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<p>The present research work was focused on the biodiesel production from marine macroalgae <i>Ulva intestinalis</i> biooil using the synthesized catalyst from the de-oiled macroalgal biomass. The process optimization studies resulted in highest biodiesel yield of 93.1% with 12:1 methanol to oil molar ratio, 5.5% (w/w) catalyst concentration, 65&#xa0;°C process temperature and 92&#xa0;min process time. The kinetic and thermodynamic study highlighted a ΔH° value of 6.85 KJ/mol, signifying a moderately endothermic reaction. The economic analysis revealed an internal rate of return of 16.48% and a payback period of 6.12 years. The estimated total CO₂ emission was found to be 0.18&#xa0;kg per kg of biodiesel produced. The findings provided insights for scaling the industrial biodiesel production processes while also achieving the overall economic feasibility and lowering the environmental impacts. This research creates the path for meeting the India’s bioenergy needs, limiting the carbon emissions and contributing to sustainability goals.</p>

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Valorization of Residual Macroalgal Biomass as Efficient Recyclable Biochar Catalyst for Biodiesel Production: Process Feasibility and Sustainability Assessment for Industrial Application

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Ravichandran Pravin,
  • Gurunathan Baskar,
  • Baskaran Sangeetha,
  • Navnit Kumar Ramamoorthy

摘要

The present research work was focused on the biodiesel production from marine macroalgae Ulva intestinalis biooil using the synthesized catalyst from the de-oiled macroalgal biomass. The process optimization studies resulted in highest biodiesel yield of 93.1% with 12:1 methanol to oil molar ratio, 5.5% (w/w) catalyst concentration, 65 °C process temperature and 92 min process time. The kinetic and thermodynamic study highlighted a ΔH° value of 6.85 KJ/mol, signifying a moderately endothermic reaction. The economic analysis revealed an internal rate of return of 16.48% and a payback period of 6.12 years. The estimated total CO₂ emission was found to be 0.18 kg per kg of biodiesel produced. The findings provided insights for scaling the industrial biodiesel production processes while also achieving the overall economic feasibility and lowering the environmental impacts. This research creates the path for meeting the India’s bioenergy needs, limiting the carbon emissions and contributing to sustainability goals.