Cu/ZnO/Al2O3 catalysts for WGS(Water gas shift; CO + H2O → CO2 + H2) reaction were synthesized by co-precipitation method with the fixed ratio of Cu/Zn/Al precursors as 45/45/10 mol%. Cu and Zn precursor were added into Na2CO3 solution for precipitation and aged for 24h. During the aging period, Al precursor was added into the aging solution with different time gap from the precipitation starting point: 6h, 12h, and 18h. SEM, XRD, BET surface measurement, N2O chemisorption and TPR analysis were performed to characterize the resulting catalysts. The catalytic activity tests were carried out at a GHSV of 27,986 h-1 and a temperature range of 200 to 400 C. The catalyst morphology and crystalline structures were not affected by Al precursor addition time. The Cu dispersion degree, surface area, and pore diameter depended on the aging time of Cu-Zn precipitate without the presence of Al2O3 precursor. Also, the interaction between the active substance and Al2O3 became stronger as aging duration, with Al precursor presented in the solution, increased. Therefore, it was confirmed that Al precursor addition time affected the catalytic characteristics and their catalytic activities.

Catalytic characteristic of Cu/ZnO/Al2O3 catalyst for WGS reaction: Effect of Al precursor addition time

251st National Meeting (2016)

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