车用汽油中苯胺类化合物的检测及来源分析

采用气相色谱-氮化学发光检测器(GC-NCD)方法测定了汽油调合组分和成品车用汽油中各种含氮化合物的分布和组成,对比分析了汽油中苯胺类化合物的来源。结果表明,正规车用汽油中的含氮物质均来自催化汽油组分,由原料性质、生产工艺等因素自然形成的,而且总氮含量较低,氮形态分布主要以苯胺、甲基苯胺等为主。与苯胺类物质作为汽油添加剂的加入量比较,提出了其判别检测限值的建议,为控制检测汽油质量提供依据。

Analysis of Sources and Detection of Aniline Compounds in Motor Gasoline

The species and concentrations of the nitrogen compounds in gasoline blending components and motor gasoline were analyzed by gas chromatography-nitrogen chemiluminescence detector (GC-NCD) method,in order to reveal the sources of these compounds.The results show that the nitrogen compounds in gasoline are from FCC gasoline components,naturally formed by nature of raw materials,production processes,and the quantity of total nitrogen compounds is very low.The nitrogen compounds mainly include methyl aniline,aniline,and so on.The limit quantity of total nitrogen compounds in motor gasoline has been proposed through comparing with the aniline addition as a gasoline additive,providing the basis for quality control of motor gasoline.