TUNGSTEN AND RHENIUM AS HYDROGENATION AGENTS IN THE HYDRODENITROGENATION OF PYRIDINE USING STACKED BED CATALYST SYSTEMS

• DOI: 10.4067/s0717-97072015000200015
• Publication Date: 2015-08-10T10:04:04Z
• Authors: R BASSI; M VILLARROEL; F.J GIL LLAMBÍAS; E CAMÚ; P BAEZA
• Keywords: Pyridine; Hydrogenation; 02 engineering and technology; Stacked beds; 0204 chemical engineering; Hydrodenitrogenation (HDN); 7. Clean energy

ABSTRACT This study analyses the hydrodenitrogenation (HDN) of pyridine using a stacked bed catalyst system, composed of a first hydrogenating bed of Re/γ-Al 2 O 3 or W/γ-Al 2 O 3 , over a second bed of Ni-Re/γ-Al 2 O 3 (HDN bed). Using potentiometric methods, it can be seen that the Re/γ-Al 2 O 3 shows higher acidic strength than the W/γ-Al 2 O 3 . 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-Al 2 O 3 or W/γ-Al 2 O 3 beds would favour the formation of hydrogenated intermediary products, facilitating the removal of N-containing molecules via HDN on the Ni-Re/γ-Al 2 O 3 catalyst. Keywords: Hydrodenitrogenation (HDN); Hydrogenation; Stacked beds; Pyridine. e-mail: [e-mail] 1. INTRODUCTION In recent years, several different reports have shown that petroleum will continue to be one of the main energy sources until the year 2030 and that the global energy system will continue to be dominated by fossil fuels