Nanodispersed Suspensions of Zeolite Catalysts for Converting Dimethyl Ether into Olefins
- Authors: Kolesnichenko N.V.1, Yashina O.V.1, Ezhova N.N.1, Bondarenko G.N.1, Khadzhiev S.N.1
-
Affiliations:
- Topchiev Institute of Petrochemical Synthesis
- Issue: Vol 92, No 1 (2018)
- Pages: 118-123
- Section: Physical Chemistry of Nanoclusters and Nanomaterials
- URL: https://journals.rcsi.science/0036-0244/article/view/169866
- DOI: https://doi.org/10.1134/S0036024418010120
- ID: 169866
Cite item
Abstract
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+.
About the authors
N. V. Kolesnichenko
Topchiev Institute of Petrochemical Synthesis
Email: yashina@ips.ac.ru
Russian Federation, Moscow, 117912
O. V. Yashina
Topchiev Institute of Petrochemical Synthesis
Author for correspondence.
Email: yashina@ips.ac.ru
Russian Federation, Moscow, 117912
N. N. Ezhova
Topchiev Institute of Petrochemical Synthesis
Email: yashina@ips.ac.ru
Russian Federation, Moscow, 117912
G. N. Bondarenko
Topchiev Institute of Petrochemical Synthesis
Email: yashina@ips.ac.ru
Russian Federation, Moscow, 117912
S. N. Khadzhiev
Topchiev Institute of Petrochemical Synthesis
Email: yashina@ips.ac.ru
Russian Federation, Moscow, 117912