纳米二氧化铈与CIME生物柴油混合对发动机特性的尺寸效应
Size Effect of Nanoceria Blended with CIME Biodiesel on Engine Characteristics.
作者信息
Pandey Vivek, Badruddin Irfan Anjum, Kamangar Sarfaraz, Alemayehu Addisu Bekele
机构信息
Mechanical Engineering Department, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama 1888, Ethiopia.
Mechanical Engineering Department, College of Engineering, King Khalid University, Abha 61413, Saudi Arabia.
出版信息
Nanomaterials (Basel). 2022 Dec 20;13(1):6. doi: 10.3390/nano13010006.
Diesel fuel blends with biodiesels are expected to mitigate the rising price and demand of conventional fuels. Biodiesel fuel blends are also known to reduce engine emissions. Biodiesel is produced from various sources, one of which is methyl ester biodiesel (CIMEBD). Even though it serves to mitigate the energy crisis and has a low overall carbon footprint, CIMEBD has certain negative issues relating to engine performance and emission characteristics. Nanoparticle (NP) addition is known to enhance the engine performance characteristics of next generation biofuels. CeO (cerium oxide or ceria) NPs of varying size are used in this study along with 25:75 biodiesel-diesel (BD) blend and a fixed NP concentration of 90 ppm. Ceria NP-doped fuel is shown to have better engine performance compared to diesel and BD blend for all load conditions. Improvements in brake thermal efficiency (BTE) and brake-specific fuel consumption (BSFC) values equal to +30% and -46%, respectively, are observed from experiments for ceria NP-doped biodiesel, compared to diesel-biodiesel (BD) blend. Ceria NPs in the 20 to 40 nm range have optimum engine performance characteristics. Compared to BD blends, NP-doped biodiesel shows improvements in NOx, CO, CO, UHC, and soot parameters up to -35%, -60%, -35%, -38%, and -40%, respectively. Likewise, the optimum size of ceria NPs is in the range 20-40 nm for better emission characteristics.
柴油与生物柴油的混合燃料有望缓解传统燃料价格上涨和需求增加的问题。生物柴油混合燃料也有助于减少发动机排放。生物柴油可从多种来源生产，其中之一是甲酯生物柴油（CIMEBD）。尽管CIMEBD有助于缓解能源危机且总体碳足迹较低，但它在发动机性能和排放特性方面存在一些负面问题。已知添加纳米颗粒（NP）可改善下一代生物燃料的发动机性能特性。本研究使用了不同尺寸的CeO（氧化铈或二氧化铈）纳米颗粒，以及25:75的生物柴油-柴油（BD）混合燃料，固定纳米颗粒浓度为90 ppm。结果表明，在所有负载条件下，掺杂二氧化铈纳米颗粒的燃料比柴油和BD混合燃料具有更好的发动机性能。与柴油-生物柴油（BD）混合燃料相比，掺杂二氧化铈纳米颗粒的生物柴油的实验结果显示，制动热效率（BTE）提高了30%，制动比油耗（BSFC）降低了46%。20至40纳米范围内的二氧化铈纳米颗粒具有最佳的发动机性能特性。与BD混合燃料相比，掺杂纳米颗粒的生物柴油在氮氧化物、一氧化碳、碳氢化合物和烟尘参数方面分别改善了35%、60%、35%、38%和40%。同样，为了获得更好的排放特性，二氧化铈纳米颗粒的最佳尺寸在20-40纳米范围内。
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