One of the most important features of the biodiesel fuels to be used in diesel engines is decreasing engine emissions. In the present research, the emissions of an OM 924 Diesel Engine were modeled based on the response surface methodology under the effects of alga biodiesel as well as engine load and rotational speed to find the minimum of those amounts. The obtained quadratic models to predict the effect of input variables on the response surface were statistically significant at 1 % probability level. The amount of CO and HC emissions decreased by increasing the biodiesel percentage compared to that of pure diesel fuel. Biodiesel percentage of 65.6 and 62.6 % were the best blends in terms of minimizing CO and HC emissions, respectively. By increasing the percentage of biodiesel in the blended fuels, CO₂ and NO_X emissions increased and the lowest amounts of those were observed for pure diesel fuel and B6, respectively. Also, an increase in biodiesel percentage in the blended fuels caused to decrease in smoke opacity and high biodiesel percentages were the best in terms of minimizing smoke opacity. The results of multi-objective optimization showed that the lowest CO, CO₂, HC, NO_X, and smoke opacity emissions happened for 66.6 % biodiesel at the engine load and rotational speed of 36.9 % and 1527 RPM, respectively.

用于柴油发动机的生物柴油燃料最重要的特性之一是减少发动机排放。在本研究中，OM 924 柴油发动机的排放基于藻类生物柴油以及发动机负载和转速的影响下的响应面方法进行建模，以找到这些量的最小值。所获得的用于预测输入变量对响应曲面影响的二次模型在 1% 的概率水平上具有统计显着性。与纯柴油燃料相比，通过增加生物柴油的百分比，CO 和 HC 的排放量减少。65.6% 和 62.6% 的生物柴油百分比分别是减少 CO 和 HC 排放的最佳混合物。通过增加混合燃料中生物柴油的百分比，CO ₂和 NO _X排放量增加，而纯柴油燃料和 B6 的排放量分别最低。此外，混合燃料中生物柴油百分比的增加导致烟雾不透明度降低，而高生物柴油百分比在最大限度地减少烟雾不透明度方面是最好的。多目标优化结果表明，在发动机负荷和转速分别为 36.9% 和 1527 RPM 时，66.6% 的生物柴油的CO、CO ₂、HC、NO _X和烟雾不透明度排放最低。