Conversion of dimethyl ether to light olefins on Rh-Mg/HZSM-5: role of Rh as a modifier
- Authors: Batova T.I.1, Obukhova T.K.1, Kolesnichenko N.V.1, Shilina M.I.2
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Affiliations:
- A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
- M. V. Lomonosov Moscow State University
- Issue: Vol 99, No 3 (2025)
- Pages: 392–401
- Section: ХИМИЧЕСКАЯ КИНЕТИКА И КАТАЛИЗ
- Submitted: 29.05.2025
- Accepted: 29.05.2025
- Published: 29.05.2025
- URL: https://ogarev-online.ru/0044-4537/article/view/294091
- DOI: https://doi.org/10.31857/S0044453725030035
- EDN: https://elibrary.ru/EBLTLI
- ID: 294091
Cite item
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.
Full Text

About the authors
T. I. Batova
A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Author for correspondence.
Email: batova.ti@ips.ac.ru
Russian Federation, Moscow
T. K. Obukhova
A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Email: batova.ti@ips.ac.ru
Russian Federation, Moscow
N. V. Kolesnichenko
A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Email: batova.ti@ips.ac.ru
Russian Federation, Moscow
M. I. Shilina
M. V. Lomonosov Moscow State University
Email: batova.ti@ips.ac.ru
Russian Federation, Moscow
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