Abstract

Nowadays, increasing energy demand and environmental and air pollution issues have spread the use of alternative fuels such as biodiesel in diesel engines. While the advantages of biodiesel that are comparable to petroleum-based diesel fuels and low unburned HC, carbon monoxide and smoke (soot) emissions make the use of this fuel environmentally significant; high NO_x emissions are still a problem to be solved. The formation of decreased smoke reducing radiative heat transfer from combustion chamber in biodiesel engines and increase in formation of NO_x due to rise in flame temperature are among the reasons reported for high NO_x in the literature. In this study, in a diesel engine using biodiesel, soot emissions produced by petroleum diesel fuel were reduced to biodiesel level by using metallic additive (Ba), and NO_x emissions were compared. When the amount of Ba in the fuel was increased, there was a significant decrease in the smoke emissions, but in this case, NO_x emissions decreased slightly, while they were expected to increase. When NO_x emissions of diesel and biodiesel were compared for the same or similar smoke emissions, it was seen that high NO_x emissions were achieved with biodiesel. As a result, although Ba additive reduced smoke emissions, it was seen that its effect on NO_x formation was not very clear.

Graphic abstract

中文翻译：

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研究钡基添加剂对以常规柴油和生物柴油为燃料的柴油发动机的烟尘和NOx排放的影响

摘要

如今，不断增长的能源需求以及环境和空气污染问题已使柴油发动机中替代燃料（如生物柴油）的使用范围扩大。尽管生物柴油的优势可与石油基柴油燃料媲美，且未燃烧的HC含量低，但一氧化碳和烟（烟灰）的排放使这种燃料的使用在环境上意义重大；高NO _X排放量仍有待解决的问题。烟降低减少来自燃烧室中的生物柴油发动机和在形成NO的增加辐射热传递的形成_X由于在火焰温度上升是原因之一报告了高的NO _X在文学中。在这项研究中，在使用生物柴油的柴油发动机，由石油柴油燃料产生的烟灰的排放量通过使用金属添加剂（Ba）的降低生物柴油的水平，和NO _X的排放量进行了比较。当燃料中的Ba量增加时，烟雾排放量显着减少，但是在这种情况下，NO _x排放量略有减少，但预计会增加。当NO _X柴油和生物柴油的排放对于相同或相似的烟排放量进行比较，可以看出的是高的NO _X排放量的生物柴油得以实现。结果，尽管Ba添加剂减少了烟气排放，但是可以看出其对NO _x形成的影响不是很清楚。

图形摘要