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 CeO₂ framework 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.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 597-601
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.597
• Online since: February 2013
• Authors: Ke Duan Zhi, Quan Sheng Liu, Jing Li, Run Xia He, Fang Wu
• Keywords: Cu-Ce-La Mixed Oxide Catalyst, Mesoporous Structure, Precipitator Concentration, Water-Gas Shift Reaction

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