the growth and fermentation of photosynthetic bacteria. The lowest redox potential observed was −393.5 mV for 6 % iron-doped CaTiO3. Thermogram analysis revealed a strong correlation between cumulative hydrogen production and redox potential. Additionally, the analysis of soluble small molecules showed that iron-doped CaTiO3 could inhibit the production of ethanol from glycolysis during fermentation and promote the utilization of small molecule acids.

Suggested Citation

  • Yang, Xudong & Zhang, Huan & Zhang, Zhiping & Li, Yameng & Liu, Hong & Zhang, Feng & Xiang, Guanning & Zhang, Quanguo, 2024. "Enhanced bio-hydrogen production by photo-fermentation of corn stalk using Fe-doped CaTiO3 photocatalyst," Energy, Elsevier, vol. 301(C).
    • Handle: RePEc:eee:energy:v:301:y:2024:i:c:s0360544224014555
    DOI: 10.1016/j.energy.2024.131682
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    References listed on IDEAS

    as
    1. Zhang, Zhiping & Ai, Fuke & Zhang, Haorui & Zhang, Huan & Zhu, Shengnan & Zhang, Quanguo & Li, Yameng, 2023. "Synergetic effect evaluation of light and mass transfer enhancement strategies on photo fermentative biohydrogen production process: Illumination, shake, and high solid level," Energy, Elsevier, vol. 269(C).
    2. Moreira, F.S. & Rodrigues, M.S. & Sousa, L.M. & Batista, F.R.X. & Ferreira, J.S. & Cardoso, V.L., 2022. "Single-stage repeated batch cycles using co-culture of Enterobacter cloacae and purple non-sulfur bacteria for hydrogen production," Energy, Elsevier, vol. 239(PE).
    3. Jeder, Khawla & Bouhamed, Ayda & Nouri, Hanen & Abdelmoula, Najmeddine & Jöhrmann, Nathanael & Wunderle, Bernhard & Khemakhem, Hamadi & Kanoun, Olfa, 2022. "Enhancement of the performance of flexible lead-free nanogenerators by doping in BaTiO3 nanoparticles," Energy, Elsevier, vol. 261(PB).
    4. Machado, R.G. & Moreira, F.S. & Batista, F.R.X. & Ferreira, J.S. & Cardoso, V.L., 2018. "Repeated batch cycles as an alternative for hydrogen production by co-culture photofermentation," Energy, Elsevier, vol. 153(C), pages 861-869.
    5. Liu, Yang & Xie, Xiaoqing & Wang, Mei, 2023. "Energy structure and carbon emission: Analysis against the background of the current energy crisis in the EU," Energy, Elsevier, vol. 280(C).
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