The high emission level of diesel engines has been an issue of global concern and the sophisticated means of controlling the emissions were not cost-effective. In this work, effects of water addition in a bio-derived fuel to mitigate engine emissions and enhances the brake thermal efficiency have been investigated. Four test samples including IBE10, IBE30, IBE29.5W0.5 and IBE29W1 have been prepared and tested in a diesel engine. The engine combustion characteristics, performance and emissions have been observed. It has been established that the water containing blends improve the BTE, BSFC and further reduces emissions at varying loads. In comparison with IBE30, IBE29W1 (29 vol. % IBE, 1 vol. % water and 90 vol. % diesel) has shown decreasing peak in-cylinder pressure and increases ignition delay and combustion duration by 0.13% – 4.8 %, 0.5% – 12.4 % and 0.26% – 3.8 % respectively. As for the engine performance, BTE has been increased by 2.6 % – 14.1% and BSFC decreased by 0.1% – 15 %, respectively, and the emissions of UHC, smoke, CO and NOx emissions was decreased by 21% – 42.6%, 0% – 21.7%, 5.4% –11%, and 0.64% – 9%, at varying loading conditions respectively.

中文翻译：

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含水异丙醇-正丁醇-乙醇（IBE）作为柴油机用正丁醇的下一代生物燃料

柴油发动机的高排放水平一直是全球关注的问题，控制排放的复杂方法不符合成本效益。在这项工作中，研究了在生物衍生燃料中添加水对减轻发动机排放和提高制动热效率的影响。分别制备了IBE10、IBE30、IBE29.5W0.5和IBE29W1四个测试样品，并在柴油机上进行了测试。已观察到发动机燃烧特性、性能和排放。已经确定，含水混合物提高了 BTE、BSFC 并进一步减少了不同负载下的排放。与 IBE30 相比，IBE29W1（29 vol. % IBE、1 vol. % 水和 90 vol. % 柴油）的峰值缸内压力降低，点火延迟和燃烧持续时间增加 0.13% – 4.8 %, 0.5% – 12. 分别为 4% 和 0.26% – 3.8%。发动机性能方面，BTE提高2.6%～14.1%，BSFC降低0.1%～15%，UHC、烟气、CO、NOx排放降低21%～42.6%，0 % – 21.7%、5.4% –11% 和 0.64% – 9%，分别在不同的负载条件下。