Abstract
The grinding synthesis of CHA-type SAPO-44 molecular sieves were firstly achieved in the presence of dual templates. The structure and physicochemical properties of several selected SAPO-44 samples were analyzed by XRD, FT-IR, SEM, N2 adsorption–desorption, EDS, and NH3-TPD techniques. It was found that the composition of dual templates has a greater influence on the Si content, crystal size, specific surface area and pore volume, acid strength and distribution of SAPO-44. In comparison to the SAPO-44 catalyst guided by the single template, the dual templates directed SAPO-44 catalysts showed more excellent catalytic performance in the methanol-to-olefin (MTO) reaction, with their catalytic lifetime extending from 90 to 320 min and P/E ratio reaching up to 50. The outstanding catalytic performance exhibited by these SAPO-44 catalysts demonstrated their high application prospect in the methanol to propylene process.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 22168022) and the Basic Research Innovation Group Project of Gansu Province, China (No. 22JR5RA219).
Funding
Funding was provided by National Natural Science Foundation of China (No. 22168022) and Basic Research Innovation Group Project of Gansu Province (No. 22JR5RA219).
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Zhao, X., Wang, H., Peng, X. et al. Grinding synthesis of SAPO-44 in the presence of dual templates: a promising catalyst for methanol to propylene reaction. Reac Kinet Mech Cat 137, 1355–1368 (2024). https://doi.org/10.1007/s11144-024-02572-7
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DOI: https://doi.org/10.1007/s11144-024-02572-7