Highly active CoMoS phase on titania nanotubes as new hydrodesulfurization catalysts

Influence of Na content on behavior of NiMo catalysts supported on titania nanotubes in hydrodesulfurization

“…Thus, CoMo catalysts supported on high-surface-area (more than 300 m 2 g À1 ) nanostructured titania powder showed an activity twice as high in dibenzothiophene HDS as a commercial CoMo/alumina catalyst [15]. Similar results were obtained for CoMoS catalysts supported on titania nanotubes with an internal diameter of $5.5 nm and a surface area of 236 m 2 g À1 [16,17]. High HDS activity observed in these works was attributed to high dispersion of catalytically active MoS 2 particles and high sulfidability of Mo species [15][16][17].…”

“…Similar results were obtained for CoMoS catalysts supported on titania nanotubes with an internal diameter of $5.5 nm and a surface area of 236 m 2 g À1 [16,17]. High HDS activity observed in these works was attributed to high dispersion of catalytically active MoS 2 particles and high sulfidability of Mo species [15][16][17]. In [18], CoMo catalysts supported on TiO 2 nanotubes were investigated for selective hydrodesulfurization of thiophene giving high catalytic performance.…”

HDS performance of NiMo catalysts supported on nanostructured materials containing titania

“…CoMo catalysts supported on titania nanotubes also showed high activity in HDS of dibenzotiophene [18,19] and selective hydrodesulfurization of thiophene [20]. High HDS activity observed in the above works was attributed to high dispersion of catalytically active MoS 2 particles and high sulfidability of Mo species [17][18][19]. Regarding NiW catalysts, it was also found that the catalysts supported on TiO 2 nanotubes resulted in two times higher thiophene conversion in comparison with the alumina and titania supported ones [21].…”

“…For example, CoMo catalysts supported on high surface area (more than 300 m 2 /g) nano-structured titania powder showed activity twice higher in dibenzothiophene HDS than a commercial CoMo/alumina catalyst [17]. CoMo catalysts supported on titania nanotubes also showed high activity in HDS of dibenzotiophene [18,19] and selective hydrodesulfurization of thiophene [20]. High HDS activity observed in the above works was attributed to high dispersion of catalytically active MoS 2 particles and high sulfidability of Mo species [17][18][19].…”

A novel catalyst of Ni,W-surface-Ti-rich-ETS-10/Al 2 O 3 : Its role and potential of HDS performance for steric hindered sulfur compound 4,6-DMDBT

“…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.…”