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The Structure and Stability of the Mg-HZSM-5/Al2O3 Catalyst for Synthesis of Olefins from DME: The Influence of Thermal and Hydrothermal Treatment
https://doi.org/10.18412/1816-0387-2019-1-50-58
Abstract
The studies were focused on changes in the structure, texture and acid properties of the Mg-HZSM-5/Al2O3 catalyst upon its treatment at different temperatures (400 and 500 °С) and times (6 and 12 h). Physicochemical techniques such as X-ray fluorescence analysis, XPS, solid-state 27Al NMR, nitrogen adsorption, DRIFT spectroscopy, ammonia TPD were used for sample characterization. The catalytic activitites of the initial and treated samples were studied regarding conversion of dimethyl ether (DME) to lower olefins. It was shown that the initial activity of the Mg-containing zeolite catalyst was dependent of the total acidity of the surface and independent of the initial strength distribution of the acid sites, and the catalyst stability depended on the morphology.
About the Authors
M. I. Afokin
Topchiev Institute of Petrochemical Synthesis, Moscow
Russian Federation
Russian Federation
I. A. Davydov
Topchiev Institute of Petrochemical Synthesis, Moscow
Russian Federation
Russian Federation
E. G. Galanova
Topchiev Institute of Petrochemical Synthesis, Moscow
Russian Federation
Russian Federation
M. V. Magomedova
Topchiev Institute of Petrochemical Synthesis, Moscow
Russian Federation
Russian Federation
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Review
For citations:
Afokin M.I., Davydov I.A., Galanova E.G., Magomedova M.V. The Structure and Stability of the Mg-HZSM-5/Al2O3 Catalyst for Synthesis of Olefins from DME: The Influence of Thermal and Hydrothermal Treatment. Kataliz v promyshlennosti. 2019;19(1):50-58. (In Russ.) https://doi.org/10.18412/1816-0387-2019-1-50-58
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