Experimental investigation of n-heptane unsteady-state pyrolysis coking characteristics in microchannel
文献类型：期刊论文
| 作者 | Li, Haowen1,3; Wang, Xiaohan2,3 ; Song, Qianshi2,3; Yang, Zixin1,3; Qi, Wei2,3
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| 刊名 | JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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| 出版日期 | 2022 |
| 卷号 | 161页码:12 |
| 关键词 | n-Heptane Pyrolysis Coking Unsteady-state Coke characterization |
| ISSN号 | 0165-2370 |
| DOI | 10.1016/j.jaap.2021.105384 |
| 通讯作者 | Qi, Wei(qiwei@ms.giec.ac.cn) |
| 英文摘要 | Coke deposition is considered a challenging problem during hydrocarbon pyrolysis. To get more insights into pyrolysis coking characteristics in the regenerative cooling channels, the unsteady-state experiments of n-heptane were performed in a 2.0 mm (internal diameter) passivated STS304 tube at 873-1073 K and 1.0 MPa with a feeding flow rate of 1.0 mL/min during pyrolysis for 5-60 min. The unsteady-state and spatial coke distributions were obtained. Results showed three distinct stages of coking, namely, catalytic coking, the transition stage, and pyrolytic coking. Coke samples obtained under different temperatures were characterized by element analyzer, scanning electron microscope (SEM), thermogravimeter coupled with a Fourier transform infrared spectroscopy (TG-FTIR), X-ray diffraction (XRD), and Raman spectra apparatus. The coke could be classified into two or three types according to its oxidative activity, and was composed of aromatic carbon and aliphatic hydrocarbons. The morphology of the coke transitions from filamentous to spherical with temperature and pyrolysis time. The C/H ratio of coke increased with the temperature in the catalytic coking stage, but decreased in the pyrolytic coking stage. High H contents and extensive defects of the coke observed at high temperatures could attributed to the generation of large amounts of pyrolytic coke and high coking rate, which resulting a lower degree of dehydrogenation. The presence of metallic substances in the coke verifies the catalytic effect at the beginning of coking and indicates the occurrence of carburization corrosion. |
| WOS关键词 | ENDOTHERMIC HYDROCARBON FUEL ; THERMAL-CRACKING ; COKE DEPOSITION ; SOLID DEPOSITS ; AVIATION KEROSENE ; HEAT-TRANSFER ; JET FUEL ; FLOW ; DODECANE ; CARBON |
| 资助项目 | National Natural Science Foundation of China[51976219] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA 21060102] |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000729310900005 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.giec.ac.cn/handle/344007/35518]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Qi, Wei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Haowen,Wang, Xiaohan,Song, Qianshi,et al. Experimental investigation of n-heptane unsteady-state pyrolysis coking characteristics in microchannel[J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,2022,161:12. |
| APA | Li, Haowen,Wang, Xiaohan,Song, Qianshi,Yang, Zixin,&Qi, Wei.(2022).Experimental investigation of n-heptane unsteady-state pyrolysis coking characteristics in microchannel.JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,161,12. |
| MLA | Li, Haowen,et al."Experimental investigation of n-heptane unsteady-state pyrolysis coking characteristics in microchannel".JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 161(2022):12. |
入库方式： OAI收割
来源：广州能源研究所
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