Using prepared polystyrene (PS) as colloidal crystal template,three-dimensional ordered macroporous(3DOM) phosphotungstic acid (HPW)/Al2O3 catalyst with macropore diameter of 250nm was synthesized.Its structure was characterized by scanning electron microscope (SEM),transmission electron microscope (TEM),N2 adsorption-desorption isotherms,XRD and FT-IR.Its catalytic oxidation performance was evaluated.The results shown that the macropores (250nm) of the catalyst were interconnected and the HPW molecules with Keggin structure was uniformly distributed in the Al2O3 macroporous frame structure.It can oxidize 98.5% dibenzothiophene of the simulated fuel to sulfone in 3 hours at 60℃,and the catalytic oxidation performance was basically unchanged after 6 times recycling,while the performance of the recovery cycle decreased by only 3% for 12 times.
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基金资助
台州市科学技术局科研项目(2002gy03)
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