Characterization and cracking performance of zirconium-modified Y zeolite

Characterization and cracking performance of zirconium-modified Y zeolite

Zirconium-modified Y zeolites (ZrUSY) were prepared by impregnation of the zeolite with anhydrous-ethanol and aqueous ion exchange methods. The ZrUSY samples were characterized by powder X-ray diffraction, nitrogen physisorption, and Fourier transform infrared spectroscopy. The results indicated tha...

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Bibliographic Details
Main Authors: Shanqing Yu, Jiasong Yan, Wei Lin, Jiexiao Zhang, Jun Long
Format: Article
Language:English
Published: Elsevier 2021-01-01
Series:Catalysis Communications
Subjects:
Zirconium
Y zeolite
Stability
Acidity
Catalytic cracking
Online Access:http://www.sciencedirect.com/science/article/pii/S1566736720302478
Description
Summary:Zirconium-modified Y zeolites (ZrUSY) were prepared by impregnation of the zeolite with anhydrous-ethanol and aqueous ion exchange methods. The ZrUSY samples were characterized by powder X-ray diffraction, nitrogen physisorption, and Fourier transform infrared spectroscopy. The results indicated that ZrUSY prepared by the impregnation with anhydrous-ethanol method showed higher crystallinity, specific surface area and hydrothermal stability. The incorporation of Zr into other Y zeolites leads to an increase of the Brønsted acid site concentration and a decrease of the Lewis acid site concentration compared to the ultra-stable Y zeolite (USY). The ZrUSY was much more favorable towards heavy oil FCC conversion with decreasing coke yield and improving olefins selectivity.
ISSN:1873-3905

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