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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

BASSI, R et al. TUNGSTEN AND RHENIUM AS HYDROGENATION AGENTS IN THE HYDRODENITROGENATION OF PYRIDINE USING STACKED BED CATALYST SYSTEMS. J. Chil. Chem. Soc. [online]. 2015, vol.60, n.2, pp.2931-2934. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072015000200015.

This study analyses the hydrodenitrogenation (HDN) of pyridine using a stacked bed catalyst system, composed of a first hydrogenating bed of Re/γ-Al2O3 or W/γ-Al2O3, over a second bed of Ni-Re/γ-Al2O3 (HDN bed). Using potentiometric methods, it can be seen that the Re/γ-Al2O3 shows higher acidic strength than the W/γ-Al2O3. The results show that higher activity levels are obtained working with stacked bed systems compared to the separate catalysts. These results suggest that the incorporation of the catalyst Re/γ-Al2O3 or W/γ-Al2O3 beds would favour the formation of hydrogenated intermediary products, facilitating the removal of N-containing molecules via HDN on the Ni-Re/γ-Al2O3 catalyst.

Keywords : Hydrodenitrogenation (HDN); Hydrogenation; Stacked beds; Pyridine.

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