Thawornprasert Jarernporn, Somnuk Krit, Oo Ye Min, Prateepchaikul Gumpon
Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
ACS Omega. 2020 Aug 7;5(32):20021-20033. doi: 10.1021/acsomega.0c01475. eCollection 2020 Aug 18.
This research focuses on the feasibility of using diesel-palm fatty acid distillate ethyl ester (PFADE)-ethanol in a direct injection diesel engine without any major modifications. Hydrous ethanol was selected for blending in diesel to produce diesohol. The palm fatty acid distillate (PFAD) and PFADE were directly blended in ethanol and diesel. A comparative study of the phase stability in diesel-PFAD-hydrous ethanol and diesel-PFADE-hydrous ethanol was performed with varied blend proportions. The fuel properties, emissions (CO, CO, NO , O, exhaust gas temperature), and fuel consumptions of diesel, PFADE, diesel-PFADE-hydrous ethanol were compared to evaluate the feasibilities of these fuel blends in a diesel engine at the engine speeds 1100, 1400, 1700, 2000, and 2300 rpm. At 2300 rpm, the maximum CO emission with 10 wt % hydrous ethanol in the blend was approximately 2%. With regard to fuel consumption, clearly, 20 wt % diesohol gave higher consumption than 10 wt % ethanol at a maximum engine speed of 2300 rpm. The blend D50PE40E10 gave the lowest fuel consumption, while the maximum fuel consumption was with the D10PE70E20 blend. Therefore, both 10 and 20 wt % hydrous ethanol in the diesel fuel are alternatives usable in a diesel engine without modifications.
本研究聚焦于在无需任何重大改装的直喷式柴油发动机中使用柴油 - 棕榈脂肪酸蒸馏物乙酯（PFADE） - 乙醇的可行性。选择含水乙醇与柴油混合以生产柴油醇。将棕榈脂肪酸蒸馏物（PFAD）和PFADE直接与乙醇和柴油混合。对柴油 - PFAD - 含水乙醇和柴油 - PFADE - 含水乙醇在不同混合比例下的相稳定性进行了对比研究。比较了柴油、PFADE、柴油 - PFADE - 含水乙醇的燃料特性、排放物（CO、CO、NO 、O、废气温度）以及燃料消耗，以评估这些燃料混合物在发动机转速为1100、1400、1700、2000和2300转/分钟时在柴油发动机中的可行性。在2300转/分钟时，混合物中含10重量%含水乙醇时的最大CO排放量约为2%。关于燃料消耗，显然，在最大发动机转速2300转/分钟时，20重量%的柴油醇比10重量%的乙醇消耗更高。混合比例为D50PE40E10时燃料消耗最低，而混合比例为D10PE70E20时燃料消耗最高。因此，柴油燃料中10重量%和20重量%的含水乙醇都是无需改装即可在柴油发动机中使用的替代品。
