【摘 要】
：
ZSM-5 aggregates consisting of superfine and hierarchical nanocrystals (combined with micropores and intra-crystalline mesopores) with an average size of 30 nm
【机 构】
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Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineerin
论文部分内容阅读
ZSM-5 aggregates consisting of superfine and hierarchical nanocrystals (combined with micropores and intra-crystalline mesopores) with an average size of 30 nm were prepared through one-pot synthesis with the assistance of anionic polyacrylamide (APAM).The resultant zeolites (AHN-ZSM-5) were characterized by XRD,ICP-OES,SEM,TEM,BET,NH3-TPD,Py-IR,and TG analyses and evaluated in the methanol to gasoline (MTG) reaction.Characterization results show that the hierarchical ZSM-5 aggregates possessed two kinds of mesopores,namely inter-and intra-crystalline mesopores.The amount of APAM considerably influenced the mesoporosity and textural properties of AHN-ZSM-5 zeolites.With the addition of APAM in the synthesis,the AHN-ZSM-5 zeolites exhibited large mesopore volume,large extal surface area,and appropriate acidity.When applied in the MTG reaction,AHN-ZSM-5 demonstrated a catalytic lifetime that was 1.6 times longer than that of conventional ZSM-5 synthesized in the absence of APAM.
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