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Atmospheric pressure synthesis of nano-scale SAPO-34 catalysts for effective conversion of methanol to light olefins

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Abstract

Nano-scale SAPO-34 zeolites were successfully synthesized under atmospheric pressure for the first time through a dry gel conversion route with the assistance of magnesium aluminum silicate (Al2MgO8Si2). Under atmospheric pressure, the crystallization, calcination, and even catalytic evaluation of SAPO-34 can be carried out consecutively in the same fixed-bed reactor. Characterization and systematic studies indicated that the use of crystal seeds can improve the relative crystallinity of SAPO-34, and the as-synthesized SAPO-34 exhibits relatively high crystallinity, a high surface area and a uniform crystal size of 25 nm. Compared with conventional SAPO-34, the nano-scale SAPO-34 exhibited a higher selectivity to light olefins (83.6%) when methanol is completely converted. These results offer a potential way to synthesize zeolites by a safe and sustainable process under atmospheric pressure.

Graphical abstract: Atmospheric pressure synthesis of nano-scale SAPO-34 catalysts for effective conversion of methanol to light olefins

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Publication details

The article was received on 16 Jul 2019, accepted on 29 Aug 2019 and first published on 10 Sep 2019


Article type: Paper
DOI: 10.1039/C9SE00517J
Sustainable Energy Fuels, 2019, Advance Article

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    Atmospheric pressure synthesis of nano-scale SAPO-34 catalysts for effective conversion of methanol to light olefins

    M. Lyu, C. Yang, Z. Liu, T. Wang, H. Liu, X. Chen and Y. Sun, Sustainable Energy Fuels, 2019, Advance Article , DOI: 10.1039/C9SE00517J

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