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. 2022 Jul 22;15(1):381–396. doi: 10.1007/s12633-022-02008-8

The Effects of SiO2/Al2O3 and H2O/Al2O3 Molar Ratios on SAPO-34 Catalyst in the Methanol to Olefin Process

Ehsan Kianfar 1,2,✉
PMCID: PMC9305030

Abstract

Informed through synthesis and characterization of NH 3 TPD, BET techniques, the current study investigated the right contribution of silicon and water content on a 9 sample SAPO-34 catalyst with different molar ratios. The final prepared SAPO-34 catalytic performed reaction for the Methanol to olefin process was processed and reported at 410 0 C a reactor of fixed-bed. It was shown that catalysts with different SiO2 /Al2O3 and H2O/Al 2 O 3 ratios demonstrated high ethylene and propylene selectivity, due to their intensified crystallinity and size of crystals (1.3 to 1.7 μm). The highest degrees of ethylene and propylene selectivity for 3 samples were 50.25, 21.20, and 48.44, 19.16 respectively. Samples with ratios of different that possess high density and acute acidic sites to deactivate rapidly. The high density of acute acidic sites promoted the ultimate response to saturated hydrocarbons and aromatics based on olefins’ hydrogen transfer to and resulted in the coke generation on the top layer of the catalyst.

Keywords: Methanol to olefin, BET, Ethylene, Propylene

Acknowledgements

Department of Chemical Engineering, Arak Branch, Islamic Azad University, Arak, Iran.

Young Researchers and Elite Club, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.

Nomenclature

MTO

Methanol to olefin

NH3-TPD

NH3 Temperature-Programmed Desorption

WHSV

weigh hourly space velocity

OCT

Olefins Conversion Technology

SAPO

silica-alumina-phosphates

Author Contributions

Not applicable.

Data Availability

Not applicable.

Declarations

Ethics Approval

Not applicable

Consent to Participate

Not applicable

Consent for Publication

Not applicable

Conflict of Interest

The authors declare that they have no conflicts of interest.

Research Involving Human Participants and/or Animals

Not applicable

Footnotes

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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