陈金星教授及其合作者在Angew. Chem. Int. Ed.上发表论文

题目：

Ultra-Narrow Alkane Product Distribution in Polyethylene Waste Hydrocracking by Zeolite Micro-Mesopore Diffusion Optimization

作者：

Shuai Wang¹, Weichen Wang¹, Mingyu Chu², Daowei Gao¹*, Yong Wang³, Yipin Lv¹, Rongyao Wang¹, Lianghao Song⁴, Huaiqing Zhao¹, Jinxing Chen²*, Guozhu Chen¹*

单位：

¹School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China.

²Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, P. R. China.

³Department of Mechanical and Industrial Engineering, University of Toronto, Toronto M5S 3G8, Canada.

⁴Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea.

摘要：

Plastic pollution poses a pressing environmental challenge in modern society. Chemical catalytic conversion has emerged as a promising solution for upgrading waste plastics into valuable liquid alkanes and other high value products. However, the current methods yield mixed products with a wide carbon distribution. To address this challenge, we present a bifunctional catalytic system consisting of β zeolite mixed hierarchical Pt@Hie-TS-1, designed for the conversion of low-density polyethylene (LDPE) into liquid alkanes. This system achieves a 94.0% yield of liquid alkane, with 84.8% of C5-C7 light alkanes. Combined with in situ FTIR and molecular dynamics simulation, the shape-selective mechanisms is elucidated, which ensures that only olefins of the appropriate size can diffuse to the encapsulated Pt sites within the zeolite for hydrogenation, resulting in an ultra-narrow product distribution. Furthermore, by optimizing the micro-mesopores of Pt@Hie-TS-1, the scaling relationship between the pore structure and the conversion/selectivity is identified. The rapid diffusion of olefins within these micro-mesopores significantly enhances the catalytic efficiency. Our findings contribute to the design of efficient catalysts for plastic waste valorization.

影响因子：

16.1

分区情况：

一区

链接：

https://doi.org/10.1002/anie.202409288

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