Abstract

The present work aims at investigating the compatibility of antioxidant with biodiesel through the tribological assessment of a compression ignition engine. In this research work, 2,6-di-tert-butylphenol, a novel antioxidant, has been blended with clean Karanja oil methyl ester at the rate of 500 ppm. The compression ignition engine has been operated for 256 h of long-term durability tests in two different phases using clean Karanja biodiesel (KBD100) and 500 ppm antioxidant-blended clean Karanja biodiesel (KBD100@E). The study revealed that the compression ignition engine operated with KBD100@E fuel has exhibited low lubricating oil degradation when compared to clean Karanja biodiesel at same 256 h of operation. The long-term endurance test also showed that the kinematic viscosity, flash point and total base number of lubricating oil collected from KBD100@E-fueled engine were observed to lower than KPD100-fueled engine. Similarly, the wear metal concentrations were higher in lubricating oil of KPD100-fueled engine than that of antioxidant-added KBD fuel and diesel fuels. Furthermore, the surface roughness results also showed that the cylinder liner surface of KPD100-fueled engine was more smoothened compared to KBD100@E-fueled engine. The wear of piston rings was also noted to be more severe for KBD100-fueled engine when compared to diesel and KPD100@E-fueled engines. Finally, it has been concluded that the compression ignition engine life can be improved by the addition of antioxidant with biodiesel fuel.

Graphic abstract

中文翻译：

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使用抗氧化剂和清洁的Karanja甲酯重新配制燃料策略对压燃发动机相容性的影响

摘要

本工作旨在通过压缩点火发动机的摩擦学评估来研究抗氧化剂与生物柴油的相容性。在这项研究工作中，将新型抗氧化剂2,6-二叔丁基苯酚与清洁的Karanja油甲基酯以500 ppm的比例混合。使用清洁的Karanja生物柴油（KBD100）和500 ppm抗氧化剂混合的清洁Karanja生物柴油（KBD100 @ E），压缩点火发动机已在两个不同阶段中进行了256小时的长期耐久性测试。研究表明，与在相同的256小时运行的清洁Karanja生物柴油相比，使用KBD100 @ E燃料运行的压缩点火发动机的润滑油降解率低。长期耐力测试还表明，运动粘度，观察到从KBD100 @ E燃料的发动机收集的闪点和润滑油的总基数低于KPD100燃料的发动机。同样，KPD100燃料发动机的润滑油中的磨损金属浓度高于添加抗氧化剂的KBD燃料和柴油燃料中的磨损金属浓度。此外，表面粗糙度结果还表明，与KBD100 @ E燃料发动机相比，KPD100燃料发动机的气缸套表面更加光滑。与柴油发动机和KPD100 @ E发动机相比，KBD100发动机的活塞环磨损也更为严重。最后，得出的结论是，通过在生物柴油燃料中添加抗氧化剂，可以改善压燃式发动机的寿命。与添加抗氧化剂的KBD燃料和柴油相比，KPD100发动机的润滑油中的磨损金属浓度更高。此外，表面粗糙度结果还表明，与KBD100 @ E燃料发动机相比，KPD100燃料发动机的气缸套表面更加光滑。与柴油发动机和KPD100 @ E发动机相比，KBD100发动机的活塞环磨损也更为严重。最后，得出的结论是，通过在生物柴油燃料中添加抗氧化剂，可以改善压燃式发动机的寿命。与添加抗氧化剂的KBD燃料和柴油相比，KPD100发动机的润滑油中的磨损金属浓度更高。此外，表面粗糙度结果还表明，与KBD100 @ E燃料发动机相比，KPD100燃料发动机的气缸套表面更加光滑。与柴油发动机和KPD100 @ E发动机相比，KBD100发动机的活塞环磨损也更为严重。最后，得出的结论是，通过在生物柴油燃料中添加抗氧化剂，可以改善压燃式发动机的寿命。表面粗糙度结果还表明，与KBD100 @ E发动机相比，KPD100发动机的气缸套表面更光滑。与柴油发动机和KPD100 @ E发动机相比，KBD100发动机的活塞环磨损也更为严重。最后，得出的结论是，通过在生物柴油燃料中添加抗氧化剂，可以改善压燃式发动机的寿命。表面粗糙度结果还表明，与KBD100 @ E发动机相比，KPD100发动机的气缸套表面更光滑。与柴油发动机和KPD100 @ E发动机相比，KBD100发动机的活塞环磨损也更为严重。最后，得出的结论是，通过在生物柴油燃料中添加抗氧化剂，可以改善压燃式发动机的寿命。

图形摘要