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RAS Chemistry & Material ScienceЖурнал физической химии Russian Journal of Physical Chemistry

  • ISSN (Print) 0044-4537
  • ISSN (Online) 3034-5537

Conversion of dimethyl ether to light olefins on Rh-Mg/HZSM-5: role of Rh as a modifier

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PII
S0044453725030035-1
DOI
10.31857/S0044453725030035
Publication type
Article
Status
Published
Authors
M. I. Shilina
  • Affiliation: M. V. Lomonosov Moscow State University
Volume/ Edition
Volume 99 / Issue number 3
Pages
392-401
Abstract
The influence of the second modifying metal (Rh) on the acid and catalytic properties of Mg/HZSM-5 in conversion of dimethyl ether to light olefins and the state of active components (Mg, Rh) on the zeolite surface are studied. It is shown that when it is introduced into Mg/HZSM-5, rhodium significantly increases stability of the catalyst operation while maintaining the selectivity for light olefins at the level of 75 wt. %. It is found that various oxocationic or oxide forms of magnesium are formed on the zeolite surface in the monometallic sample of Mg/HZSM-5, and introduction of rhodium contributes to stabilization of magnesium mainly in the form of Mg2+ cations while the strength of Lewis acid properties of magnesium cations decreases, which all together makes catalyst deactivation slow down.
Keywords
цеолит ZSM-5 модифицирование магнием и родием диметиловый эфир низшие олефины
Date of publication
12.09.2025
Year of publication
2025
Number of purchasers
0
Views
8

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