Abstract

Citral was hydrogenated over Ni on alumina wash-coated cordierite monoliths in a screw impeller batch reactor. The prepared catalyst was characterized by means of nitrogen adsorption (BET), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The performance of the monolith reactor configuration at different temperatures and pressures was compared. Reasonable reaction rate was obtained even after 18 consecutive experiments without regeneration of the catalyst. At temperatures up to 80°C and 5 bar pressure the selectivity to citronellal was ca. 93 %. Increasing the temperature to 100°C decreased the selectivity of citronellal to 65 %. At 100°C and 40 bar pressure the selectivity of citronellal was diminished to 1.4 % due to the formation of the fully hydrogenated product 3,7-dimethyloctanol with a selectivity of 93 %.

Recommended Citation

Aumo, Jeannette; Mikkola, Jyri-Pekka; Bernechea, Jose; Salmi, Tapio; and Murzin, Dmitry (2005) "Hydrogenation of Citral Over Ni on Monolith," International Journal of Chemical Reactor Engineering: Vol. 3: A25.
Available at: http://www.bepress.com/ijcre/vol3/A25