Nanodispersed Suspensions of Zeolite Catalysts for Converting Dimethyl Ether into Olefins


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Nanodispersed suspensions that are effective in DME conversion and stable in the reaction zone in a three-phase system (slurry reactor) are obtained from MFI zeolite commercial samples (TsVM, IK-17-1, and CBV) in liquid media via ultrasonic treatment (UST). It is found that the dispersion medium, in which ultrasound affects zeolite commercial sample, has a large influence on particle size in the suspension. UST in the aqueous medium produces zeolite nanoparticles smaller than 50 nm, while larger particles of MFI zeolite samples form in silicone or hydrocarbon oils. Spectral and adsorption data show that when zeolites undergo UST in an aqueous medium, the acid sites are redistributed on the zeolite surface and the specific surface area of the mesopores increases. Preliminary UST in aqueous media of zeolite commercial samples (TsVM, IK-17-1, and CBV) affects the catalytic properties of MFI zeolite nanodispersed suspensions. The selectivity of samples when paraffins and olefins form is largely due to superacid sites consisting of OH groups of hydroxonium ion H3O+.

作者简介

N. Kolesnichenko

Topchiev Institute of Petrochemical Synthesis

Email: yashina@ips.ac.ru
俄罗斯联邦, Moscow, 117912

O. Yashina

Topchiev Institute of Petrochemical Synthesis

编辑信件的主要联系方式.
Email: yashina@ips.ac.ru
俄罗斯联邦, Moscow, 117912

N. Ezhova

Topchiev Institute of Petrochemical Synthesis

Email: yashina@ips.ac.ru
俄罗斯联邦, Moscow, 117912

G. Bondarenko

Topchiev Institute of Petrochemical Synthesis

Email: yashina@ips.ac.ru
俄罗斯联邦, Moscow, 117912

S. Khadzhiev

Topchiev Institute of Petrochemical Synthesis

Email: yashina@ips.ac.ru
俄罗斯联邦, Moscow, 117912

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