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Methanol conversion to light olefins over surfactant-modified nanosized SAPO-34

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Abstract

Ultrasonic and microwave-assisted aging processes were employed in the static hydrothermal synthesis of nanosized SAPO-34 molecular sieve. A series of nanosized hierarchical SAPO-34 samples with different degrees of mesoporosity were utilized to investigate the impacts of mesoporosity on the catalytic performance of the methanol to olefins (MTO) reaction. The so-called series were synthesized in the presence of various mesogenous templates, such as TPOAC, CTAB, and their combinations. These SAPO-34 samples were characterized by XRD, FE-SEM, BET, FT-IR and NH3-TPD techniques. The catalytic activities were studied in a fixed-bed reactor under atmospheric pressure, 450 °C and WHSV of 4 h−1. Comprehending the results, it can be said that in comparison with the typical catalysts, reliable MTO catalytic lifetime (420 min) as well as sufficiently high light olefins selectivity (90 %) was obtained through the nanosized hierarchical porous SAPO-34 templated with a mixture of 50 % CTAB and 50 % TPOAC. This achievement is associated to its effective combination of acidity and porosity.

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Acknowledgments

This work was financially supported by the Iranian Nanotechnology Initiative Council.

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Authors and Affiliations

  1. Wood and Paper Science Department, Faculity of Natural Resources, Sari Agricultural Sciences and Natural Resource University, P.O. Box 737, Sari, Iran

    Hassan Sharifi Pajaie

  2. Chemical Engineering Department, Babol University of Technology, P.O. Box 484, Babol, 4714871167, Iran

    Majid Taghizadeh

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  1. Hassan Sharifi Pajaie
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Correspondence to Majid Taghizadeh.

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Sharifi Pajaie, H., Taghizadeh, M. Methanol conversion to light olefins over surfactant-modified nanosized SAPO-34. Reac Kinet Mech Cat 118, 701–717 (2016). https://doi.org/10.1007/s11144-016-1023-8

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  • DOI: https://doi.org/10.1007/s11144-016-1023-8

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