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http://repositoriodigital.ipn.mx/handle/123456789/10690| Título : | THERMOGRAVIMETRIC DETERMINATION OF COKE FROM ASPHALTENES, RESINS AND SEDIMENTS AND COKING KINETICS OF HEAVY CRUDE ASPHALTENES |
| Palabras clave : | Thermogravimetric analysis Coke formation Asphaltenes Sediments |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Catalysis Today |
| Descripción : | Thermal analysis of asphaltenes and resins from heavy crude was carried out to understand the way in
which they decompose to form coke. Sediments extracted from hydrotreated crude were also analyzed.
It was found that asphaltenes produced 47 wt.% of coke, resins 9 wt.% of coke, and sediments decompose
quickly toward coke giving the highest yield (66 wt.%). In the case of asphaltenes and resins a free
radicals based mechanism is operating when labile points in alkyl chains are broken leading to
condensation reactions. Thermal analysis of sediments obtained from hydrotreated crude revealed that
they have high tendency to form coke. A non-isothermal technique using various heating rates was
applied to study kinetics of asphaltene cracking toward coke formation. An iso-conversional method
based on Friedman’s procedure was used to calculate the reaction kinetic parameters from
thermogravimetric analysis during asphaltene cracking and a set of activation energies and preexponential
factor was obtained as the reaction progresses. Activation energy ranged from 29.2 to 52.4 kcal/mol. http://www.sciencedirect.com/science/article/pii/S0920586109004805 |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/10690 |
| Otros identificadores : | 0920-5861 http://hdl.handle.net/123456789/172 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| art 5.pdf | 54.87 kB | Adobe PDF | Visualizar/Abrir |
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