Abstract

Biodiesels are widely recognized as a leading choice among the alternative options to traditional petrodiesel fuel due to their significant technical and economic advantages. The transesterification process was utilized to prepare biodiesel from palm and prosopis juliflora oil, using NaOH as the catalyst and methanol as the alcohol in this particular experiment. Palm and juliflora biodiesel mixture was prepared as PJ0, PJ20, PJ40, PJ60, PJ80 and PJ100 by weight percentage (0, 20, 40, 60, 80, and 100%). Based on the physio-chemical properties, PJ60 (B100) was selected as a superior blend and mixed with pure diesel to create different test fuels with varying biodiesel (B0, B20, B30, B40, and B100) concentrations. The experiment examined a four-stroke, single-cylinder CI engine’s fuel filterability, performance and emission characteristics. The results indicated the filter blocking tendency value of B20 as 1.36, which is in line with ASTM standard (D2068-14), also lower pressure drop and higher soaking strength among other blends. The B20 blend increased brake-specific fuel consumption by 0.27 kg/kW-h at 3.84%, and brake thermal efficiency was 32.64%, closer to neat diesel in full load. Hydrocarbon, carbon monoxide and smoke emissions of B20 blends were decreased by 2.6, 2.5, and 9.42%, respectively. Besides, NOx emission exhibited a significant increase compared to base diesel. The above results aided the conclusion that the B20 mixture holds the potential of alternate fuel for IC engines.

中文翻译：

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双生物柴油与传统柴油混合的 CI 发动机燃油过滤性、性能和排放特性的比较研究

摘要

由于其显着的技术和经济优势，生物柴油被广泛认为是传统石化柴油燃料替代方案中的首选。在这个特定的实验中，使用NaOH作为催化剂和甲醇作为醇，利用酯交换工艺从棕榈油和野牛油中制备生物柴油。棕榈和 juliflora 生物柴油混合物按重量百分比（0、20、40、60、80 和 100%）制备为 PJ0、PJ20、PJ40、PJ60、PJ80 和 PJ100。根据物理化学特性，选择 PJ60 (B100) 作为优质混合物，与纯柴油混合，制成具有不同生物柴油（B0、B20、B30、B40 和 B100）浓度的不同测试燃料。该实验检查了四冲程单缸 CI 发动机的燃油过滤性、性能和排放特性。结果表明，B20的过滤堵塞倾向值为1.36，符合ASTM标准（D2068-14），并且比其他共混物具有更低的压降和更高的浸泡强度。B20 混合物使制动特定油耗增加 0.27 kg/kW-h，达到 3.84%，制动热效率为 32.64%，更接近满负荷时的纯柴油。B20 混合物的碳氢化合物、一氧化碳和烟雾排放量分别减少了 2.6%、2.5% 和 9.42%。此外，与基础柴油相比，NOx 排放量显着增加。上述结果有助于得出这样的结论：B20 混合物具有作为内燃机替代燃料的潜力。