期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1105, 期 1-2, 页码 186-190出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2005.11.001
关键词
petroleum; nitrogen compounds; alkyl carbazoles; GC/MS
Carbozoles are important compounds in crude oils, as they may be used as geochemical tracers, being the major type of nitrogen compounds in petroleum. At the same time, they are regarded as undesirable due to the problems they may cause in the refining process, such as catalyst poisoning, corrosion, gum or color formation in final products. As separation and identification of carbazoles are challenging goals, this work presents a chromatographic method, made of a pre-fractionation on neutral alumina followed by the separation and identification of two classes of carbazoles using FeCl3/Chomossorb W and gas chromatograph with mass spectrometer (GC/MS) (SIM-single ion monitoring mode) analysis. For the first time, a series of alkyl carbazoles and alkyl benzocarbazoles were identified in heavy gas oil (HGO) and atmospheric residue of distillation (ARD) obtained from Brazilian petroleum. (c) 2005 Elsevier B.V. All rights reserved.
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