A stable zeolite with atomically ordered and interconnected mesopore channel

Peng Lu (), Jiaoyan Xu, Yiqing Sun, Rémy Guillet-Nicolas, Tom Willhammar, Mohammad Fahda, Eddy Dib, Bo Wang, Zhengxing Qin, Hongyi Xu, Jung Cho, Zhaopeng Liu, Haijun Yu, Xiaobo Yang, Qiaolin Lang, Svetlana Mintova, Xiaodong Zou and Valentin Valtchev ()
Additional contact information
Peng Lu: Chinese Academy of Sciences
Jiaoyan Xu: Stockholm University
Yiqing Sun: Chinese Academy of Sciences
Rémy Guillet-Nicolas: Normandie University, ENSICAEN, UNICAEN, CNRS
Tom Willhammar: Stockholm University
Mohammad Fahda: Normandie University, ENSICAEN, UNICAEN, CNRS
Eddy Dib: Normandie University, ENSICAEN, UNICAEN, CNRS
Bo Wang: China University of Petroleum (East China)
Zhengxing Qin: China University of Petroleum (East China)
Hongyi Xu: Stockholm University
Jung Cho: Stockholm University
Zhaopeng Liu: Chinese Academy of Sciences
Haijun Yu: Chinese Academy of Sciences
Xiaobo Yang: Chinese Academy of Sciences
Qiaolin Lang: Chinese Academy of Sciences
Svetlana Mintova: Normandie University, ENSICAEN, UNICAEN, CNRS
Xiaodong Zou: Stockholm University
Valentin Valtchev: Normandie University, ENSICAEN, UNICAEN, CNRS

Nature, 2024, vol. 636, issue 8042, 368-373

Abstract: Abstract Zeolites are crystalline microporous materials constructed by corner-sharing tetrahedra (SiO4 and AlO4), with many industrial applications as ion exchangers, adsorbents and heterogeneous catalysts1–4. However, the presence of micropores impedes the use of zeolites in areas dealing with bulky substrates. Introducing extrinsic mesopores, that is, intercrystal/intracrystal mesopores, in zeolites is a solution to overcome the diffusion barrier5–8. Still, those extrinsic mesopores are generally disordered and non-uniform; moreover, acidity and crystallinity are always, to some extent, impaired9. Thus, synthesizing thermally stable zeolites with intrinsic mesopores that are of uniform size and crystallographically connected with micropores, denoted here as intrinsic mesoporous zeolite, is highly desired but still not achieved. Here we report ZMQ-1 (Zeolitic Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, no. 1), an aluminosilicate zeolite with an intersecting intrinsic meso-microporous channel system delimited by 28 × 10 × 10-rings, in which the 28-ring has a free diameter of 22.76 Å × 11.83 Å, which reaches the mesopore domain. ZMQ-1 has high thermal and hydrothermal stability with tunable framework Si/Al molar ratios. ZMQ-1 is the first aluminosilicate zeolite with an intrinsic meso-microporous channel system. The Brønsted acidity of ZMQ-1 imparts high activity and unique selectivity in the catalytic cracking of heavy oil. The position of the organic structure-directing agent (OSDA) used for ZMQ-1 synthesis was determined from three-dimensional electron diffraction (3D ED) data, which shows the unique structure-directing role of the OSDA in the formation of the intrinsic meso-microporous zeolite. This provides an incentive for preparing other stable mesopore-containing zeolites.

Date: 2024
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DOI: 10.1038/s41586-024-08206-1

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