摘要
采用中性硅胶柱分离、富集直馏柴油和焦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定性,结合含氮化合物的GC保留特性和沸点分布规律,确定直馏柴油和焦化柴油中合氮化合物的类型。结果表明,直馏柴油中中性含氮化合物占总含氮化合物的质量分数在70%以上,主要是苯并咔唑类含氮化合物;焦化柴油中含氮化合物包括吡啶类、苯胺类、吲哚类、喹啉类和咔唑类等含氮化合物,其中中性含氮化合物的含量比碱性含氮化合物稍高,占总含氮化合物的质量分数在50%以上。
Nitrogen compounds were extracted from coker gas oil and straight run atesei oll Dy chro- matography with neutral silica adsorption column. Then the nitrogen compounds were concentrated and separated into basic and non-basic types using acid-modified silica column. The identification of nitrogen compounds in the extracts was performed by gas chromatography-mass spectrometer （GC-MS） and gas chromatography-nitrogen chemiluminescence detection （GC-NCD）, as well as verification of peak as- signments with those reported by others. Results showed that in straight-run diesel, neutral nitrogen compounds, mainly benzocarbazole nitrogen compounds, occupied more than 70% （mass fraction） of the total nitrogen compounds; in coker gas oil, nitrogen compounds including pyridine, aniline, indole, quin- oline, and carbazole were found, and the mass fraction of total neutral nitrogen compounds was slightly over that of basic nitrogen compounds occupied more than 50%of the total nitrogen compounds.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2013年第1期41-45,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)
