Baoyong Ren, Shiyu Fang, Tiantian Zhang, Yan Sun, Erhao Gao, Jing Li, Zu-liang Wu, Jiali Zhu, Wei Wang, S. Yao
{"title":"通过 Cu-CeO2/Al2O3 与 DBD 等离子体耦合,在低温条件下同时高效去除柴油机废气中的 DPM 和 HC","authors":"Baoyong Ren, Shiyu Fang, Tiantian Zhang, Yan Sun, Erhao Gao, Jing Li, Zu-liang Wu, Jiali Zhu, Wei Wang, S. Yao","doi":"10.1088/2058-6272/ad1572","DOIUrl":null,"url":null,"abstract":"\n Diesel particulate matter (DPM) and hydrocarbons (HC) emitted from diesel engines negatively affect air quality and human health. Catalysts for oxidative removals of DPM and HC are currently used universally but the low removal efficiency at low temperatures is a problem. In this study, Cu-doped CeO2 loaded on Al2O3 coupled with plasma was used to enhance DPM and HC low-temperature oxidation. DPM and HC removals at 200 °C using the catalyst were as high as 90% with plasma, while below 30% without plasma. Operando plasma DRIFTS-MS was conducted to reveal the function mechanism of the oxygen species on DPM oxidation process. It was found that Cu-CeO2 can promote the formation of adsorbed oxygen (M+-O2\n − ) and terminal oxygen (M=O), which can react with DPM to form carbonates that are easily converted to gaseous CO2. Our results provide a practical plasma catalysis technology to obtain simultaneous removals of DPM and HC at low temperatures.","PeriodicalId":20250,"journal":{"name":"Plasma Science & Technology","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Efficient simultaneous removal of DPM and HC from diesel exhaust gas at low temperatures over Cu-CeO2/Al2O3 coupling with DBD plasma\",\"authors\":\"Baoyong Ren, Shiyu Fang, Tiantian Zhang, Yan Sun, Erhao Gao, Jing Li, Zu-liang Wu, Jiali Zhu, Wei Wang, S. Yao\",\"doi\":\"10.1088/2058-6272/ad1572\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Diesel particulate matter (DPM) and hydrocarbons (HC) emitted from diesel engines negatively affect air quality and human health. Catalysts for oxidative removals of DPM and HC are currently used universally but the low removal efficiency at low temperatures is a problem. In this study, Cu-doped CeO2 loaded on Al2O3 coupled with plasma was used to enhance DPM and HC low-temperature oxidation. DPM and HC removals at 200 °C using the catalyst were as high as 90% with plasma, while below 30% without plasma. Operando plasma DRIFTS-MS was conducted to reveal the function mechanism of the oxygen species on DPM oxidation process. It was found that Cu-CeO2 can promote the formation of adsorbed oxygen (M+-O2\\n − ) and terminal oxygen (M=O), which can react with DPM to form carbonates that are easily converted to gaseous CO2. Our results provide a practical plasma catalysis technology to obtain simultaneous removals of DPM and HC at low temperatures.\",\"PeriodicalId\":20250,\"journal\":{\"name\":\"Plasma Science & Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2023-12-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plasma Science & Technology\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.1088/2058-6272/ad1572\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, FLUIDS & PLASMAS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasma Science & Technology","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.1088/2058-6272/ad1572","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
引用次数: 0
摘要
柴油发动机排放的柴油微粒物质(DPM)和碳氢化合物(HC)对空气质量和人类健康产生了负面影响。目前,用于氧化去除 DPM 和 HC 的催化剂已被普遍使用,但在低温条件下去除效率较低是一个问题。在这项研究中,采用等离子体在 Al2O3 上负载掺铜 CeO2 来增强 DPM 和 HC 的低温氧化作用。在 200 °C 温度下,使用该催化剂的 DPM 和 HC 去除率在有等离子体的情况下高达 90%,而在无等离子体的情况下则低于 30%。为了揭示氧物种在 DPM 氧化过程中的作用机理,进行了操作等离子体 DRIFTS-MS 分析。研究发现,Cu-CeO2 能促进吸附氧(M+-O2 - )和末端氧(M=O)的形成,这些氧能与 DPM 反应生成碳酸盐,而碳酸盐很容易转化为气态 CO2。我们的研究结果提供了一种实用的等离子催化技术,可在低温下同时去除 DPM 和 HC。
Efficient simultaneous removal of DPM and HC from diesel exhaust gas at low temperatures over Cu-CeO2/Al2O3 coupling with DBD plasma
Diesel particulate matter (DPM) and hydrocarbons (HC) emitted from diesel engines negatively affect air quality and human health. Catalysts for oxidative removals of DPM and HC are currently used universally but the low removal efficiency at low temperatures is a problem. In this study, Cu-doped CeO2 loaded on Al2O3 coupled with plasma was used to enhance DPM and HC low-temperature oxidation. DPM and HC removals at 200 °C using the catalyst were as high as 90% with plasma, while below 30% without plasma. Operando plasma DRIFTS-MS was conducted to reveal the function mechanism of the oxygen species on DPM oxidation process. It was found that Cu-CeO2 can promote the formation of adsorbed oxygen (M+-O2
− ) and terminal oxygen (M=O), which can react with DPM to form carbonates that are easily converted to gaseous CO2. Our results provide a practical plasma catalysis technology to obtain simultaneous removals of DPM and HC at low temperatures.
期刊介绍:
PST assists in advancing plasma science and technology by reporting important, novel, helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field, in a timely manner.
A Publication of the Institute of Plasma Physics, Chinese Academy of Sciences and the Chinese Society of Theoretical and Applied Mechanics.