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Direct Synthesis of a Fluidizable SAPO-34 Catalyst for a Fluidized Dimethyl Ether-to-Olefins Process

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Abstract

The dimethyl ether to olefins process is very important for converting coal to chemicals. A SAPO-34 molecular sieve with a particle size up to 50 μm has been synthesized with morpholine as the template. The cold model fluidization experiment indicates that the SAPO-34 catalyst with average size of 45–50 μm is of good fluidization properties. After high temperature steam treatment at 1073 K for 8 h, this large fluidizable catalyst showed good reactivity and selectivity for the dimethyl ether to olefins (DTO) reaction in a micro-reactor. X-ray diffraction characterization showed that the structure of the catalyst was maintained well. A fluidized reactor of 50 mm inner diameter was used to carry out the DTO reaction, which showed that the fluidizable SAPO-34 is a selective catalyst for light olefin production.

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Acknowledgments

The work was supported by the Foundation for the Natural Scientific Foundation of China (No. 20736004) and Tsinghua University Open Laboratory Foundation.

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Correspondence to Fei Wei.

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Chen, Y., Zhou, H., Zhu, J. et al. Direct Synthesis of a Fluidizable SAPO-34 Catalyst for a Fluidized Dimethyl Ether-to-Olefins Process. Catal Lett 124, 297–303 (2008). https://doi.org/10.1007/s10562-008-9454-0

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  • DOI: https://doi.org/10.1007/s10562-008-9454-0

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