Cs-promoted Ni/Fe catalyst as a Cr-free, high temperature shift catalyst for steam methane reformate without additional supply of steam

Iron-Based Catalysts for the High-Temperature Water–Gas Shift (HT-WGS) Reaction: A Review

“…Lee et al published a few papers discussing Ni as a possible replacement for Cr. ,, The incorporation of Ni increased the CO conversion until the Ni content reached 40 wt % by increasing the surface area of the catalysts, but low selectivity was found due to the methanation side reaction. Subsequent studies added cesium and zinc as promoters to inhibit the methanation reaction and to increase the selectivity of HT-WGS reaction.…”

Effect of the Zr/Al Molar Ratio on the Performance of Cu/ZrO2–Al2O3 Catalysts for Methanol Steam Reforming

“…The peak between 150 and 320 °C can be attributed to medium-strong basic sites, and that over 320 °C can be attributed to strong basic sites . The medium–strong basic site is conducive to the adsorption of CO to form the active intermediate formate, which can be further converted into CO 2 and H 2 . The amounts of the three different basic sites for all catalysts are listed in Table S1.…”

Modification strategies of heterogeneous catalysts for water–gas shift reactions

“…145 For example, when Ni–Fe bimetallic catalysts were applied in HTSR, methanation occurred so that the conversion efficiency was reduced and H 2 yield was lowered accordingly. 146 With the addition of Cs, nearly equilibrium conversions of CO were achieved at 400 °C for both 3.9 and 6 wt% Cs loadings; more significantly, CH 4 production was considerably reduced to nearly zero. The further increase of Cs loading (8.7 wt%) caused a reduction in CO conversion, indicating that the optimal amount of Cs was between 3.9 and 6 wt% (Fig.…”