Catalytic Pyrolysis of Waste Polyethylene Using Combined CaO and Ga/ZSM-5 Catalysts for High Value-Added Aromatics Production
文献类型：期刊论文
| 作者 | Fu, Linchen2; Xiong, Qingang1; Wang, Qinhui4; Cai, Li2; Chen, Zhaohui3; Zhou, Yefeng2 |
| 刊名 | ACS Sustainable Chemistry and Engineering
 |
| 出版日期 | 2022-07-25 |
| 卷号 | 10期号:29页码:9612-9623 |
| 关键词 | Aromatic hydrocarbons - Aromatization - Catalysts - Elastomers - Gallium compounds - Plastic recycling - Pyrolysis - Waste treatment |
| DOI | 10.1021/acssuschemeng.2c02881 |
| 英文摘要 | Amidst the global focus on recycling and treatment of waste plastics for resource sustainability, it is a huge challenge to convert waste plastics into aromatics, especially high value-Added monocyclic aromatic hydrocarbons (MAHs). In this work, catalytic pyrolysis experiments of linear low-density polyethylene (LLDPE) indicated that the selectivity to aromatics increased from 70.35% when using pure HZSM-5 to 94.02% with 7 wt % Ga-modified HZMS-5. Further, the cracking catalyst CaO was utilized to increase the proportion of MAHs in aromatics. Three different catalytic modes, CaO sequential with Ga/ZSM-5 mode, Ga/ZSM-5 sequential with CaO mode, and the mixed mode, were conducted for the combined catalytic pyrolysis of polyethylene. Under such three modes, the selectivities to benzene, toluene, ethylbenzene, and xylene (BTEX) were 45.18%, 52.29%, and 56.21%, respectively. MAHs were inhibited under CaO sequential with the Ga/ZSM-5 mode and facilitated under the other two modes. By contrast, the mixed mode showed the best catalytic synergistic effect involving Ga/ZSM-5 and CaO, where LLDPE pyrolytic gas was randomly and repeatedly exposed to Ga/ZSM-5 and CaO, creating more chances to form shuttle catalysis involving aromatization and cracking. The present study is expected to provide some reference value for recycling and utilizing liquid products via catalytic pyrolysis of waste plastics. 漏 2022 American Chemical Society. All rights reserved. |
| 学科主题 | Polyethylenes |
| 项目编号 | The work was supported by the National Natural Science Foundation of China (22078278 and 22178123), Hunan Natural Science Foundation for Outstanding Young Scholars (2020JJ3033), Postdoctoral Research Foundation of China (2021M690055), and State Key Laboratory of Clean Energy Utilization (ZJUCEU2021009). |
| 出版者 | American Chemical Society |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61272]  |
| 作者单位 | 1.State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou; 510640, China 2.Natl. and Loc. U. Engineering Research Centre for Chemical Process Simulation and Intensification, College of Chemical Engineering, Xiangtan University, Xiangtan; 411105, China 3.Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 4.State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou; 310027, China |
| 推荐引用方式 GB/T 7714 | Fu, Linchen,Xiong, Qingang,Wang, Qinhui,et al. Catalytic Pyrolysis of Waste Polyethylene Using Combined CaO and Ga/ZSM-5 Catalysts for High Value-Added Aromatics Production[J]. ACS Sustainable Chemistry and Engineering,2022,10(29):9612-9623. |
| APA | Fu, Linchen,Xiong, Qingang,Wang, Qinhui,Cai, Li,Chen, Zhaohui,&Zhou, Yefeng.(2022).Catalytic Pyrolysis of Waste Polyethylene Using Combined CaO and Ga/ZSM-5 Catalysts for High Value-Added Aromatics Production.ACS Sustainable Chemistry and Engineering,10(29),9612-9623. |
| MLA | Fu, Linchen,et al."Catalytic Pyrolysis of Waste Polyethylene Using Combined CaO and Ga/ZSM-5 Catalysts for High Value-Added Aromatics Production".ACS Sustainable Chemistry and Engineering 10.29(2022):9612-9623. |
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来源：过程工程研究所
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