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<p>The increasing global demand for sustainable and renewable energy has intensified the optimization of biodiesel production as a viable alternative to fossil fuels. Achieving high-quality biodiesel is critical, particularly in terms of removing residual contaminants that can compromise engine performance and environmental benefits. This study provides a comprehensive evaluation of both conventional and emerging biodiesel purification techniques, including ultrasonic-assisted crystallization, electrostatic field treatment, membrane filtration, and micro-extractors. Each method is assessed based on its efficiency in removing common impurities such as glycerol, unreacted glycerides, residual catalysts, and free fatty acids. Global biodiesel production reached approximately 46&#xa0;billion liters in 2023, yet refining remains a major bottleneck, contributing up to 30% of total production costs. Consequently, improving purification methods is essential for enhancing process efficiency and reducing environmental impact. This work critically analyzes each technique with respect to operational cost, energy consumption, waste generation, and overall sustainability. Innovative approaches such as membrane separation and electrostatic purification show promising results, with impurity removal efficiencies exceeding 95% under optimized conditions. The objective of this study is to determine the most effective and economically viable purification technologies suitable for large-scale biodiesel production. Findings from this work aim to support both academic research and industrial application, guiding future developments toward more efficient biodiesel supply chains. Ultimately, advancing biodiesel purification is a key step toward reducing reliance on fossil fuels and promoting global energy sustainability.</p>

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A comprehensive analysis of refining technologies for biodiesel purification

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Monika,
  • Vinayak V. Pathak,
  • Sangita Banga

摘要

The increasing global demand for sustainable and renewable energy has intensified the optimization of biodiesel production as a viable alternative to fossil fuels. Achieving high-quality biodiesel is critical, particularly in terms of removing residual contaminants that can compromise engine performance and environmental benefits. This study provides a comprehensive evaluation of both conventional and emerging biodiesel purification techniques, including ultrasonic-assisted crystallization, electrostatic field treatment, membrane filtration, and micro-extractors. Each method is assessed based on its efficiency in removing common impurities such as glycerol, unreacted glycerides, residual catalysts, and free fatty acids. Global biodiesel production reached approximately 46 billion liters in 2023, yet refining remains a major bottleneck, contributing up to 30% of total production costs. Consequently, improving purification methods is essential for enhancing process efficiency and reducing environmental impact. This work critically analyzes each technique with respect to operational cost, energy consumption, waste generation, and overall sustainability. Innovative approaches such as membrane separation and electrostatic purification show promising results, with impurity removal efficiencies exceeding 95% under optimized conditions. The objective of this study is to determine the most effective and economically viable purification technologies suitable for large-scale biodiesel production. Findings from this work aim to support both academic research and industrial application, guiding future developments toward more efficient biodiesel supply chains. Ultimately, advancing biodiesel purification is a key step toward reducing reliance on fossil fuels and promoting global energy sustainability.