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Rodriguez, RAutor o CoautorEspada, JjAutor o CoautorCoto, BAutor (correspondencia)

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Structural Characterization of Fuels Obtained by Olefin Oligomerization

Publicado en:Energy & Fuels. 24 (1): 464-468 - 2010-01-01 24(1), DOI: 10.1021/ef900802y

Autores: Rodriguez, Rosalia; Espada, Juan J; Coto, Baudilio

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Resumen

Environmental legislation concerning the aromatic and sulfur content of gasoline and diesel fuels is becoming more and more restrictive. For that reason, the study of processes obtaining diesel with a low content Of Sulfur is of great interest. Among them, the acid catalyzed oligomerization of light olefins appears as a promising way for diesel manufacture. In this work, products obtained by oligomerization of feedstocks with different amounts of sulfur and nitrogen compounds and a FCC naphta were analyzed and compared with a reference diesel fuel. Distillation curves (SDA) were determined and showed similar boiling point ranges. Molecular Weights, measured from gel permeation chromatography (GPC), showed average Values around C-11. The n-paraffin content was very low as it was qualitative determined by differential scanning calorimetry (DSC) and by gas chromatography-mass spectrometry (GC-MS). Moreover. GC-MS results confirm the average molecular weight (around C-11) determined by GPC analysis. The cetane indexes Were calculated from the CH2/CH3 ratio obtained by H-1 nuclear magnetic resonance spectroscopy (H-1 NMR) analyses, and values for the oligomerization Products Were Slightly lower than that for the reference diesel. According to the characterization results, some of the Studied products Could be used as diesel fuel. Furthermore these products present a good behavior at low temperatures since their n-paraffin content is negligible.

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