Hasnain S M Mozammil, Sharma R P
Department of Mechanical Engineering, Birla Institute of Technology Ranchi Jharkhand India
RSC Adv. 2019 Aug 28;9(46):26880-26893. doi: 10.1039/c9ra04342j. eCollection 2019 Aug 23.
Herein, the performance, emission and physiochemical properties of a soy methyl ester (SME) and its combination with methyl oleate (MO) in a common rail direct injection (CRDI) engine were investigated. Moreover, the performance of the engine in terms of brake power (BP), brake thermal efficiency (BTE), brake specific fuel consumption (BSFC) and NO emission was assessed to compute the characteristics of the combination of SME with MO; the reasons for using MO in the blending process were the better ignition quality, oxidative stability and low-temperature flow properties of MO, striking a balance between oxidative stability and low flow properties. A remarkable reduction in the BSFC and an increase in the BTE were found in the blended biodiesel (S80-MO20, S70-M30, and S50-M50) as compared to the case of SME. The blended biodiesel was also characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis) and nuclear magnetic resonance (NMR) spectroscopy. In the FTIR spectra, a peak was observed at 1745 cm, confirming the presence of a triglyceride ester linkage. Since UV-vis spectroscopy is an affordable technique, herein, it has been employed to detect the presence of conjugated dienes in the oxidized biodiesel. The linear line fitted for absorbance the percentage of the blended fuel at 320 nm showed a high coefficient of determination ( = 0.9454). In addition, H NMR spectroscopy was employed to study the oxidative stability of the blended fuel. Different functional groups with their respective peaks (in ppm) are indicated in the NMR spectra.
在此，研究了大豆甲酯（SME）及其与油酸甲酯（MO）的混合物在共轨直喷（CRDI）发动机中的性能、排放和理化性质。此外，评估了发动机在制动功率（BP）、制动热效率（BTE）、制动比油耗（BSFC）和NO排放方面的性能，以计算SME与MO混合物的特性；在混合过程中使用MO的原因是MO具有更好的点火质量、氧化稳定性和低温流动性能，在氧化稳定性和低流动性能之间取得平衡。与SME相比，混合生物柴油（S80-MO20、S70-M30和S50-M50）的BSFC显著降低，BTE增加。还通过傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV-vis）和核磁共振（NMR）光谱对混合生物柴油进行了表征。在FTIR光谱中，在1745 cm处观察到一个峰，证实了甘油三酯酯键的存在。由于UV-vis光谱是一种经济实惠的技术，在此已用于检测氧化生物柴油中共轭二烯的存在。在320 nm处拟合的吸光度与混合燃料百分比的线性曲线显示出高决定系数（=0.9454）。此外，采用1H NMR光谱研究混合燃料的氧化稳定性。NMR光谱中显示了具有各自峰（以ppm为单位）的不同官能团。
