A facile way to improve zeolite Y-based catalysts' properties and performance in the isobutane-butene alkylation reaction

Different amounts of SiO 2 were added to the Al 2 O 3 binders to investigate the binder effect on zeolite Y-based catalysts. The added SiO 2 improved the mesopore volume and acidity of the catalysts. Characterization results showed that the catalysts' acid amount increased with increasing the S...

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Bibliographic Details
Published in:RSC advances 2020-08, Vol.1 (49), p.2968-2976
Main Authors: Zhou, Shunli, Zhang, Chengxi, Li, Yongxiang, Shao, Bingzhang, Luo, Yibin, Shu, Xingtian
Format: Article
Language:English
Subjects:
Alkylation
Aluminum oxide
Catalysts
Chemistry
Phase transitions
Selectivity
Silicon dioxide
Transformation temperature
Zeolites
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Summary:Different amounts of SiO 2 were added to the Al 2 O 3 binders to investigate the binder effect on zeolite Y-based catalysts. The added SiO 2 improved the mesopore volume and acidity of the catalysts. Characterization results showed that the catalysts' acid amount increased with increasing the SiO 2 amount in the binder, which achieved maximum value when 12% SiO 2 was added to the binder. The doped SiO 2 in Al 2 O 3 binders improved the Al 2 O 3 phase transformation temperature, which is crucial for Al species to break out of the phase energy and migrate into the zeolite. The lifetime of catalyst Y-Al 2 O 3 -12SiO 2 is 3.7 times higher than that of Y-Al 2 O 3 -0SiO 2 , and the selectivity of the target products simultaneously improved by 7 percentage point. This work should bring some inspiration to the design and application of zeolite-based catalysts. Increasing the SiO 2 amount in the Al 2 O 3 binder increased the Al migration from the binder into the zeolite, modifying the catalysts' acidic properties.
ISSN:2046-2069
2046-2069
DOI:10.1039/d0ra03762a