摘要
采用中性硅胶柱分离、富集催化裂化柴油中的含氮化合物,进一步用酸改性硅胶柱将含氮化合物分离成碱性含氮化合物和中性含氮化合物,利用GC-MS进行定性分析,结合含氮化合物的GC保留特性和沸点分布规律,确定催化裂化柴油中含氮化合物的类型,利用GC-NCD进行定量分析。结果表明:催化裂化柴油中的含氮化合物主要是中性含氮化合物和少量碱性含氮化合物;中性含氮化合物占90%以上,主要是吲哚类和咔唑类含氮化合物,不同来源催化裂化柴油中中性含氮化合物的类型分布并不相同;碱性含氮化合物仅占10%左右,主要是苯胺类、喹啉类和苯并喹啉类含氮化合物。
The basic and non-basic N compounds in FCC diesel fraction were directly separated by acid-modified silica column and then quantified by gas chromatography-nitrogen chemiluminescence de- tection （GC-NCD） based on the established database obtained by following steps： firstly nitrogen com- pounds were extracted by neutral silica adsorption column, then the nitrogen compounds were concen- trated and separated into basic and non-basic types using acid-modified silica column, and these two kinds of N compounds were finally analyzed by gas chromatography-mass spectrometer （GC-MS） to i- dentify N compounds. Four kinds of FCC diesels were tested. The results showed that the neutral nitro- gen compounds including indole and carbazole in FCC diesels fraction occupied more than 90% （mass fraction） of the total nitrogen compounds. FCC diesel fraction from different sources have different types and distributions of the neutral nitrogen compound. Basic nitrogen compounds, mainly including aniline, quinoline and benzoquinoline, occupied about 10%（mass fraction）.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2013年第5期87-91,共5页
Petroleum Processing and Petrochemicals
基金
中国石油化工股份有限公司资助项目(12137)
