A Six-Membered Ring Molecular Sieve Achieved by a Reconstruction Route

Jiaqi Shi; Junyi Hu; Qinming Wu; Wei Chen; Zhuoya Dong; Anmin Zheng; Yanhang Ma; Xiangju Meng; Feng-Shou Xiao

doi:10.1021/jacs.2c13309

A Six-Membered Ring Molecular Sieve Achieved by a Reconstruction Route

J Am Chem Soc. 2023 Apr 12;145(14):7712-7717. doi: 10.1021/jacs.2c13309. Epub 2023 Mar 2.

Authors

Jiaqi Shi¹, Junyi Hu², Qinming Wu¹, Wei Chen³, Zhuoya Dong², Anmin Zheng³, Yanhang Ma², Xiangju Meng¹, Feng-Shou Xiao^{1

4}

Affiliations

¹ Key Laboratory of Applied Chemistry of Zhejiang Province and Department of Chemistry and Key Laboratory of Biomass Chemical Engineering of Ministry of Education and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310028, China.
² School of Physical Science and Technology and Shanghai Key Laboratory of High-Resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China.
³ State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.
⁴ College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

PMID: 36862978
DOI: 10.1021/jacs.2c13309

Abstract

Zeolite molecular sieves with at least eight-membered rings are widely applied in industrial applications, while zeolite crystals with six-membered rings are normally regarded as useless products due to the occupancy of the organic templates and/or inorganic cation in the micropores that could not be removed. Herein, we showed that a novel six-membered ring molecular sieve (ZJM-9) with fully open micropores could be achieved by a reconstruction route. The mixed gas breakthrough experiments such as CH₃OH/H₂O, CH₄/H₂O, CO₂/H₂O, and CO/H₂O at 25 °C showed that this molecular sieve was efficient for selective dehydration. Particularly, a lower desorption temperature (95 °C) of ZJM-9 than that (250 °C) of the commercial 3A molecular sieve might offer an opportunity for saving more energy in dehydration processes.