The zeolite Y is considered as a leading catalyst for FCC industry. The acidity and porosity modification
play important roles in determining the final catalytic properties of zeolite Y. The alkaline treatment of
zeolite Y by dealumination and alkaline treatment with NaOH and NaOH&TBPH was investigated. The
zeolites were characterized by X-ray diffraction, low-temperature adsorption of nitrogen, transmission
electron microscope, NMR, NH3-TPD and IR study of acidity. Accordingly, the hierarchical porosity and
acidity property were discussed systematically. Finally, the catalytic performance of the zeolites Y was
evaluated in the cracking of 1,3,5-TIPB. It was found that desilication with NaOH&TBPH ensured the more
uniform intracrystalline mesoporosity with higher microporosity, while preserving higher B/L ratio and
moderate Brønsted acidities resulting in catalysts with the most appropriated acidity and then with better
catalytic performance.