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<p>Hydrogen energy is becoming increasingly important as a clean and sustainable alternative to fossil fuels. Microalgae have the potential to significantly contribute to the global hydrogen economy by offering a sustainable and environmentally friendly source of biomass for hydrogen production. However, high levels of pollution and nutritional imbalances can hinder their growth, which limits syngas production. This research intends to enhance microalgae growth from textile wastewater with additions of 0–0.4wt% of silicon dioxide (SiO<sub>2</sub>) and higher development of microalgae used as biomass for hydrogen production via supercritical water gasification process (SCWG) under varied gasification temperatures (550–750⁰C), and different residence time (30–60&#xa0;min) and its hydrogen production enhanced by the adaptation of SiO<sub>2</sub> nanoparticle (0.5–1.5%) featured catalyst. With the influences of gasification temperature, residence time, and catalyst with 0.4wt% SiO<sub>2</sub> activated high growth microalgae on molar fraction, syngas yield and its gasification efficiency are investigated. The system configured with 15wt% concentration microalgae operated with 1.5wt% SiO<sub>2</sub> catalyst action at 750⁰C with 60&#xa0;min residence time found increased hydrogen yield (66.7&#xa0;mol/kg), better gasification efficiency (63.4%), and optimum hydrogen efficiency (66.8%), which is better than others. This extracted hydrogen green energy is proposed as an alternative energy source for automotive applications.</p>

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Enhanced hydrogen production from microalgae cultivated in textile wastewater using 1.5%SiO₂ nanoparticle catalysts via supercritical water gasification

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • R. Venkatesh,
  • Aman Sharma,
  • Nagabhooshanam Nagarajan,
  • Mohanavel Vinayagam,
  • K. Karthik,
  • Apurv Verma,
  • Manzoore Elahi M. Soudagar,
  • Sami Al Obaid,
  • Sulaiman Ali Alharbi

摘要

Hydrogen energy is becoming increasingly important as a clean and sustainable alternative to fossil fuels. Microalgae have the potential to significantly contribute to the global hydrogen economy by offering a sustainable and environmentally friendly source of biomass for hydrogen production. However, high levels of pollution and nutritional imbalances can hinder their growth, which limits syngas production. This research intends to enhance microalgae growth from textile wastewater with additions of 0–0.4wt% of silicon dioxide (SiO2) and higher development of microalgae used as biomass for hydrogen production via supercritical water gasification process (SCWG) under varied gasification temperatures (550–750⁰C), and different residence time (30–60 min) and its hydrogen production enhanced by the adaptation of SiO2 nanoparticle (0.5–1.5%) featured catalyst. With the influences of gasification temperature, residence time, and catalyst with 0.4wt% SiO2 activated high growth microalgae on molar fraction, syngas yield and its gasification efficiency are investigated. The system configured with 15wt% concentration microalgae operated with 1.5wt% SiO2 catalyst action at 750⁰C with 60 min residence time found increased hydrogen yield (66.7 mol/kg), better gasification efficiency (63.4%), and optimum hydrogen efficiency (66.8%), which is better than others. This extracted hydrogen green energy is proposed as an alternative energy source for automotive applications.