Patil Abhijeet D, Baral Saroj Sundar, Mohanty Dillip Kumar, Rane Nitin M
School of Chemical Engineering, MIT Academy of Engineering (AOE), Pune, Maharashtra412105, India.
Department of Chemical Engineering, BITS Pilani K K Birla, Goa Campus, Goa403726, India.
ACS Omega. 2022 Nov 7;7(45):41651-41666. doi: 10.1021/acsomega.2c05658. eCollection 2022 Nov 15.
Thumba oil with a higher triglyceride content can be a promising feed for synthesizing a fatty acid alkyl ester as an alternative to pure diesel. The current study investigates the emission and performance characteristics of thumba methyl ester (TME) in compression ignition (CI) engines corresponding to variable loads and compression ratios (CRs), respectively. TME was prepared at an optimized pressure of 5 bar by hydrodynamic cavitation. The properties of TME-diesel blends with varied volume percentages of biodiesel, such as 5, 10, 15, 20, and 25, denoted B5, B10, B15, B20, and B25, respectively, were compared to pure TME (100% biodiesel) and pure diesel (100%). The B20 biodiesel blend has been observed as the optimal one based on the lower emission composition and higher brake thermal efficiency. For B20 fuel, injection at 23° before the top dead center (TDC) and a CR of 18 resulted in the lowest brake specific fuel consumption of 0.32 kg/kW h and a maximum brake thermal efficiency of 36.5%. Using titanium dioxide nanoparticles in the pre-stage of TME manufacturing has ultimately reduced the nitrogen oxide, hydrocarbon, and carbon monoxide emissions. At a CR of 18 and advanced injection 23° before TDC for a CI engine, TME derived from thumba oil has the potential to be a viable diesel substitute.
甘油三酯含量较高的桐油可以成为合成脂肪酸烷基酯的理想原料，作为纯柴油的替代品。当前的研究分别考察了在压缩点火（CI）发动机中，对应可变负荷和压缩比（CR）时桐油甲酯（TME）的排放和性能特征。通过水力空化在5巴的优化压力下制备了TME。将含有不同体积百分比生物柴油（分别为5%、10%、15%、20%和25%，标记为B5、B10、B15、B20和B25）的TME-柴油混合燃料的性能，与纯TME（100%生物柴油）和纯柴油（100%）进行了比较。基于较低的排放成分和较高的制动热效率，B20生物柴油混合燃料被认为是最佳的。对于B20燃料，在上止点前23°喷油和18的压缩比导致了最低的制动比油耗0.32千克/千瓦·时和最高的制动热效率36.5%。在TME制造的前期使用二氧化钛纳米颗粒最终降低了氮氧化物、碳氢化合物和一氧化碳的排放。对于一台CI发动机，在18的压缩比和在上止点前23°提前喷油的情况下，由桐油衍生的TME有潜力成为一种可行的柴油替代品。
