The Effect of the Precipitator Concentration on the Activity of Mesoporous Cu-Ce-La Mixed Oxide Catalyst for Water-Gas Shift Catalyst

Abstract

Cu-Ce-La mixed oxide catalysts were prepared by co-precipitation methods with a series of precipitator concentration and characterized using X-ray diffraction, BET, TPR, and catalytic reaction for the water-gas shift. The Cu-Ce-La mixed oxide prepared by 4.0 mol/L NaOH concentration presented the highest activity and thermal stability. the precipitator concentration influence the activity of catalyst via the stability of crystal structure and mesoporous structure. La3+or Ce4+substituted copper ion of CeO2framework during reaction process. The concentration of precipitator can control pore diameter of catalyst in synthetical process. The raising of precipitator concentration, from 0.5 to 2.0 mol/L, lead to enhancing of synergistic effects between CuO and CeO2.

Low-Temperature WGS Reaction

“…Zhi et al [31] reported the effect of the precipitator concentration on the activity of mesoporous Cu-Ce-La mixed oxide catalyst. They concluded that the precipitator concentration influences the activity of catalyst via the stability of crystal structure and mesoporous structure.…”