Effect of calcination temperature on the catalytic activity of copper supported on γ-alumina for the water-gas-shift reaction

Promotion Effect of FeOx Addition on the Catalytic Activity of Supported Cu Catalysts for the Water–gas Shift Reaction

“…Figure 1 shows the catalytic activities of CuFeO x /Al 2 O 3 (1.0) and Cu/Al 2 O 3 as a function of calcination temperature. The less change in the catalytic activity of Cu/Al 2 O 3 was observed in the range of 873-1073 K of calcination temperature, as reported previously [10]. On the other hand, the catalytic activity of Cu-FeO x /Al 2 O 3 increased with calcination temperature, reached a maximal value at 973 K, and then decreased with further increasing calcination temperature.…”

“…Temperature-programmed reduction (H 2 -TPR) was carried out by flowing 5 vol%H 2 /N 2 (30 cm 3 min -1 ) in the temperature range of 373-1173 K. The sample temperature increased with a rate of 2 K min -1 and the amount of H 2 consumed was monitored by a thermal conductivity detector of a gas chromatograph (Shimadzu, GC-8AIT). The accessible Cu fraction was measured by N 2 O decomposition method described elsewhere [10,12,13].…”

“…Recently, we have reported that Cu/Al 2 O 3 catalysts calcined at relatively high temperature, 1073 K, contain both highly dispersed Cu and CuAl 2 O 4 spinel and the former species act as active sites for the WGS reaction [10]. Eguchi and co-workers [9] have reported that 5 wt%Cu-5 wt%ZnO/Al 2 O 3 catalyst prepared by the impregnation method was active for the WGS reaction.…”

“…7-10% CO). Cu-based mixed oxide catalysts [1][2][3][4][5] and supported Cu catalysts [6][7][8][9][10][11] have been reported to exhibit the high activity for the WGS reaction.…”

Water–Gas Shift Reaction Over Aluminum Promoted Cu/CeO2 Nanocatalysts Characterized by XRD, BET, TPR and Cyclic Voltammetry (CV)

“…Andreeva et al [14] reported that the addition of aluminum could improve the stability of Au/CeO 2 catalysts for WGS reaction. Yahiro et al [15] reported a highly catalytic activity of copper supported on c-aluminum for WGS reaction. And several CeO 2 -doped CuO=c-Al 2 O 3 catalysts, which were prepared by wet impregnation method, were evaluated for the CO oxidation [16], steam reforming of methanol [17], NO+CO reaction [18] and so on.…”