Morphology control of SAPO-34 and its catalytic performance for methanol to olefin reaction

SAPO-34 molecular sieves with various special morphologies were successfully synthesized using mixed templates and by varying the silicon content in the gel. The synthesized SAPO-34s were well characterized by XRD, XRF, SEM, N 2 adsorption-desorption, solid state NMR and NH 3 -TPD measurements. It i...

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Bibliographic Details
Published in:New journal of chemistry 2022-03, Vol.46 (11), p.5171-5175
Main Authors: Guo, Lei, Zhu, Weiping, Xing, Aihua, Li, Fei, Guo, Zhihui
Format: Article
Language:English
Subjects:
Ammonia
Methanol
Molecular sieves
Morphology
Nanoparticles
NMR
Nuclear magnetic resonance
Propylene
Selectivity
Silicon
Structural hierarchy
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Summary:SAPO-34 molecular sieves with various special morphologies were successfully synthesized using mixed templates and by varying the silicon content in the gel. The synthesized SAPO-34s were well characterized by XRD, XRF, SEM, N 2 adsorption-desorption, solid state NMR and NH 3 -TPD measurements. It is found that a different silicon content not only affects the acidity of the synthesized SAPO-34s, but also changes the morphology dramatically. With the increase of the starting silicon content, the morphology of the synthesized SAPO-34s changes from nanoparticles to regular spherical aggregates. For the methanol to olefin (MTO) reaction, the nanoparticles SAPO-34 S-0.3 with suitable acidity and hierarchical structures exhibit higher selectivity to ethylene plus propylene and longer catalyst lifetime. SAPO-34 molecular sieves with various special morphologies were synthesized using mixed templates and by varying the silicon content in the gel.
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj00336h