Abstract
A series of metal oxides (CuO, ZnO, CeO2)-modified zeolite Y nanocomposites were successfully synthesized via procedure comprising (i) ion-exchange (ii) precipitation and (iii) calcination method. Structural analysis of the products confirmed the nanoscale formation of nanocomposites. This study focused on hydrodesulfurization (HDS) of crude oil fraction (isodiesel) in a single reactor loaded with nanocomposites of metal oxide with high specific area and high reactivity under various operating factors such as temperature (350–390 °C), pressure (1–4 MPa), catalyst dosage (0.7–1.3 g) and weight hour space velocity (1–2 h−1) to achieve high quality of diesel. Nanocomposites could efficiently reduce sulfur compound concentration from 2000 ppm to less than 10 ppm according Euro-5 standard. High levels of sulfur compounds (98%) were removed using ZnO-zeolite Y nanocomposite under determined conditions (1 g catalyst, H2/oil mole ratio = 500, LHSV = 1 h−1, temperature = 370 °C). We could recycle ZnO-zeolite Y, 5 times without a significant decrease in catalyst activity that is useful for industrial application. Furthermore, Power Low model confirms that the HDS reaction is irreversible in fixed-bed reactor.
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