Abstract

The aim of this study is to investigate optimization of biodiesel production process and the effects of biodiesel–diesel fuel blends on engine performance and exhaust emission parameters by using response surface methodology. Transesterification method was used in biodiesel production. The importance of four process parameters namely molar ratio, catalyst amount, reaction temperature, and reaction time on biodiesel conversion rate is determined. For the optimization process Box–Behnken design (BBD) based on RSM was used. An optimum biodiesel yield was 93.124% was obtained at 6.05:1 methanol to oil molar ratio, 0.77 wt% catalyst amount, 62.75 °C reaction temperature and 72.63 min reaction time. Engine operating parameters such as blend ratio of biodiesel fuel and engine speed have been optimized to obtain optimum performance and exhaust emission values. The experiments were designed using central composite design method based on RSM. The results revealed that when the engine was operated with 1943.51 rpm engine speed and fueled with a 9.17% biodiesel ratio as the optimal conditions, responses were determined as 44.8097 kW, 245.946 Nm 5.17481%, 262.235 ppm, and 810.227 ppm for power, torque, smoke opacity, CO, and NO_x, respectively.

摘要

本研究的目的是通过使用响应面方法研究生物柴油生产过程的优化以及生物柴油-柴油燃料混合物对发动机性能和废气排放参数的影响。生物柴油生产采用酯交换法。确定了四个工艺参数，即摩尔比、催化剂用量、反应温度和反应时间对生物柴油转化率的重要性。对于优化过程，使用了基于 RSM 的 Box-Behnken 设计 (BBD)。在甲醇与油的摩尔比为 6.05:1、催化剂用量为 0.77 wt%、反应温度为 62.75 °C 和反应时间为 72.63 min 时，获得最佳生物柴油产率为 93.124%。发动机运行参数（例如生物柴油燃料的混合比和发动机转速）已经过优化，以获得最佳性能和废气排放值。实验采用基于RSM的中心复合设计方法设计。结果表明，当发动机以 1943.51 rpm 的发动机转速运行并以 9.17% 的生物柴油比率作为最佳条件提供燃料时，响应确定为 44.8097 kW、245.946 Nm 5.17481%、262.235 ppm 和 810.235 ppm，功率为 810.227 ppm烟雾不透明度、CO 和 NO_x , 分别。