In this work, palm oil biodiesel (POBD100) with a cyclo-octanol additive was employed in a constant speed diesel engine, and its effects on engine combustion, emission, and performance were studied. The biodiesel produced from palm oil by the conventional transesterification process, sodium hydroxide, and methanol were involved in the conversion of oil into biodiesel. The five fuels evaluated were neat palm oil biodiesel (POBD100), octanol blended with palm oil biodiesel by 10% volume (POBD90O10), octanol blended with palm oil biodiesel by 20% volume (POBD80O20), octanol blended with palm oil biodiesel by 30% volume (POBD70O30), and petroleum diesel. The experimental results revealed that with the increased octanol fraction, the combustion was smooth. All the octanol and biodiesel blends provide earlier combustion when compared to neat palm oil biodiesel which leads to higher thermal efficiency, lower fuel consumption, lower peak pressure, and shorter ignition delay. All the emissions are reduced by the addition of cyclo-octanol in palm oil biodiesel in all loads owing to the higher oxygen concentration of air/fuel mixtures and improved atomization. Based on the outcome of this study, palm oil biodiesel and cyclo-octanol blends can be employed as a potential alternative fuel for existing unmodified diesel engines owing to its improved combustion, emission, and performance characteristics.

中文翻译：

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柴油发动机中纯棕榈油生物柴油和高级酒精混合物的性能，燃烧和排放分析

在这项工作中，将具有环辛醇添加剂的棕榈油生物柴油（POBD100）用于恒速柴油发动机，并研究了其对发动机燃烧，排放和性能的影响。由棕榈油通过常规的酯交换过程生产的生物柴油，氢氧化钠和甲醇参与了将油转化为生物柴油的过程。评估的五种燃料为纯棕榈油生物柴油（POBD100），以10％体积混合辛醇和棕榈油生物柴油（POBD90O10），以20％体积混合辛醇和棕榈油生物柴油（POBD80O20），以辛醇和棕榈油生物柴油混合30％体积（POBD70O30）和石油柴油。实验结果表明，随着辛醇分数的增加，燃烧变得平稳。与纯棕榈油生物柴油相比，所有辛醇和生物柴油混合物都能提供更早的燃烧，从而提高热效率，降低燃料消耗，降低峰值压力和缩短点火延迟。由于空气/燃料混合物中较高的氧气浓度和改善的雾化，在所有负荷下在棕榈油生物柴油中添加环辛醇可减少所有排放。根据这项研究的结果，由于棕榈油生物柴油和环辛醇的混合物改善了燃烧，排放和性能，因此可以用作现有未改性柴油发动机的潜在替代燃料。由于空气/燃料混合物中较高的氧气浓度和改善的雾化，在所有负荷下在棕榈油生物柴油中添加环辛醇可减少所有排放。根据这项研究的结果，由于棕榈油生物柴油和环辛醇的混合物改善了燃烧，排放和性能，因此可以用作现有未改性柴油发动机的潜在替代燃料。由于空气/燃料混合物中较高的氧气浓度和改善的雾化，在所有负荷下通过在棕榈油生物柴油中添加环辛醇可减少所有排放。根据这项研究的结果，由于棕榈油生物柴油和环辛醇的混合物改善了燃烧，排放和性能，因此可以用作现有未改性柴油发动机的潜在替代燃料。