Post-synthetic improvement of H-ZSM-22 zeolites for the methanol-to-olefin conversion
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- 作者：Michael Dyballaa ; Utz Obenausa ; Melanie Rosenbergera ; Achim Fischerb ; Harald Jakobb ; Elias Klemma ; Michael Hungera ; michael.hunger@itc.uni-stuttgart.de" class="auth_mail" title="E-mail the corresponding author
- 关键词：Zeolite ZSM-22 ; Framework desilication ; Mesopores ; Brø ; nsted acid sites ; Methanol-to-olefin conversion
- 刊名：Microporous and Mesoporous Materials
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：233
- 期：Complete
- 页码：26-30
- 全文大小：925 K
文摘
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Desilication of ZSM-22 doubles the lifetime of these catalysts in the MTO conversion.
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Introduction of mesopores does not influence the product selectivities in the MTO conversion.
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Pore mouths catalysis on ZSM-22 has no significant impact on the MTO conversion.
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The number of Brønsted acid sites is dramatically changed upon desilication.
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An optimized acid site density is an additional reason for the improved catalytic performance of mesoporous ZSM-22.