浙江大学肖丰收教授带领的研究团队通过一种重构途径制备了六元环分子筛。这一研究成果于2023年3月2日发表在国际顶尖学术期刊《美国化学会杂志》上。

在该研究中，团队展示了通过一种重构途径可以制备一种新型的、具有完全开放微孔的六元环分子筛（ZJM-9）。25℃下的CH₃OH/H₂O、CH₄/H₂O、CO₂/H₂O、CO/H₂O等混合气体突破实验表明，该分子筛具有较好的选择性脱水效果。特别是，ZJM-9的解吸温度（95°C）比商用3A分子筛的解吸温度（250°C）更低，可能提供了在脱水过程中节省更多能量的机会。

据了解，具有至少八元环的沸石分子筛被广泛应用于工业应用，而六元环的沸石晶体因为有机模板和/或无机阳离子占据在微孔中无法被去除，之前通常被认为是无用的产品。

附：英文原文

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

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

Issue&Volume: March 2, 2023

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.

DOI: 10.1021/jacs.2c13309

Source: https://pubs.acs.org/doi/10.1021/jacs.2c13309