Biodiesels produced from various feedstocks have been considered as alternative fuels used in internal combustion engines without major modifications. This research focuses on producing biodiesel from waste cooking oil (WCOSD) by the catalytic cracking method using MgO as the catalyst and comparing the engine operating characteristics of the test engine when using WCOSD and traditional diesel (CD) as test fuels. As a result, the brake power of the test engine fueled WCOSD, and traditional diesel is similar. However, the engine fuel consumption in the case of using WCOSD is slight increases in some operating conditions. Also, the nitrogen oxides emissions of the test engine fueled WCOSD are higher than those of CD at all tested conditions. The trend is opposite for hydrocarbon emission as the HC emission of the engine fueled by WCOSD reduces 26.3% on average. The smoke emission of the test engine in case of using WCOSD is lower 17% on average than that of CD. However, the carbon monoxide emissions are lower at the low and medium loads and higher at the full loads. These results show that the new biodiesel has the same characteristics as those of commercial biodiesel and can be used as fuel for diesel engines.

由各种原料生产的生物柴油已被认为是用于内燃机的替代燃料，无需进行重大改动。这项研究的重点是使用MgO作为催化剂，通过催化裂化法从废食用油（WCOSD）生产生物柴油，并比较使用WCOSD和传统柴油（CD）作为试验燃料时试验发动机的发动机运行特性。结果，测试发动机的制动功率为WCOSD供油，与传统柴油相似。但是，在某些操作条件下，使用WCOSD的情况下发动机燃油消耗会略有增加。同样，在所有测试条件下，以试验发动机为燃料的WCOSD排放的氮氧化物均高于CD排放的氮氧化物。碳氢化合物排放的趋势相反，因为由WCOSD燃料驱动的发动机的HC排放减少了26。平均3％。在使用WCOSD的情况下，测试引擎的烟尘排放平均比CD烟尘排放低17％。但是，一氧化碳的排放在中低负荷时较低，而在全负荷时较高。这些结果表明，新型生物柴油具有与商业生物柴油相同的特性，并且可以用作柴油发动机的燃料。