Crystallization of a Pelletized High-Crystallinity SAPO-11 Molecular Sieve with a Hierarchical Pore Structure

Abstract

A way of synthesizing a pelletized high-crystallinity SAPO-11 molecular sieve with a hierarchical pore structure is proposed for the first time. Crystallization is based on preparing pellets composed of 70 wt % of powdered SAPO-11 and 30 wt % of a silicoaluminophosphate binder that is transformed into SAPO-11 during crystallization to form a single system of silicoaluminophosphate crystal aggregates. This crystallization allows the creation of pelletized SAPO-11 characterized by a high degree of crystallinity and phase purity, specific surface area SBET of 212 m2/g and micro-, meso-, and macropore volumes of 0.08, 0.11, and 0.55 cm3/g, respectively. It is shown that meso- and macropores formed between the SAPO-11 crystal aggregates.

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 18-33-00077 mol_a.

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Correspondence to M. R. Agliullin.

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Translated by M. Timoshinina

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Agliullin, M.R., Khairullina, Z.R. & Kutepov, B.I. Crystallization of a Pelletized High-Crystallinity SAPO-11 Molecular Sieve with a Hierarchical Pore Structure. Catal. Ind. 12, 273–279 (2020). https://doi.org/10.1134/S2070050420040029

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Keywords:

  • zeolites
  • silicoaluminophosphate SAPO-11
  • hierarchical pore structure
  • pelletized catalysts