The utilization of biodiesel‐diesel blends in compression ignition (CI) engines are a viable option for the current energy crises. But due to better combustion features of biodiesel‐diesel blends leading to high NO_x release from engine exhaust hinders the use of such blends. Usually all of the harmful exhaust emissions like HC and CO reduces marginally, except nitrogen oxides at higher compression ratios with biodiesel blended fuel. The present paper focuses on the study of variation of compression ratio and use of NiO nanoparticles in neem biodiesel‐diesel mixture (NB25) at different braking loads. A total of four test fuels of NB25 blend were prepared having nickel oxides at different concentration levels of 25, 50, 75, and 100 ppm. The current findings reveal that the use of 75 ppm of NiO in NB25 blend reduces the amount of thermal NO_x by 6.2% compared to the absence of nanoparticles. Also, the performance parameters such as brake thermal efficiency improved by 2.9% and brake specific fuel consumption reduced by 1.8%. The presence of 75 ppm of NiO in NB25 not only shows best performance and also lower harmful emission.

中文翻译：

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通过改变压缩比，印za生物柴油-柴油共混物中氧化镍纳米添加剂对发动机性能和排放特性的影响

在当前的能源危机中，在压缩点火（CI）发动机中使用生物柴油-柴油混合物是一种可行的选择。但生物柴油的柴油混合导致高NO由于更好的燃烧特性_X从发动机排气中释放出来会阻碍这种混合物的使用。通常，除生物柴油混合燃料在较高压缩比下的氮氧化物外，所有有害排放物（如HC和CO）都会略有减少。本文重点研究了在不同制动负载下印ne生物柴油-柴油混合物（NB25）中压缩比的变化和NiO纳米颗粒的使用。制备了总共四种NB25共混物的测试燃料，其中氧化镍的浓度分别为25、50、75和100 ppm。目前的研究结果显示，在NB25共混物中的使用75ppm的氧化镍的减少热NO的量_X与不存在纳米颗粒相比，降低了6.2％。此外，性能参数（如制动器热效率提高了2.9％）和制动器比油耗降低了1.8％。NB25中75 ppm的NiO的存在不仅显示出最佳性能，而且有害排放降低。