浙江大学王勇团队在研究中取得进展。他们提出了通过耦合C-C裂解和羰基化，聚烯烃废弃物高效升级回收为轻芳烃。相关论文于2025年3月19日发表在《德国应用化学》杂志上。

研究人员提出了一种独特的策略，将传统的PE裂解-芳构化过程与费托合成的关键步骤CO插入相结合，在280°C的条件下，轻芳烃的产率提高了4倍，绝对值高达67%。在聚烯烃裂解过程中形成的ru -烷基中间体中插入CO有助于活性氧的生成，保证了理想的C-C链长度范围，并为随后在Hol-ZSM-5@S1上具有短b轴的有效芳构化铺平了道路。根据技术经济分析，与传统的石脑油裂解技术相比，这种低碳足迹和经济的方法可以减少约1/3的碳排放，并有望通过聚烯烃降解重塑全球石化行业的芳烃循环。

据了解，将废弃聚烯烃升级为轻芳烃具有巨大的潜力，可以产生数亿吨有价值的芳烃原料。然而，传统的高温自由基裂解法在沸石上芳构化聚烯烃，面临着芳构性控制和焦炭快速失活的挑战。

附：英文原文

Title: Efficient Upcycling of Polyolefin Waste to Light Aromatics via Coupling C-C Scission and Carbonylation

Author: Ruiliang Gao, Shanjun Mao, Bing Lu, Wencong Liu, Yong Wang

Issue&Volume: 2025-03-19

Abstract: The upcycling of waste polyolefins into light aromatics has great potential to generate hundreds of millions of tons of valuable aromatic carbon feedstock. However, the conventional high-temperature radical cracking method for aromatizing polyolefins on zeolites faces challenges in aromaticity control and rapid deactivation due to coke. Here, we present a unique strategy that integrates traditional cracking-aromatization process of PE with CO insertion, a key step of Fischer–Tropsch synthesis, achieving a rise of yield of light aromatics by 4 times, with an absolute value up to 67% by weight at only 280 °C. The insertion of CO into the Ru-alkyl intermediates formed during polyolefin cracking facilitates the generation of active oxygenate species, guarantees an ideal C-C chain length range, and smoothing the way for subsequent efficient aromatization on Hol-ZSM-5@S1 with a short b-axis. According to the technical economic analysis, this low-carbon-footprint and economic approach can reduce approximately 1/3 of carbon emissions compared to traditional naphtha cracking technologies, and holds promise for reshaping the global aromatic hydrocarbon cycle of petrochemical industry through polyolefin degradation.

DOI: 10.1002/anie.202424334

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202424334