| Formation behavior of PAHs during pyrolysis of waste tires | |
Ye, Wenwen; Xu, Xu; Zhan, Mingxiu; Huang, Qunxing; Li, Xiaodong; Jiao, Wentao ; Yin, Yongguang
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| 2022-08-05 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 435Issue:0Pages:128997 |
| Abstract | Polycyclic aromatic hydrocarbons (PAHs) formation from the pyrolysis of waste tires is inevitable because of the complexity of tire formulations and the addition of certain chemicals. In this study, the formation behavior and distribution of PAHs in three-phases were investigated from waste tires under pyrolysis conditions. The influencing factors including the temperature, heating rate, holding time, particle size, catalyzer, and atmosphere, were systematically evaluated. The results showed that PAHs were mainly concentrated in pyrolysis oil (94.59-99.03%), followed by the gas phase (0.96-5.34%), and their content was very low in the solid phase (0.01-0.99%). A higher temperature and slower heating rate lead to partial PAHs decomposition, thus reducing their emissions. The overall formation of PAHs can be inhibited when pyrolyzing coarse-grained tire powder. Furthermore, the PAHs formation mechanisms in waste tires were determined through reaction molecular dynamics, electron paramagnetic resonance, and intermediate products. Tires were mainly decomposed into benzene series, *C2H3, and *CH3; therefore, it was determined that PAHs were formed by the joint action of the hydrogen abstraction, and vinyl radical addition and methyl addition cyclization mechanisms. Among them, low and middle-ring PAHs were formed more easily, particularly naphthalene. The generation of PAHs can be inhibited by reducing the concentration of hydrocarbons and monocyclic benzene series. Regarding the distribution law and generation pathways of PAHs, our results provide guidance for reducing PAHs formation and emissions. |
| Department | 环境纳米技术与健康效应重点实验室; ; 环境纳米技术与健康效应重点实验室; |
| Keyword | POLYCYCLIC AROMATIC-HYDROCARBONS CATALYTIC FAST PYROLYSIS FORMATION MECHANISM ORGANIC-COMPOUNDS SEWAGE-SLUDGE TG-FTIR BIO-OIL TEMPERATURE DEGRADATION PRODUCTS |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47656 |
| Collection | 环境纳米技术与健康效应重点实验室 |
| Corresponding Author | Zhan, Mingxiu |
| Affiliation | 1.China Jiliang Univ, Coll Metrol & Measurement Engn, Hangzhou 310018, Zhejiang, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Haidian Dist, Beijing 100085, Peoples R China 3.Zhejiang Univ, Inst Thermal Power Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310058, Peoples R China |
| Recommended Citation GB/T 7714 | Ye, Wenwen,Xu, Xu,Zhan, Mingxiu,et al. Formation behavior of PAHs during pyrolysis of waste tires[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,435(0):128997. |
| APA | Ye, Wenwen.,Xu, Xu.,Zhan, Mingxiu.,Huang, Qunxing.,Li, Xiaodong.,...&Yin, Yongguang.(2022).Formation behavior of PAHs during pyrolysis of waste tires.JOURNAL OF HAZARDOUS MATERIALS,435(0),128997. |
| MLA | Ye, Wenwen,et al."Formation behavior of PAHs during pyrolysis of waste tires".JOURNAL OF HAZARDOUS MATERIALS 435.0(2022):128997. |
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| Formation behavior o（6226KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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