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Synthesis and Catalytic Reactivity of MCM-22/ZSM-35 Composites for Olefin Aromatization

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Abstract

A series of MCM-22/ZSM-35 composites has been hydrothermally synthesized and characterized by XRD, SEM, particle size distribution analysis, N2 adsorption and NH3-TPD techniques. Pulse and continuous flow reactions were carried out to evaluate the catalytic performances of these composites in aromatization of olefins, respectively. It was found that MCM-22/ZSM-35 composites could be rapidly crystallized at 174 °C with an optimal gel composition of SiO2/Al2O3=25, Na2O/SiO2=0.11, HMI/SiO2=0.35, and H2O/SiO2=45 (molar ratio), of which the weight ratio of ZSM-35 zeolite in the composite relied on the crystallization time. The coexistence of MCM-22 and ZSM-35 in the composite (MCM-22/ZSM-35=45/55 wt/wt) was observed to exert a notable synergistic effect on the aromatization ability for butene conversion and FCC gasoline updating, possibly due to the intergrowth of some MCM-22 and ZSM-35 layers.

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Correspondence to Longya Xu.

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Niu, X., Song, Y., Xie, S. et al. Synthesis and Catalytic Reactivity of MCM-22/ZSM-35 Composites for Olefin Aromatization. Catal Lett 103, 211–218 (2005). https://doi.org/10.1007/s10562-005-7156-4

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  • DOI: https://doi.org/10.1007/s10562-005-7156-4

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