Abstract

The study presents a comparative evaluation of waste vegetable oil (WVO) versus transesterified waste vegetable oil (WVBD) in diesel blends for engine performance, emission characteristics, economics, and sustainability as an alternative fuel for a compression ignition engine. The impact of blend fraction and blend type on the fuel properties were determined. Increased WVO or WVBD fraction in the blend resulted in increased density, viscosity, flash points, and reduced calorific value. WVBD blends showed lower fuel consumption and better thermal efficiency performance, whereas other engine performance parameters were comparable to WVO blends. Emission characteristics of all the blends were comparable under all load conditions. Economic analysis showed that WVO blends are more cost-effective than WVBD blends. The sustainability analysis using the life cycle assessment methodology revealed lower environmental impacts were associated with WVO blends as compared to WVBD blends. The study pegs WVO blend as a more sustainable and economical diesel fuel alternative against the predominant and more explored WVBD blend.

Graphic abstract

中文翻译：

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柴油混合物作为压缩点火发动机替代燃料时废植物油与酯交换的废植物油的对比分析

摘要

该研究对柴油混合物中的废植物油（WVO）与酯交换的废植物油（WVBD）进行了比较评估，以评估其作为压缩点火发动机的替代燃料的发动机性能，排放特性，经济性和可持续性。确定了混合比例和混合类型对燃料性能的影响。共混物中WVO或WVBD分数的增加导致密度，粘度，闪点和热值降低。WVBD混合物显示出更低的燃油消耗和更好的热效率性能，而其他发动机性能参数可与WVO混合物相比。在所有负载条件下，所有混合物的排放特性均相当。经济分析表明，WVO混合物比WVBD混合物更具成本效益。使用生命周期评估方法进行的可持续性分析表明，与WVBD混合物相比，WVO混合物对环境的影响较小。这项研究将WVO混合油作为一种更具可持续性和经济性的柴油替代品，与主要的WVBD混合油相比更具探索性。

图形摘要