钙钛矿氧载体与富铁污泥灰协同作用的晶格氧释放特性。

IF 7.1 2区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Kun Wang , Wenzheng Liang , Sheng Yao , Xiaoying Yuan , Min Xie , Cuiping Wang
{"title":"钙钛矿氧载体与富铁污泥灰协同作用的晶格氧释放特性。","authors":"Kun Wang ,&nbsp;Wenzheng Liang ,&nbsp;Sheng Yao ,&nbsp;Xiaoying Yuan ,&nbsp;Min Xie ,&nbsp;Cuiping Wang","doi":"10.1016/j.wasman.2025.115098","DOIUrl":null,"url":null,"abstract":"<div><div>Given that both sludge ash and iron-based oxygen carriers (OCs) are rich in the active component Fe<sub>2</sub>O<sub>3</sub>, it is necessary to investigate whether there exists a synergistic effect that enhances oxygen transport and stabilizes OCs. This work focuses on lattice oxygen release characteristics and reduction kinetics of industrially prepared CaMn<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3-δ</sub> perovskite OCs (POC), sewage sludge ash (SSA), and their 1:1 mixture (POC/SSA) using thermogravimetric analysis (TGA) via varying hydrogen concentrations (5–25 %) and terminal temperatures (800–900 °C). The results reveal that the presence of SSA slightly delays the oxygen uncoupling process of POC, with the actual weight loss being slightly higher than the theoretical weighted value. This difference diminishes as terminal temperature increases. Notably, POC/SSA exhibits significant synergistic effects under low temperatures and highly reducing atmospheres, particularly at 25 % H<sub>2</sub> and 800 °C, where the actual weight loss (14.52 %) exceeds the theoretical value (12.96 %). The activation energy (<em>E</em><sub>a</sub>) of the reduction for the mixed sample is 46.135 kJ/mol, which is 1.973 kJ/mol lower than the theoretical weighted value, indicating a positive synergistic effect. This is attributed to the optimization of oxygen migration pathways via interfacial active sites and lattice defects, thereby enhancing the reactivity of POC. Furthermore, the SSA in synergy significantly increases the specific surface area of POC (from 14.28 m<sup>2</sup>/g to 137.6 m<sup>2</sup>/g) and pore volume, further improving reaction performance. This study provides valuable insights into the application of chemical looping technology for sludge treatment.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"207 ","pages":"Article 115098"},"PeriodicalIF":7.1000,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Lattice oxygen release characteristics of perovskite oxygen carriers synergized with iron-rich sludge ash\",\"authors\":\"Kun Wang ,&nbsp;Wenzheng Liang ,&nbsp;Sheng Yao ,&nbsp;Xiaoying Yuan ,&nbsp;Min Xie ,&nbsp;Cuiping Wang\",\"doi\":\"10.1016/j.wasman.2025.115098\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Given that both sludge ash and iron-based oxygen carriers (OCs) are rich in the active component Fe<sub>2</sub>O<sub>3</sub>, it is necessary to investigate whether there exists a synergistic effect that enhances oxygen transport and stabilizes OCs. This work focuses on lattice oxygen release characteristics and reduction kinetics of industrially prepared CaMn<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>3-δ</sub> perovskite OCs (POC), sewage sludge ash (SSA), and their 1:1 mixture (POC/SSA) using thermogravimetric analysis (TGA) via varying hydrogen concentrations (5–25 %) and terminal temperatures (800–900 °C). The results reveal that the presence of SSA slightly delays the oxygen uncoupling process of POC, with the actual weight loss being slightly higher than the theoretical weighted value. This difference diminishes as terminal temperature increases. Notably, POC/SSA exhibits significant synergistic effects under low temperatures and highly reducing atmospheres, particularly at 25 % H<sub>2</sub> and 800 °C, where the actual weight loss (14.52 %) exceeds the theoretical value (12.96 %). The activation energy (<em>E</em><sub>a</sub>) of the reduction for the mixed sample is 46.135 kJ/mol, which is 1.973 kJ/mol lower than the theoretical weighted value, indicating a positive synergistic effect. This is attributed to the optimization of oxygen migration pathways via interfacial active sites and lattice defects, thereby enhancing the reactivity of POC. Furthermore, the SSA in synergy significantly increases the specific surface area of POC (from 14.28 m<sup>2</sup>/g to 137.6 m<sup>2</sup>/g) and pore volume, further improving reaction performance. This study provides valuable insights into the application of chemical looping technology for sludge treatment.</div></div>\",\"PeriodicalId\":23969,\"journal\":{\"name\":\"Waste management\",\"volume\":\"207 \",\"pages\":\"Article 115098\"},\"PeriodicalIF\":7.1000,\"publicationDate\":\"2025-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Waste management\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0956053X25005094\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Waste management","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0956053X25005094","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0

