Identification of alkyl carbazoles and alkyl benzocarbazoles in Brazilian petroleum derivatives

详细信息	查看全文 | 推荐本文 |

• 作者：Eniz Conceiç ; ã ; o Oliveira ; Maria Cecí ; lia Vaz de Campos ; Maria Regina Alves Rodrigues ; Valé ; ria Flores Pé ; rez ; Maria Inê ; s Soares Melecchi ; Maria Goreti Rodrigues Vale ; Clá
• 关键词：Petroleum ; Nitrogen compounds ; Alkyl carbazoles ; GC/MS
• 刊名：Journal of Chromatography A
• 出版年：2006
• 期刊代码：47_00219673
• 类别：ch
• 出版时间：10 February 2006
• 卷：1105
• 期：1-2
• 页码：186-190
• 文件大小：129 K

摘要

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/Chromossorb 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.