Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products
In this study, we use coal as a carbon source from Zhangjiamao and doped with different nitrogen sources for co-pyrolysis. Nitrogen-rich tar was successfully prepared, and the content and variety were also increased. From the elemental analysis, the nitrogen content of all the tars was significantly...
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2025-06-01
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| author | Peiqi Chen Gang Li Jie Shao Baoping Bai Jie Hu Xiang Han Anning Zhou Qiuhong Wang Fuxin Chen |
| author_facet | Peiqi Chen Gang Li Jie Shao Baoping Bai Jie Hu Xiang Han Anning Zhou Qiuhong Wang Fuxin Chen |
| author_sort | Peiqi Chen |
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| description | In this study, we use coal as a carbon source from Zhangjiamao and doped with different nitrogen sources for co-pyrolysis. Nitrogen-rich tar was successfully prepared, and the content and variety were also increased. From the elemental analysis, the nitrogen content of all the tars was significantly enhanced, among which the nitrogen content of the tars after co-pyrolysis with melamine was enhanced by 5.21%, and the nitrogen content of coke was enhanced by 10.87%. According to the GC/MS results, it was found that the nitrogen compounds in the tar after full pyrolysis were richer and more abundant than those in Py-GC/MS. For the free radical reaction, the reaction process is extremely rapid, and the <sup>15</sup>N substitution product after isotope labeling was successfully captured by adding <sup>15</sup>NH<sub>4</sub>Cl for isotope labeling, which can be more intuitively and accurately illustrated from the <i>m</i>/<i>z</i> change. Among them, 26 nitrogen-containing compounds were screened out, which accounted for 66.28% of the content, and they were categorized. It was found that the five-membered nitrogen heterocycles were the most abundant, accounting for 34.88%. In addition, five other nitrogen-containing compounds containing different functional groups and the tar from the co-pyrolysis of tar-rich coal were also analyzed by GC/MS, among which the tar from melamine had the highest content of nitrogen-containing compounds, with 70.48%. Finally, the functional groups of nitrogen-containing compounds were further analyzed by XPS and FTIR, and the results were consistent with those of GC/MS analysis. In this paper, nitrogen-rich tar was prepared by co-pyrolysis of tar-rich coal and nitrogen compounds. This achievement provides a valuable reference for the high-value utilization of coal tar. |
| format | Article |
| id | doaj-art-497136c90d404c0eb4c2851201e67f84 |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
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| series | Applied Sciences |
| spelling | doaj-art-497136c90d404c0eb4c2851201e67f842025-08-20T03:11:21ZengMDPI AGApplied Sciences2076-34172025-06-011511628410.3390/app15116284Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis ProductsPeiqi Chen0Gang Li1Jie Shao2Baoping Bai3Jie Hu4Xiang Han5Anning Zhou6Qiuhong Wang7Fuxin Chen8College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaChangqing Industrial Group Co., Ltd., Xi’an 710016, ChinaChangqing Industrial Group Co., Ltd., Xi’an 710016, ChinaChangqing Industrial Group Co., Ltd., Xi’an 710016, ChinaCollege of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Safety and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaIn this study, we use coal as a carbon source from Zhangjiamao and doped with different nitrogen sources for co-pyrolysis. Nitrogen-rich tar was successfully prepared, and the content and variety were also increased. From the elemental analysis, the nitrogen content of all the tars was significantly enhanced, among which the nitrogen content of the tars after co-pyrolysis with melamine was enhanced by 5.21%, and the nitrogen content of coke was enhanced by 10.87%. According to the GC/MS results, it was found that the nitrogen compounds in the tar after full pyrolysis were richer and more abundant than those in Py-GC/MS. For the free radical reaction, the reaction process is extremely rapid, and the <sup>15</sup>N substitution product after isotope labeling was successfully captured by adding <sup>15</sup>NH<sub>4</sub>Cl for isotope labeling, which can be more intuitively and accurately illustrated from the <i>m</i>/<i>z</i> change. Among them, 26 nitrogen-containing compounds were screened out, which accounted for 66.28% of the content, and they were categorized. It was found that the five-membered nitrogen heterocycles were the most abundant, accounting for 34.88%. In addition, five other nitrogen-containing compounds containing different functional groups and the tar from the co-pyrolysis of tar-rich coal were also analyzed by GC/MS, among which the tar from melamine had the highest content of nitrogen-containing compounds, with 70.48%. Finally, the functional groups of nitrogen-containing compounds were further analyzed by XPS and FTIR, and the results were consistent with those of GC/MS analysis. In this paper, nitrogen-rich tar was prepared by co-pyrolysis of tar-rich coal and nitrogen compounds. This achievement provides a valuable reference for the high-value utilization of coal tar.https://www.mdpi.com/2076-3417/15/11/6284nitrogen-containing compoundsco-pyrolysistar-rich coalnitrogen-rich tartar yield and compositionGC/MS |
| spellingShingle | Peiqi Chen Gang Li Jie Shao Baoping Bai Jie Hu Xiang Han Anning Zhou Qiuhong Wang Fuxin Chen Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products Applied Sciences nitrogen-containing compounds co-pyrolysis tar-rich coal nitrogen-rich tar tar yield and composition GC/MS |
| title | Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products |
| title_full | Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products |
| title_fullStr | Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products |
| title_full_unstemmed | Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products |
| title_short | Preparation of Nitrogen-Rich Tar by Co-Pyrolysis and Analysis of Nitrogen-Containing Compounds in Pyrolysis Products |
| title_sort | preparation of nitrogen rich tar by co pyrolysis and analysis of nitrogen containing compounds in pyrolysis products |
| topic | nitrogen-containing compounds co-pyrolysis tar-rich coal nitrogen-rich tar tar yield and composition GC/MS |
| url | https://www.mdpi.com/2076-3417/15/11/6284 |
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