Ultrasound-assisted rapid hydrothermal design of efficient nanostructured MFI-Type aluminosilicate catalyst for methanol to propylene reaction

Sadeghpour, Parisa; Haghighi, Mohammad; Ebrahimi, Alireza

doi:10.1016/j.ultsonch.2020.105416

Cited by 17 publications

(3 citation statements)

References 49 publications

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“…According to the literature, it is found that the application of ultrasound leads to improving influences on nucleation process, crystal growth rate, crystallite size, morphology, and particle size distribution. [107][108][109] Moradiyan et al [110] found that utilization of the ultrasound method led to a faster synthesis time, a decrease of crystallite size, an increase of surface area, and a dominant mesopore structure. Hence, they obtained a conclusion that the SAPO-34 catalysts with hydrothermal ultrasound assisted method catalyst has improved the lifetime of the MTO process in comparison to conventional catalysts.…”

Section: ) Fluoride Etching Methodsmentioning

confidence: 99%

“…Ultrasound treatment played an important role in synthesis process, which could enhance the nucleation process and crystal growth. According to the literature, it is found that the application of ultrasound leads to improving influences on nucleation process, crystal growth rate, crystallite size, morphology, and particle size distribution [107–109] . Moradiyan et al [110] .…”

Section: Synthesis Of Hierarchical Sapo‐34 Molecular Sievesmentioning

confidence: 99%

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Synthesis and Applications of SAPO‐34 Molecular Sieves

Cheng

et al. 2021

Chemistry A European J

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Silicoaluminophosphate zeolite (SAPO‐34) has been attracting increasing attention due to its excellent form selection and controllability in the chemical industry, as well as being one of the best industrial catalysts for methanol‐to‐olefin (MTO) reaction conversion. However, as a microporous molecular sieve, SAPO‐34 easily generates carbon deposition and rapidly becomes inactivated. Therefore, it is necessary to reduce the crystal size of the zeolite or to introduce secondary macropores into the zeolite crystal to form a hierarchical structure in order to improve the catalytic effect. In this review, the synthesis methods of conventional SAPO‐34 molecular sieves, hierarchical SAPO‐34 molecular sieves and nanosized SAPO‐34 molecular sieves are introduced, and the properties of the synthesized SAPO‐34 molecular sieves are described, including the phase, morphology, pore structure, acid source, and catalytic performance, in particular with respect to the synthesis of hierarchical SAPO‐34 molecular sieves. We hope that the review can provide guidance to the preparation of the SAPO‐34 catalysts, and stimulate the future development of high‐performance hierarchical SAPO‐34 catalysts to meet the growing demands of the material and chemical industries.

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Section: ) Fluoride Etching Methodsmentioning

confidence: 99%

Section: Synthesis Of Hierarchical Sapo‐34 Molecular Sievesmentioning

confidence: 99%

Synthesis and Applications of SAPO‐34 Molecular Sieves

Cheng

et al. 2021

Chemistry A European J

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“…Another promising technique is the ultrasound-assisted synthesis of zeolites, which offers several advantages, including increased surface area and shorter synthesis time [213,214]. These effects have been confirmed in the syntheses of MCM-22 [215], ZSM-5 [182,216], and SAPO-11 [217] zeolites, where the ultrasound-assisted method promotes the dissolution of reactants and accelerates the progression of crystallization.…”

Section: Cost-effective and Eco-friendly Synthesis Approachesmentioning

confidence: 97%

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Aljajan,

Stytsenko,

Rubtsova

et al. 2023

Catalysts

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Upgrading the properties of diesel fractions is considered one of the crucial processes in the petrochemical industry; and for this purpose in laboratory-scale researching it is studied on the base of the hydroisomerization of n-hexadecane as a main model reaction. Recently, zeolite-based bifunctional catalysts have proven their efficiency due to their remarkable acidity, shape-selectivity and relative resistance to deactivation. In this review, different topological-type zeolite-based catalysts, the mechanism of their catalytic effect in n-C16 isomerization, and the principles of shape-selectivity are reviewed. A comparison of their structural-operational characteristics is made. The impact of some feedstock impurities on the catalyst’s performance and deactivation due to carbonaceous deposits as well as various modern eco-friendly cost-effective synthesis techniques are also discussed.

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