Characterization of Venezuelan vacuum residua and product vacuum residua obtained using the HDM{trademark} technology

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:229623

Izquierdo, A; Espidel, Y; Fraile, R ^[1]

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1. Research and Technological Support Center, Caracas (Venezuela)

Detailed characterization of heavy crudes and vacuum residua, as well as the resulting products of the necessary upgrading process, are of great importance in the use of these energy sources. The physical and chemical properties vary among different feedstocks and they determine different behavior during the upgrading process. This paper describes the characterization of five Venezuelan vacuum residua, 500{degrees}C+, and the vacuum residua of the products obtained when they were processed using the HDH{trademark} technology. The operating conditions were kept constant in order to be able to compare the reactivity of the different feedstocks. Special emphasis is given to the asphaltenes characterization and, in particular, to the results room the Average Molecular Parameters obtained by proton NMR. A correlation between these parameters and the reactivity was found. It was equally found that the asphaltenes of the feeds were very different in aromaticity, number of bridging aromatic carbons, and other properties involving the aromatic portion of these samples, whereas the asphaltenes of the resulting products had strong similarities. This indicates that despite the different nature o the starting material, the transformations during the process bring the high molecular weight aromatic components to similar structures.

• OSTI ID: 229623
• Report Number(s): CONF-9502114--Vol.2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
66 PHYSICS
AROMATICS
ASPHALTENES
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
HYDROGEN 1
MOLECULAR WEIGHT
NMR SPECTRA
PETROLEUM RESIDUES
STRUCTURAL CHEMICAL ANALYSIS
X-RAY FLUORESCENCE ANALYSIS