Abstract Neat biodiesels are not preferred for use in the compression ignition (CI) engines due to their high viscosities and related operational difficulties. This study investigated the fuel properties and combustion characteristics when 2-butoxyethanol additive was mixed separately with waste cooking oil biodiesel (W100) and rapeseed oil biodiesel (R100). Compared to neat biodiesels, the viscosities (at 40 °C) of the W100 and R100 were reduced by 12.5% and 9.8% respectively, when they were blended separately with 15% 2-butoxyethanol. Four different samples such as W100, mixture of 85% W100 and 15% 2-Butoxyethanol (W85), R100, mixture of 85% R100 and 15% 2-Butoxyethanol (R85) were tested in a multi-cylinder CI engine. The thermal efficiency of the W85 fuel was higher than fossil diesel by approximately 3.7%. Total combustion duration of the biodiesel-additive blends were shorter than neat biodiesels and fossil diesel. Biodiesel-additive blends provided approximately 6% higher in-cylinder peak pressures. At full load, W85 fuel gave up to 5.4% reduced NOx emissions than neat biodiesel. The CO, HC and smoke emissions were decreased by up to 36%, 100% and 79% respectively. The study concluded that 2-butoxyethanol could effectively be used as biodiesel additive to improve fuel property; and to achieve better combustion and reduced pollution.

中文翻译：

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2-丁氧基乙醇作为生物柴油添加剂对两种纯生物柴油燃料特性和燃烧特性的研究

摘要 纯生物柴油由于其高粘度和相关的操作困难而不适合用于压缩点火 (CI) 发动机。本研究调查了 2-丁氧基乙醇添加剂分别与废弃食用油生物柴油 (W100) 和菜籽油生物柴油 (R100) 混合时的燃料特性和燃烧特性。与纯生物柴油相比，当 W100 和 R100 分别与 15% 的 2-丁氧基乙醇混合时，它们的粘度（在 40 °C 下）分别降低了 12.5% 和 9.8%。在多缸 CI 发动机中测试了四种不同的样品，例如 W100、85% W100 和 15% 2-丁氧基乙醇 (W85) 的混合物、R100、85% R100 和 15% 2-丁氧基乙醇 (R85) 的混合物。W85 燃料的热效率比化石柴油高约 3.7%。生物柴油-添加剂混合物的总燃烧时间比纯生物柴油和化石柴油短。生物柴油添加剂混合物提供的缸内峰值压力高出约 6%。在满负荷时，W85 燃料比纯生物柴油减少了 5.4% 的氮氧化物排放。CO、HC 和烟雾排放量分别减少了 36%、100% 和 79%。研究得出结论，2-丁氧基乙醇可有效用作生物柴油添加剂以改善燃料性能；并实现更好的燃烧和减少污染。分别为 100% 和 79%。研究得出结论，2-丁氧基乙醇可有效用作生物柴油添加剂以改善燃料性能；并实现更好的燃烧和减少污染。分别为 100% 和 79%。研究得出结论，2-丁氧基乙醇可有效用作生物柴油添加剂以改善燃料性能；并实现更好的燃烧和减少污染。