Activity, selectivity, and adsorbed reaction intermediates/reaction side products in the selective methanation of CO in reformate gases on supported Ru catalysts

Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

“…Adsorbed OH bands appear in the 3500-3750 cm -1 range for all three catalysts [15,56]. The intensities for the bands were higher for the Mo-containing catalysts than for the non-promoted sample, indicating that more OH was available on the Mo-containing catalyst for CHx gasification to CO, and could promote the OH gasification route rather than through O only, even if carbon was formed on the Ni catalyst.…”

“…At all three times a distinguishable difference between the three catalysts was observed for the bands ranging from 1760 -2094 cm -1 , which are attributed to molecular CO adsorption. Bands in the 2100-2000 cm -1 region are assigned to linear CO adsorption, which is favored over isolated metal sites (corners and edges), while bands in the 1900-1800 cm -1 range are most likely a contribution of bridging CO, adsorbed on more flat and extensive metal sites [53,55,56]. For the 15Ni and the 0.1Mo catalysts, within the first 5 min of the reaction, CO was adsorbed more on the less reactive flat sites.…”

“…As the conversion increased, with time Ni surface ensembles change to smaller islands with more active edge sites, enhancing the linear adsorption of CO. This change is based on the increase in the amount of linearly adsorbed CO and a decrease in bridging CO [53,55,56].…”

Improved Performance of Ru/γ‐Al2O3 Catalysts in the Selective Methanation of CO in CO2‐Rich Reformate Gases upon Transient Exposure to Water‐Containing Reaction Gas

“…Therefore, CO 2 dissociation and subsequent methanation is the only pathwayf or CO 2 conversion that has to be considered herein. [16] Also, in this case, we first performed ar eference measurement in dry SR-ref 100 (Table 3), compared with 9.9 10 À6 mol g Ru À1 s…”

Hydrogen Production by Glycerol Steam Reforming with Ru‐based Catalysts: A Study on Sn Doping

“…These Ru species were proposed to result from oxidative rupture of Ru-Ru bonds and, by some authors, identified as oxidized Ru nþ sites. [29] In Ru/Al 2 O 3 and Ru/SiO 2 catalysts this signal was accompanied by a peak at 2135 cm À1 .…”