Asphaltene nanoaggregates studied by centrifugation (Record no. 170173)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 01731nab a2200181 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2009 xxu |
| 245 00 - TITULO | |
| Título | Asphaltene nanoaggregates studied by centrifugation |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Lugar de publicación, distribución, etc. | |
| Nombre de publicador, distribuidor, etc. | |
| Fecha de publicación, distribución, etc. | mar./abr. 2009 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 2009-07-23 ; 2009-07-23 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 6 p. ; 1194-1200 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Resúmen del autor: The colloidal structure of asphaltenes impacts various physical properties and is important to characterize. Previously, in both laboratory and oilfield studies, asphaltenes have been shown to form nanoaggregates. In addition, previous work has shown that asphaltenes exhibit a critical nanoaggregate concentration (CNAC) in toluene in the range of 50-150 mg/L. In this study, centrifugation is used to prove a major change of asphaltene aggregation at the CNAC concentration, thereby corroborating previous results. Collection of these nanoaggregates by centrifugation validates there existence. The nanoaggregate size is found to be 2.5 nm, which is compatible with corresponding previous determinations from gravitational gradients. Asphaltene monomers are seen to be small (<1.5 nm), confirming previous diffusion measurements and corroborating the now common view that asphaltene molecular size is rather small. A two-component, monomer and nanoaggregate, phase equilibrium model is shown to treat the primary features of the data; nevertheless, shortcomings of this model are discussed. These centrifugation experiments are simple and we believe compelling confirmation of the asphaltene CNAC in toluene. |
| 773 0# - CORRECCIÓN | |
| Título | Energy & fuels |
| Partes relacionadas | 23 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Mostowfi, Farshid |
| 9 (RLIN) | 41541 |
| 650 #0 - MATERIA | |
| Término tópico | Asfaltenos |
| 9 (RLIN) | 20433 |
| 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 | 200045000 | 200045000 | 05/03/2026 | Artículo de Revista |
