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Directional Construction of Active Naphthalenic Species within SAPO-34 Crystals toward More Efficient Methanol-to-Olefin Conversion by Chang Wang; Liu Yang; Mingbin Gao; Xue Shao; Weili Dai; Guangjun Wu; Naijia Guan; Zhaochao Xu; Mao Ye; Landong Li is a Chemistry article available to read on EtoBox.

What is Directional Construction of Active Naphthalenic Species within SAPO-34 Crystals toward More Efficient Methanol-to-Olefin Conversion about?

Olefin selectivity and catalyst lifetime are two key metrics for industrial methanol-to-olefin catalysts. Currently, it is very difficult to obtain high olefin selectivity and long catalyst lifetime at the same time. Herein, a feasible strategy combining precoking and steaming to directionally construct the active naphthalenic species within the crystal center of the SAPO-34 catalyst has been developed, which can not only promote the lower olefin selectivity to ∼89% (ethylene and propylene) but also prolong the catalyst lifetime by ∼3.7-fold in the methanol-to-olefin conversion. Structured illumination microscopy, ultraviolet-visible spectroscopy, and online mass spectrometry elucidate the spatiotemporal distribution and evolution of the naphthalenic species during the precoking and steaming processes. This one-stone-two-birds strategy is applicable to a commercial SAPO-34 catalyst containing a binder, demonstrating its bright prospect in the methanol-to-olefin industry.

Who reads Directional Construction of Active Naphthalenic Species within SAPO-34 Crystals toward More Efficient Methanol-to-Olefin Conversion?

Author

Chang Wang; Liu Yang; Mingbin Gao; Xue Shao; Weili Dai; Guangjun Wu; Naijia Guan; Zhaochao Xu; Mao Ye; Landong Li

Publisher

American Chemical Society (ACS)

Published

2022

Language

EN

Field

Chemistry (Physical Sciences)