Renewable hydrogen production via glycerol steam reforming over Ni/CeO2 catalysts obtained by solution combustion method: The effect of Ni loading

CeO2-supported Ni and Co catalysts prepared by a solution combustion method for H2 production from glycerol: the effect of fuel/oxidizer ratio and oxygen excess

“…However, there are no data for the formation of nickel during combustion of a mixture of nickel and cerium nitrates with any fuel, which can be explained by calcination of the freshly prepared samples. 29,31,67,68,70,71 In ref. 62, the NiO phase was established as the only combustion product of nickel nitrate with fuel on a porous support in air, regardless of the φ value, which varied between one and three.…”

“…60 Some studies show that catalysts prepared using this method are comparable with catalysts obtained by classical methods, for example Ni-based supported catalysts for ethanol decomposition and reforming. 26,27,31,61–63 In addition, a high conversion of glycerol (30%) was obtained for the 20 wt% Ni-based catalyst on CeO 2 synthesized by the self-propagation combustion method compared to those by co-precipitation or wet impregnation due to the formation of smaller nickel crystallites. 29…”

“…Ni-containing catalysts are known to have a high capability for C–C, C–H and O–H bond cleavage 10 and can be easily dispersed on a range of supports. A number of nickel catalysts supported on Al 2 O 3 , 11–20 CeO 2 , 17,20–37 MgO, 21,22,30 TiO 2 , 21,22,38 SiO 2 , 13,38–40 and ZrO 2 (ref. 13, 38, and 41–44) have been studied in reforming processes of several renewable feeds, including methanol, 9 ethanol, 14–17,24,26,27,32–34,37,39,41 and glycerol.…”

“…13, 38, and 41–44) have been studied in reforming processes of several renewable feeds, including methanol, 9 ethanol, 14–17,24,26,27,32–34,37,39,41 and glycerol. 11–13,20–23,25,28–31,35,36,38,40,42–44 Al 2 O 3 and CeO 2 as supports are considered effective in terms of high H 2 production and lower coke formation. 17 However, according to ref.…”

“…There are several studies on Ni–Ce and Co–Ce oxide systems prepared by the SCS method, focused on the effect of Sn and Zr, 26 NaCl, 67 and colloidal SiO 2 (ref. 68 and 69) (using glycine fuel), Ni loading (0–8.5 wt%, urea; 31 3–68 wt%, hydrous hydrazine; 70 3.1–15.6 wt%, urea 71 ), Co loading (1–10 wt%, glycine 69 ), the fuel-to-oxidizer ratio ( φ = 0.5–3, hydrous hydrazine 70 ), and the fuel type (glycine and hydrous hydrazine at φ = 2; 70 oxalyldihydrazide, glycerol, carbohydrazide, urea at φ = 1 (ref. 71)) on their physical, chemical, and catalytic properties in various processes.…”