Identification of alkyl carbazoles and alkyl benzocarbazoles in Brazilian petroleum derivatives
| Autor: | Maria Ines Soares Melecchi, Valéria Flores Pérez, Cláudia Alcaraz Zini, Maria Cecília Vaz de Campos, Maria Goreti Rodrigues Vale, Elina Bastos Caramão, Maria Regina Alves Rodrigues, Eniz Conceição Oliveira |
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| Rok vydání: | 2006 |
| Předmět: |
Carbazoles
Chemical Fractionation Mass spectrometry Ferric Compounds Biochemistry Catalyst poisoning Gas Chromatography-Mass Spectrometry Analytical Chemistry law.invention chemistry.chemical_compound Chlorides law Aluminum Oxide Organic chemistry Distillation Alkyl chemistry.chemical_classification Chromatography Organic Chemistry General Medicine Fuel oil Petroleum chemistry Gas chromatography Gas chromatography–mass spectrometry |
| Zdroj: | Journal of Chromatography A. 1105:186-190 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2005.11.001 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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