Y zeolites with different pore structural and acid properties were studied by XRD,N_2 physical adsorption,NH_3-TPD and Py-FTIR.The adsorption and diffusion properties of benzene in hierarchical pore Y zeolites were investigated by using intelligent gravimetric analyzer(IGA).It was found that there was no obvious change in the crystal structure of the Y zeolites in the process of modification,while the pore structure,acid type,acidity and acid strength were changed.The mass transfer performance of benzene mo...