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<p>The demand for alternative fuel is progressively increasing in various energy concerns due to pollution-free, improved energy, and better performance. The present innovation is to synthesize the hydrogen from the source of microalgae by using waste grey water. The varied percentages of iron oxide (Fe<sub>2</sub>O<sub>3</sub>) nanoparticles are integrated with grey water to enhance the specific growth of algae. The impact of Fe<sub>2</sub>O<sub>3</sub> on the specific growth of microalgae is investigated. The highest growth of 0.98&#xa0;μm/day is noted at 0.15% of Fe<sub>2</sub>O<sub>3</sub>, which is involved in further hydrogen production via the hydrothermal gasification process under different loading rates (0.05, 0.1, and 0.15&#xa0;g/mL), varied gasification temperatures (500, 550, and 600&#xa0;°C), and different concentrations (5, 10, and 15%) of potassium hydroxide (KOH) featured catalyst. The 0.2% concentration of Fe<sub>2</sub>O<sub>3</sub> is recorded by the maximum specific growth of microalgae (0.98 µ/day). The effect of process parameters on functional behaviour, including molar fraction, hydrogen yield, gasification efficiency (GE), and hydrogen efficiency (HE), is evaluated. The system functioned at a 0.15&#xa0;g/mL feedstock concentration with 600&#xa0;°C, processing microalgae with 15% KOH catalyst action, yielding GE, HE, and lower heating values of 62.4%, 66.9%, and 8.4&#xa0;MJ/Nm<sup>3</sup>. The higher processing temperature influences a superior hydrogen yield of 41.4&#xa0;mol/kg.</p>

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Biomass from grey wastewater featuring iron oxide for hydrogen production via hydrothermal gasification with potassium hydroxide catalyst: investigation study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月12日

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  • K. Karthik,
  • Toshit Jain,
  • Vemuri Sailaja,
  • Aashim Dhawan,
  • A Saravanan,
  • Deepak Minhas,
  • K. Shree Jayaram,
  • Ramya Maranan,
  • T. Thirugnanasambandham,
  • Rajkumar Sivanraju

摘要

The demand for alternative fuel is progressively increasing in various energy concerns due to pollution-free, improved energy, and better performance. The present innovation is to synthesize the hydrogen from the source of microalgae by using waste grey water. The varied percentages of iron oxide (Fe2O3) nanoparticles are integrated with grey water to enhance the specific growth of algae. The impact of Fe2O3 on the specific growth of microalgae is investigated. The highest growth of 0.98 μm/day is noted at 0.15% of Fe2O3, which is involved in further hydrogen production via the hydrothermal gasification process under different loading rates (0.05, 0.1, and 0.15 g/mL), varied gasification temperatures (500, 550, and 600 °C), and different concentrations (5, 10, and 15%) of potassium hydroxide (KOH) featured catalyst. The 0.2% concentration of Fe2O3 is recorded by the maximum specific growth of microalgae (0.98 µ/day). The effect of process parameters on functional behaviour, including molar fraction, hydrogen yield, gasification efficiency (GE), and hydrogen efficiency (HE), is evaluated. The system functioned at a 0.15 g/mL feedstock concentration with 600 °C, processing microalgae with 15% KOH catalyst action, yielding GE, HE, and lower heating values of 62.4%, 66.9%, and 8.4 MJ/Nm3. The higher processing temperature influences a superior hydrogen yield of 41.4 mol/kg.