Kinetic study for thermal production of hydrogen from H2S by heterogeneous catalysis of vanadium sulfide in a flow system

Biohydrogen

“…At temperatures less than 1775 K, the thermodynamic equilibrium is unfavorable toward hydrogen formation. However, in the presence of catalysts such as platinum-cobalt (at 1275 K), disulfides of Mo or W at 1075 K (Kotera et al, 1976), or other transition metal sulfides supported on alumina (at 775-1075 K), H 2 S decomposition proceeds rapidly (Kiuchi et al, 1982;Bishara et al, 1987;Al-Shamma and Naman, 1989;Megalofonos and Papayannakos, 1997).…”

Molybdenum‐ and vanadium‐containing perovskite electrocatalysts for dissociation of H 2 S

“…Catalytic thermal decomposition of hydrogen sulfide has been studied using vanadium‐containing catalysts by a few numbers of researchers . Performance of vanadium sulfide (V 2 S 3 ) catalyst has been investigated at 673‐1073 K in a thermal diffusion column reactor, and up to 40% hydrogen was obtained in the product gas.…”

“…Performance of vanadium sulfide (V 2 S 3 ) catalyst has been investigated at 673‐1073 K in a thermal diffusion column reactor, and up to 40% hydrogen was obtained in the product gas. Alumina‐supported vanadium oxide (V 2 O 5 ) and vanadium sulfide (V 2 S 3 ) catalysts have been studied at 773‐873 K in tubular reactors, and maximum 70% conversion efficiency has been reported with V 2 S 3 /Al 2 O 3 at 873 K. Catalysts with vanadium have also been used for partial oxidation of C 2 –C 4 hydrocarbons and n ‐butane . Recent studies involving interactions of vanadium‐containing catalysts and electrocatalysts with H 2 S are few in number .…”

“…25 [22][23][24][25][26][27][28] MoS 2 catalyst has been studied in thermal decomposition of H 2 S, and it was reported that 95% of H 2 S was converted into hydrogen and sulfur at the temperature of 1073 K. 22 In another study, various transition metal sulfides were tested in the decomposition of H 2 S, and among these catalysts, MoS 2 exhibited the highest conversion above 873 K. 23 Catalytic thermal decomposition of hydrogen sulfide has been studied using vanadium-containing catalysts by a few numbers of researchers. 26,[29][30][31] Performance of vanadium sulfide (V 2 S 3 ) catalyst has been investigated 26 at 673-1073 K in a thermal diffusion column reactor, and up to 40% hydrogen was obtained in the product gas. Alumina-supported vanadium oxide (V 2 O 5 ) and vanadium sulfide (V 2 S 3 ) catalysts have been studied at 773-873 K in tubular reactors, 29,30 and maximum 70% conversion efficiency has been reported 30 with V 2 S 3 / Al 2 O 3 at 873 K. Catalysts with vanadium have also been used for partial oxidation of C 2 -C 4 hydrocarbons 32,33 and n-butane.…”

Catalytic packed bed non-thermal plasma reactor for the extraction of hydrogen from hydrogen sulfide

“…These studies also concluded the best activity with MoS 2 . Al‐Shamma et al ., have used V 2 O 5 /γ‐Al 2 O 3 for H 2 S decomposition at temperatures 773–873 K and reported that 5 wt% V 2 O 5 /γ‐Al 2 O 3 exhibited the best catalytic activity .…”