摘要

考虑到污泥灰和铁基氧载体(OCs)都富含活性组分Fe2O3,有必要研究是否存在促进氧运输和稳定OCs的协同效应。本文主要研究了工业制备的CaMn0.5Fe0.5O3-δ钙钛矿OCs (POC)、污水污泥灰(SSA)及其1:1混合物(POC/SSA)在不同氢浓度(5- 25%)和终端温度(800-900℃)下的晶格氧释放特性和还原动力学。结果表明,SSA的存在略微延缓了POC的氧解耦过程,实际失重量略高于理论加权值。这种差异随着终端温度的升高而减小。值得注意的是,在低温和高还原气氛下,POC/SSA表现出显著的协同效应,特别是在25% H2和800℃时,实际失重(14.52%)超过理论值(12.96%)。混合样品的还原活化能(Ea)为46.135 kJ/mol,比理论加权值低1.973 kJ/mol,显示出正的协同效应。这是由于优化了氧通过界面活性位点和晶格缺陷的迁移路径,从而提高了POC的反应性。此外,协同作用下的SSA显著增加了POC的比表面积(从14.28 m2/g增加到137.6 m2/g)和孔体积,进一步提高了反应性能。本研究为化学环技术在污泥处理中的应用提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Lattice oxygen release characteristics of perovskite oxygen carriers synergized with iron-rich sludge ash
Given that both sludge ash and iron-based oxygen carriers (OCs) are rich in the active component Fe2O3, it is necessary to investigate whether there exists a synergistic effect that enhances oxygen transport and stabilizes OCs. This work focuses on lattice oxygen release characteristics and reduction kinetics of industrially prepared CaMn0.5Fe0.5O3-δ perovskite OCs (POC), sewage sludge ash (SSA), and their 1:1 mixture (POC/SSA) using thermogravimetric analysis (TGA) via varying hydrogen concentrations (5–25 %) and terminal temperatures (800–900 °C). The results reveal that the presence of SSA slightly delays the oxygen uncoupling process of POC, with the actual weight loss being slightly higher than the theoretical weighted value. This difference diminishes as terminal temperature increases. Notably, POC/SSA exhibits significant synergistic effects under low temperatures and highly reducing atmospheres, particularly at 25 % H2 and 800 °C, where the actual weight loss (14.52 %) exceeds the theoretical value (12.96 %). The activation energy (Ea) of the reduction for the mixed sample is 46.135 kJ/mol, which is 1.973 kJ/mol lower than the theoretical weighted value, indicating a positive synergistic effect. This is attributed to the optimization of oxygen migration pathways via interfacial active sites and lattice defects, thereby enhancing the reactivity of POC. Furthermore, the SSA in synergy significantly increases the specific surface area of POC (from 14.28 m2/g to 137.6 m2/g) and pore volume, further improving reaction performance. This study provides valuable insights into the application of chemical looping technology for sludge treatment.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Waste management
Waste management 环境科学-工程:环境
CiteScore
15.60
自引率
6.20%
发文量
492
审稿时长
39 days
期刊介绍: Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信