Effects of iron oxide minerals on the pyrolysis of polyvinyl chloride: Catalytic dechlorination, chlorine capture, and carbon sequestration
文献类型：期刊论文
| 作者 | Ding, Ziyi1,4; Zhu, Runliang1,4 ; Xie, Qingru1,4; Long, Shiqin1,4; Fu, Haoyang3; Chen, Qingze1,4; Xi, Yunfei2
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| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2024-12-10 |
| 卷号 | 483页码:12 |
| 关键词 | Ferrihydrite Hematite Polyvinyl chloride Catalytic pyrolysis Dechlorination |
| ISSN号 | 0959-6526 |
| DOI | 10.1016/j.jclepro.2024.144283 |
| 英文摘要 | To reduce the risk of organochlorine contamination during the pyrolysis of chlorine-containing plastics, catalytic pyrolytic dechlorination of polyvinyl chloride (PVC) by iron oxides is a promising strategy. However, differences in the structural properties of various iron oxides mineral phases may lead to different catalysis activity. In this study, various characterization methods and theoretical calculations were integrated to reveal the effects of ferrihydrite (Fhy) and hematite (Hem) on the pyrolysis characteristics of PVC at 400-800 degrees C. Both Fhy and Hem lower the dechlorination temperature of PVC, consequently retarding the degradation of dechlorination intermediates and mitigating the emission of volatile compounds. Fhy and Hem reduced the release of chlorinated hydrocarbons and immobilized chlorine as Rokuhnite. Specifically, the yield of HCl at 400 degrees C decreased from 88.8% for pure PVC to 29.9%/55.8% with the additions of 30% Fhy/Hem. The surface catalytic activity of Hem is stronger than that of Fhy, resulting in better catalytic dechlorination; while Fhy has a larger specific surface area (more adsorption sites), which leads to better chlorine fixation. Fhy and Hem also facilitated the dehydroaromatisation reaction of dechlorinated PVC, increasing the residual carbon yield at 400 degrees C from 45.5% to 65.4% and to 75.8%, respectively. Preferably from the perspective of pollutant emission, Fhy with large specific surface area and weak crystallinity can adsorb more HCl and catalyze dechlorination as well, so the addition of Fhy (>30%) to PVC pyrolysis process can be beneficial to the control of pollutant emission and carbon sequestration. |
| WOS研究方向 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001374714700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81902]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Zhu, Runliang; Xi, Yunfei |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Queensland Univ Technol, Fac Sci, Sch Chem & Phys, Brisbane, Qld 4001, Australia 3.Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore 4.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Ziyi,Zhu, Runliang,Xie, Qingru,et al. Effects of iron oxide minerals on the pyrolysis of polyvinyl chloride: Catalytic dechlorination, chlorine capture, and carbon sequestration[J]. JOURNAL OF CLEANER PRODUCTION,2024,483:12. |
| APA | Ding, Ziyi.,Zhu, Runliang.,Xie, Qingru.,Long, Shiqin.,Fu, Haoyang.,...&Xi, Yunfei.(2024).Effects of iron oxide minerals on the pyrolysis of polyvinyl chloride: Catalytic dechlorination, chlorine capture, and carbon sequestration.JOURNAL OF CLEANER PRODUCTION,483,12. |
| MLA | Ding, Ziyi,et al."Effects of iron oxide minerals on the pyrolysis of polyvinyl chloride: Catalytic dechlorination, chlorine capture, and carbon sequestration".JOURNAL OF CLEANER PRODUCTION 483(2024):12. |
入库方式： OAI收割
来源：广州地球化学研究所
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