Mechanistic understanding of metal-acid synergetic hydroconversion of polyethylene under mild conditions over a Ru/MOR catalyst
文献类型：期刊论文
| 作者 | Chen, Ruizhe1,2,3,4; Cheng, Leilei1,2,3,4; Gu, Jing1,2,3,4; Yuan, Haoran1,2,3,4; Chen, Yong1 |
| 刊名 | ENERGY CONVERSION AND MANAGEMENT
 |
| 出版日期 | 2024-01-15 |
| 卷号 | 300页码:12 |
| 关键词 | Plastic waste Bifunctional catalysts Ru size Hydrogenolysis Hydrocracking |
| ISSN号 | 0196-8904 |
| DOI | 10.1016/j.enconman.2023.117983 |
| 通讯作者 | Yuan, Haoran(yuanhr@ms.giec.ac.cn) |
| 英文摘要 | Hydroconversion has been demonstrated as a viable method to efficiently deconstruct polyolefins under relatively mild conditions. The hydrogenolysis of C-C bonds over Ru-based catalysts can convert polyolefins into liquid alkanes and methane. To suppress methane generation and obtain high-value isomer, further exploration of the mechanism for the cooperative deconstruction of polyolefins by bifunctional catalysts with metal-acid sites is necessary. In this study, we utilized ball milling to enhance the accessibility of acid sites within MOR zeolite, while the fragmented pore structure ensured that the loaded Ru metal was sufficiently accessible for longchain alkanes. The sequential accessibility of metal-acid sites boosted the hydroconversion efficiency of lowdensity polyethylene (LDPE). Through systematic investigations involving catalysts with various Ru loadings and Si/Al ratio of zeolites, it is discovered that the smaller-sized Ru particles not only facilitate the generation and desorption of olefinic intermediates in hydrocracking but also promote the hydrogenation and desorption of alkyls and suppress the cascade of terminal C-C bond cleavage in hydrogenolysis. Liquid fuel (C5-C21) yield was increased by 27% for the catalyst loaded with 0.7 wt% Ru on mMOR20 compared to 1.7 wt% loadings, while methane yield was only one-third of the latter. Concurrently, the distribution of acid sites on the zeolite surface affected the aggregation process of Ru atoms. This study deeply unveils the synergistic interaction of metal-acid sites, facilitating internal C-C bond cleavage to obtain liquid fuel and sheds light on catalyst design for waste polyolefins upcycling. |
| WOS关键词 | HYDROCRACKING |
| 资助项目 | CAS Project for Young Scientists in Basic Research ; Guangdong Basic and Applied Basic Research Foundation ; [YSBR-044] ; [2021B1515020068] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001138505100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | CAS Project for Young Scientists in Basic Research ; Guangdong Basic and Applied Basic Research Foundation |
| 源URL | [http://ir.giec.ac.cn/handle/344007/40599]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Yuan, Haoran |
| 作者单位 | 1.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Ruizhe,Cheng, Leilei,Gu, Jing,et al. Mechanistic understanding of metal-acid synergetic hydroconversion of polyethylene under mild conditions over a Ru/MOR catalyst[J]. ENERGY CONVERSION AND MANAGEMENT,2024,300:12. |
| APA | Chen, Ruizhe,Cheng, Leilei,Gu, Jing,Yuan, Haoran,&Chen, Yong.(2024).Mechanistic understanding of metal-acid synergetic hydroconversion of polyethylene under mild conditions over a Ru/MOR catalyst.ENERGY CONVERSION AND MANAGEMENT,300,12. |
| MLA | Chen, Ruizhe,et al."Mechanistic understanding of metal-acid synergetic hydroconversion of polyethylene under mild conditions over a Ru/MOR catalyst".ENERGY CONVERSION AND MANAGEMENT 300(2024):12. |
入库方式： OAI收割
来源：广州能源研究所
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