每年出版 4 期
ISSN 打印: 2572-9896
ISSN 在线: 2572-990X
Indexed in
EFFECT OF PARTICLE SIZE OF ZSM-5 ZEOLITE ON CATALYTIC PERFORMANCE
摘要
The effect of various synthesis parameters on the particle size of ZSM-5 and its effect on catalytic performance in olefin removal from aromatic streams were investigated. H-ZSM-5 samples with particle size ranging from 50 to 2500 nm were synthesized by varying the structure-directing agents, silica-alumina sources with varied crystallization parameters. Physicochemical properties of the prepared samples were elucidated by characterization techniques such as x-ray diffraction, the Brunauer-Emmett-Teller method, pore-size distribution, scanning electron microscopy, NH3 temperature-programmed desorption, and inductively coupled plasma analysis. Prepared catalyts were tested for olefin removal from aromatic streams. Small-particle-sized ZSM-5 catalysts were observed with high activity and slow deactivation compared to those of large-particle-sized ZSM-5. High activity and stability of small-particle-sized ZSM-5 is attributed to shortened channel lengths, high surface area, mesoporosity, and exposure of more active sites to the substrate molecules. A detailed study on the structure activity correlation ship is established in the present investigation.
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