Changes in Asphaltenes Properties Modified with Fe in Hydrotreating Reactions |
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| Authors: | J C Pereira M A Luis Luis S P Cubillos |
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| Affiliation: | 1. Lab. Petróleo, Hidrocarburos y Derivados (PHD), Universidad de Carabobo, Facultad Experimental de Ciencias y Tecnología, Departamento de Química , Carabobo , Venezuela;2. Lab. Catálisis y Metales de Transición, Universidad de Carabobo, Facultad Experimental de Ciencias y Tecnología, Departamento de Química , Carabobo , Venezuela;3. Lab. Petróleo, Hidrocarburos y Derivados (PHD), Universidad de Carabobo, Facultad Experimental de Ciencias y Tecnología, Departamento de Química , Carabobo , Venezuela;4. Lab. Catálisis y Metales de Transición, Universidad de Carabobo, Facultad Experimental de Ciencias y Tecnología, Departamento de Química , Carabobo , Venezuela |
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| Abstract: | Abstract The properties of the Hamaca of asphaltenes extra-heavy crude oil (AsfH) of Petroliferous Orinoco Belt can be modified for evaluating the changes produced with hydrotreating (HDT). One characterized the solid modified by means of UV-visible spectroscopy and nuclear magnetic proton resonance (NMR 1H). The samples were put under hydrotreating to 200°C to avoid thermal cracking, atmospheric pressure, and a flow of feeding of 10.5 mL/hr in a fixed-bed reactor in the presence of H2S generated in situ. The reactivity was followed by gas chromatography (GC). All the samples were evaluated before and after being hydrotreated by 1H NMR, total sulfur analysis, and determination of molecular weight average by vapor pressure osmometry (VPO). The obtained results suggest the iron possibly is inserted in the structure of the asphaltene forming a new active phase catalytically, presumably a mixed sulfide (pyrrotite type) of iron-metal of transition (V and Ni) present in the asphaltene. |
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| Keywords: | asphaltene hydrotreating reactivity |
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