Li Jinjun Hao Zhengping Hu Chun (Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China)
<正> Ceria- and alumina-pillared interlayered clays were synthesized in the presence of PEO surfactant by using la ponite clay as raw material. And the synthesized pillared clays were used as supports to load palladium catalysts for complete oxidation of benzene. Nitrogen adsorption/desorption experiments reveal that the pillared clays have higher specific surface area of more than 400 m2 ·g-1 and larger total pore volume of more than 0.75 m2 ·g-1. The activity tests show that ceria pillar exhibited promoting effect on the activity of the palladium catalysts, and ceria-pillared clay supported palladium catalyst catalyzed the complete oxidation of benzene at less than 250℃. The calcination temperature affects the activity of the catalysts significantly, and it is found that the optimal calcination temperature are 600 and 400℃for ceria-and alumina-pillared clay supported palladium catalysts, respectively.
ceria; pillared clays; palladium catalysts; VOCs; catalytic complete oxidation
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