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- Title
Stabilizing the framework of SAPO-34 zeolite toward long-term methanol-to-olefins conversion.
- Authors
Yang, Liu; Wang, Chang; Zhang, Lina; Dai, Weili; Chu, Yueying; Xu, Jun; Wu, Guangjun; Gao, Mingbin; Liu, Wenjuan; Xu, Zhaochao; Wang, Pengfei; Guan, Naijia; Dyballa, Michael; Ye, Mao; Deng, Feng; Fan, Weibin; Li, Landong
- Abstract
As a commercial MTO catalyst, SAPO-34 zeolite exhibits excellent recyclability probably due to its intrinsic good hydrothermal stability. However, the structural dynamic changes of SAPO-34 catalyst induced by hydrocarbon pool (HP) species and the water formed during the MTO conversion as well as its long-term stability after continuous regenerations are rarely investigated and poorly understood. Herein, the dynamic changes of SAPO-34 framework during the MTO conversion were identified by 1D 27Al, 31P MAS NMR, and 2D 31P-27Al HETCOR NMR spectroscopy. The breakage of T-O-T bonds in SAPO-34 catalyst during long-term continuous regenerations in the MTO conversion could be efficiently suppressed by pre-coking. The combination of catalyst pre-coking and water co-feeding is established to be an efficient strategy to promote the catalytic efficiency and long-term stability of SAPO-34 catalysts in the commercial MTO processes, also sheds light on the development of other high stable zeolite catalyst in the commercial catalysis. Stability of zeolite catalysts is a highly desirable property for commercial methanol to olefins conversion but extremely challenging to achieve. Here, the authors combine the catalyst pre-coking and water co-feeding to develop an efficient strategy to enhance the long-term stability of SAPO-34 catalyst.
- Subjects
ZEOLITE catalysts; CATALYST supports; NUCLEAR magnetic resonance spectroscopy; COMMERCIAL real estate; CATALYSIS; ALKENES
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-24403-2