Determination of the Onset of Asphaltene Precipitation by Visible Ultraviolet Spectrometry and Spectrofluorimetry

Autor:	Gaspar González, Aline R. S. Guimarães, Claudia R. E. Mansur, Elizabete F. Lucas
Rok vydání:	2009
Předmět:	Heptane Chromatography Biochemistry (medical) Clinical Biochemistry Fluorescence spectrometry Mass spectrometry Biochemistry Toluene Analytical Chemistry law.invention chemistry.chemical_compound chemistry law Electrochemistry Petroleum Sample preparation Distillation Spectroscopy Asphaltene
Zdroj:	Analytical Letters. 42:2648-2664
ISSN:	1532-236X 0003-2719
DOI:	10.1080/00032710903243612
Popis:	Asphaltene deposition is a problem for the petroleum industry, affecting the production, transport, and storage of crude oil. The aim of this work is to develop and compare different methods to determine asphaltene precipitation. Two asphaltene fractions, one extracted from a Brazilian crude oil sample and the other from petroleum distillation residue, were evaluated by using model systems constituted of toluene/n-heptane in different compositions, using visible ultraviolet spectrometry and spectrofluorimetry. The results of the precipitation tests carried out by these two methods agreed, indicating they are effective to analyze asphaltene deposition and the performance of chemicals as asphaltene stabilizers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::52512a8131bd3c607bfa18f42c299f95 https://doi.org/10.1080/00032710903243612 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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