Preparation and Characterization of Core–Shell Composite Zeolite BEA@MFI and Their Catalytic Properties in ESR
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A group of BEA@MFI core–shell zeolite catalysts were successfully constructed with Cu-, Ni-modified Beta core and Co-based Silicalite-1 shell by combining seed induction secondary growth technique and incipient wetness impregnation method. The resulting micro-composite possess a well-defined core–shell structure with high surface area and abundant mesopore in the outer shell, and a relative large truncated bi-pyramidal shape core of Beta. It was further used to correlate their performance in ethanol steam reforming. The obtained xNiyCu-Beta@Co-Silicalite-1 catalysts exhibited excellent catalytic performance compared with the conventional zeolite catalysts. Particularly, the 2.5Ni2.5Cu-Beta@CoSilicalite-1 catalyst exhibited the highest selectivity of hydrogen, the lowest selectivity of by-products, the long-term stability and coking-resistance capability. This is mainly attributed to the excellent textural properties. And the Ni, Cu nanoparticles which incorporated into the core–shell micro-composites protected the properties of active phases effectively. Moreover, the “purification effect” of the Co-base shell is conducive to obtaining high-purity hydrogen through a multiple reaction system.
KeywordsBEA@MFI Polymetallic catalyst Ethanol steam reforming Hydrogen production
We gratefully acknowledge the National Natural Science Foundation of China (No. 51541210) and Natural science fundation of Shanxi Province (No. 201701D121042) for our funding.
Compliance with Ethical Standards
Conflict of Interest
The authors declare no conflicts of interest.
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