“…Various support materials such as carbon nanotube [9], silica [10], V 2 O 5 /Al 2 O 3 [11] and SiO 2 /Al 2 O 3 [12] have been studied for HDS catalysts. Of these supports, titania-containing supports, such as TiO 2 [13], nano-TiO 2 [14,15], Al 2 O 3 -TiO 2 [16,17], SiO 2 -TiO 2 [18], showed remarkable HDS activity compared to the traditional alumina catalysts.…”