A novel biodiesel named rapeseed oil monoester of ethylene glycol monomethyl ether is developed. This fuel has one more ester group than the traditional biodiesel. The fuel was synthesized and structurally identified through FT-IR and P1PH NMR analyses. Engine test results show that when a tested diesel engine is fueled with this biodiesel in place of 0# diesel fuel, engine-out smoke emissions can be decreased by 25.0%–75.0%, CO emissions can be reduced by 50.0%, and unburned HC emissions are lessened significantly. However, NOx emissions generally do not change noticeably. In the area of combustion performance, both engine in-cylinder pressure and its changing rate with crankshaft angle are increased to some extent. Rapeseed oil monoester of ethylene glycol monomethyl ether has a much higher cetane number and shorter ignition delay, leading to autoignition 1.1°CA earlier than diesel fuel during engine operation. Because of certain amount of oxygen contained in the new biodiesel, the engine thermal efficiency is improved 13.5%–20.4% when fueled with the biodiesel compared with diesel fuel.
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机译：开发了一种新型生物柴油，称为乙二醇单甲醚菜籽油单酯。这种燃料比传统生物柴油具有更多的酯基。通过FT-IR和P 1P H NMR分析合成了该燃料，并在结构上进行了鉴定。发动机测试结果表明，当使用这种生物柴油代替0＃柴油作为被测试的柴油发动机的燃料时，发动机排出的烟尘排放量可减少25.0％–75.0％，CO排放量可减少50.0％，并且未燃烧的HC排放量大大减少。但是，NOx排放通常不会发生明显变化。在燃烧性能方面，发动机缸内压力及其随曲轴转角的变化率都有一定程度的增加。乙二醇单甲醚的菜籽油单酯的十六烷值更高，点火延迟更短，从而在发动机运行期间比柴油燃料提前自燃1.1°CA。由于新生物柴油中含有一定量的氧气，与柴油相比，使用生物柴油进行燃料时，发动机的热效率提高了13.5％–20.4％。
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