Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Pyrolysis of long chain hydrocarbon-based plastics via self-exothermic effects: The origin and influential factors of exothermic processes | |
Cheng, Leilei1,2,3; Zhang, Yuyuan4; Wang, Yazhuo1,2 ; Gu, Jing1,2; Yuan, Haoran1,2; Chen, Yong1,2
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| 2022-02-15 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 424Pages:12 |
| Corresponding Author | Yuan, Haoran(yuanhr@ms.giec.ac.cn) |
| Abstract | Converting plastic wastes into value-added products through energy-efficient pyrolysis is essential, and it requires lower pyrolysis temperatures and shorter processing times than that of other processes. An exothermic phenomenon was observed during the process high-pressure polyethylene pyrolysis. It was proven for the first time that the exotherm is caused by a pressure-induced phase transition, in which colossal heat release can be driven by relatively small pressures. A large temperature change (> 100 degrees C) leads to the deep cracking of polyethylene, although the set temperature is far lower than the required temperature for thermal cracking. Importantly, the heat input stops immediately when the set temperature is reached; thus, the external heating time is short. Polyethylene can be completely converted into liquid products in similar to 90 wt% yield and with a small number of gases. The self-exothermic phase transition only occurs within a certain range of material thickness, which is related to the corresponding phase behavior. In the self-exothermic pyrolysis process, with an increase in the thickness of polyethylene, the proportion of low-value olefins in oil products decreases gradually, while alkanes, isoalkanes and aromatics show an increasing trend, making the product composition closer to the fuel standard. This work provides a viable approach for plastic recycling at low pyrolysis temperatures and short external heating times with the help of a self-exothermic phase transition in the absence of a catalyst. |
| Keyword | Pyrolysis Phase transition Polyethylene Long chain hydrocarbon Exotherm |
| DOI | 10.1016/j.jhazmat.2021.127476 |
| WOS Keyword | CATALYTIC PYROLYSIS ; COLLAPSE TRANSITION ; PHASE-TRANSITIONS ; ROTATOR PHASES ; HIGH-PRESSURE ; POLYETHYLENE ; WASTE ; SPECTROSCOPY ; DEGRADATION ; POLYMERS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2018YFC1901200] ; National Natural Science Foundation of China[51976223] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0101] ; Guang-dong Province Science and Technology Planning Project[2019B110210003] |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Guang-dong Province Science and Technology Planning Project |
| WOS Subject | Engineering, Environmental ; Environmental Sciences |
| WOS ID | WOS:000719939500006 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/35265 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Yuan, Haoran |
| Affiliation | 1.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Univ Sci & Technol China, Sch Energy Sci & Engn, Hefei 230026, Peoples R China 4.Foshan Univ, Coll Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Cheng, Leilei,Zhang, Yuyuan,Wang, Yazhuo,et al. Pyrolysis of long chain hydrocarbon-based plastics via self-exothermic effects: The origin and influential factors of exothermic processes[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,424:12. |
| APA | Cheng, Leilei,Zhang, Yuyuan,Wang, Yazhuo,Gu, Jing,Yuan, Haoran,&Chen, Yong.(2022).Pyrolysis of long chain hydrocarbon-based plastics via self-exothermic effects: The origin and influential factors of exothermic processes.JOURNAL OF HAZARDOUS MATERIALS,424,12. |
| MLA | Cheng, Leilei,et al."Pyrolysis of long chain hydrocarbon-based plastics via self-exothermic effects: The origin and influential factors of exothermic processes".JOURNAL OF HAZARDOUS MATERIALS 424(2022):12. |
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