文献类型：期刊文献

英文题名：Selective catalytic conversion of polyphenylene oxide waste into benzene and toluene for hydrogen storage via zeolite-controlled hydro-pyrolysis

作者：Shi, Bingqing[1] Li, Dongxian[1,2] Lin, Xi[1] Wang, Shule[1,3] Meng, Xianzhi[4] Jin, Yanghao[5] Wang, Jia[1,2] Jiang, Jianchun[1,2]

第一作者：Shi, Bingqing

通信作者：Wang, J[1]

机构：[1]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Longpan Rd 159, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, 16 Suojin F Village, Nanjing 210042, Peoples R China;[3]Univ Lille, Univ Liege, Univ Picardie Jules Verne, BioEcoAgro Joint Res Unit,INRAE, F-02000 Barenton Bugny, France;[4]Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA;[5]KTH Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

年份：2026

卷号：14

期号：2

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20260319929992);Scopus(收录号：2-s2.0-105027549043);WOS:【SCI-EXPANDED(收录号:WOS:001672996600006)】；

基金：The authors express their gratitude to the following organizations for their financial support: the National Natural Science Foundation of China (Grant No. 52376195) .

语种：英文

外文关键词：Polyphenylene oxide; Benzene and toluene; Zeolite catalysis; Hydrogen storage; Plastic waste valorization

摘要：The selective conversion of plastic waste into benzene and toluene (BT) offers a promising route for producing Liquid Organic Hydrogen Carriers (LOHCs). This approach supports both carbon recycling and long-distance hydrogen storage. However, conventional catalytic pathways suffer from limited selectivity and frequent reliance on noble-metal catalysts for hydrogen-assisted deoxygenation. Here, we present a metal-free catalytic strategy that transforms Polyphenylene Oxide (PPO), an engineering thermoplastic with an aromatic-rich backbone, into high-purity BT aromatics under 0.2 MPa hydrogen pressure. A range of zeolite catalysts with varied topologies and acidities (HZSM-5, SAPO-34, USY, HSSZ-13, HZSM-11) were systematically evaluated. HZSM-5 exhibited the highest BT selectivity (>88 %) with minimal polyaromatic byproducts. Mechanistic studies reveal that moderate Br & Oslash;nsted acidity and medium-pore confinement in HZSM-5 play key roles. These features facilitate efficient ether bond cleavage and selective hydrogen-assisted Direct Deoxygenation (DDO) of methylated phenolic intermediates. Structure-activity correlations highlight the importance of pore architecture and acidity. Proper design promotes monoaromatic formation while suppressing side reactions. This work establishes a scalable, metal-free platform for converting oxygenated plastic waste into LOHC molecules. The strategy offers integrated solutions for plastic upcycling and clean hydrogen energy systems.