【摘要】 利用气相色谱仪对米糠油生物柴油(rice bran biodiesel,RBD)的组成进行了研究,测定了RBD的各项特性,结果显示其各项指标均符合国际相关生物柴油标准。在发动机台架上分别燃用0#柴油、RBD和RBD-乙醇混合燃料,利用扫描电镜和X衍射能谱仪研究了3种不同燃料对柴油机颗粒物排放的影响。研究结果表明:在发动机不作任何调整的情况下,燃用RBD和混合燃料可以有效地降低柴油机的碳烟排放,混合燃料的有效燃油消耗率上升最高;燃用0#柴油生成的颗粒物形貌呈疏松状球形粘结形态,RBD颗粒物粒径较小,排列比较细密;燃用混合燃料生成的颗粒物样品呈片状无定型结构;燃用RBD和混合燃料生成的颗粒物样品中金属元素和氧元素含量较高。更多还原

【Abstract】 The main components of the rice bran biodiesel(RBD) fuel were detected by using gas chroma tography-mass spectrometry and the RBD fuel characteristics were determined.The results show that the properties of RBD fuel are similar to that specified by international biodiesel fuel standards.The engine test was carried out by using 0# diesel fuel,RBD fuel and RBD-ethanol blend fuel,and the physiochemical characteristics of the particulate matter(PM) of the diesel engine were analyzed by scanning electronic microscope and X-ray energy spectrometer.The results show that the soot emissions obviously reduce when the engine is fueled with RBD and the blend fuel,and the brake specific fuel consumption is the highest when the engine is fueled with the blend fuel.The PM appears as a loose and conglomerated status when the engine is fueled with 0# diesel fuel,the PM size is smaller and PM arrangement is more compact when the engine is fueled with RBD fuel,the PM sample appears as a chip and noncrystalline solid status when the engine is fueled with the blend fuel,and the content of metal and oxygen element in PM sample is higher when the engine is fueld with RBD fuel.更多还原