Role of naphthenic acids in emulsion tightness for a low-total-acid-number (TAN)/High-asphaltenes oil (Record no. 170266)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02212nab a2200181 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2009 xxu |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Pauchard, Vincent |
| 9 (RLIN) | 41741 |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Sjoblom, Johan |
| 9 (RLIN) | 41742 |
| 245 00 - TITULO | |
| Título | Role of naphthenic acids in emulsion tightness for a low-total-acid-number (TAN)/High-asphaltenes oil |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Fecha de publicación, distribución, etc. | mar./abr. 2009 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 2009-08-07 ; 2009-08-07 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 11 p. ; 1269-1279 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Resúmen del autor: The emulsion stabilizing properties of a low-total-acid-number (TAN) crude oil, which had initially been attributed to asphaltenes and calcite precipitation, were re-analyzed with regard to the role of organic acids. Despite high asphaltenes content, this crude oil exhibits features classically observed with acidic oils, such as the increase in emulsion stability upon pressure decrease/pH increase or the poor efficiency of demulsifiers. The potential for a significant role of organic acids was confirmed by the high interfacial activity of indigenous acids, as extracted from the crude oil by means of an ion-exchange resin. This was further addressed analyzing the molecular chemistry of the interfacial layer and its rheology. The interfacial material was found to be composed of a mixture of asphaltenes and organic acids. These acids exhibit a wide range of structures (mono- versus dicarboxylic, fatty versus naphthenic and benzoic) and molecular weights (from 200 to 700 g/mol), contrary to the medium molecular weight fatty monocarboxylic acids that are generally believed to cause "soap emulsions". The interfacial rheology is indicative of a 2D gel, with an assumed glass transition temperature of approximately 40 °C. In conclusion, this study shows that a co-precipitation of asphaltenes and organic acids can promote the build up of a very cohesive interface. The disruption of this interface not only requires the drainage of individual molecules but also a collective yield of the gel. This paper is part one of two: it confronts physical and chemical data, the latter being further detailed in an associated paper. |
| 773 0# - CORRECCIÓN | |
| Título | Energy & fuels |
| Partes relacionadas | 23 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| Fuente de clasificación | Dewey Decimal Classification |
| Biblioteca propietaria | Biblioteca actual | Fecha de adquisición | Inventario | Total de préstamos | Inventario | Fecha de carga | Tipo de item KOHA |
|---|---|---|---|---|---|---|---|
| Biblioteca Alejandro Angel Bulgheroni | Biblioteca Alejandro Angel Bulgheroni | 05/03/2026 | 200045093 | 200045093 | 05/03/2026 | Artículo de Revista |
