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the adsorption volumes of N2 of Cu0.4Zn5.6Al2O9, Cu0.4Zn2.8Mg2.8Al2O9, Cu0.4Zn0.6Mg5.0Al2O9, Cu0.4Zn0.3Mg5.3Al2O9 and Cu0.4Mg5.6Al2O9 at low pressure (p/po < 0.055) are 15.4, 7.7, 15.8, 19.7 and 30.5 cm3/g, respectively. These data indicated that the lamellar-structured catalyst would be a micropore-free material.
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