Cerium ion-exchanged zeolites Y (Ce, H (Na) Y)  were prepared by ion-exchange method. The zeolites were characterized by X-ray powder diffraction pattern fitting, infrared spectrscopy of pyridine molecules absorbed on zeolites (Py-IR)and NH3-temperature programmed desorption method(NH3-TPD). Cerium ions have a strong preference for certain sites within zeolites cavities. With increasing cerium concentration, the proton of bridging hydroxyls leaves easily. The strong acid sites from the strong polarizing force by cerium ions exert more influence on catalytic cracking performance. Model catalysts incorporating zeolites Ce, H (Na) Y were tested on an advanced cracking evaluation equipment. With increasing cerium loading, gasoline and conversion dramatically increase by 4.62% and 4.4%, respectively, while bottom decreases by 4.0%.

Influence of cerium ions on cracking performance of zeolites Ce, H (Na) Y

245th National Meeting (2013)

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