Synergistic Removal of NO and Chlorobenzene on CeO2 Catalyst in a Dielectric Barrier Discharge Reactor at Low Temperature

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-16 DOI:10.1007/s10562-025-05041-5

Ran Sun, Kunge Hou, Xingpeng Jin, Lihui Yang, Lijie Song, Chuang Ouyang, Jianyuan Hou, Yuan Yuan, Xingang Liu, Renxi Zhang

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引用次数: 0

Abstract

The development of new technologies for removal of NO and chlorobenzene in complex flue gas situations at low temperature is a complex and demanding task. Here, the synergistic removal of NO and chlorobenzene was achieved through catalysis assisted dielectric barrier discharge (DBD) mechanism under different conditions. The experimental results suggested that the increase of specific energy density (SED) and the loading of CeO₂ strengthened the treatment of NO and chlorobenzene. A higher degradation efficiency of NO and a lower production rate of NO₂ were achieved after the introduction of chlorobenzene. The removal of chlorobenzene could also be benefited from this process, and the introduction of NO promoted CO₂ selectivity of chlorobenzene. The XPS and H₂-TPR analyses confirmed that the reaction between chlorobenzene and NO occurred by the assistance of Ce³⁺/Ce⁴⁺ redox cycle as well as the consumption and regeneration of chemically adsorbed oxygen. During the reaction, the oxygen vacancies (OVs) caused by plasma etching promote the redox cycle and alleviate the catalyst poisoning caused by chloride ions (Cl⁻). Furthermore, a comprehensive analysis of the resulting byproducts revealed phenol as the most significant intermediate in chlorobenzene degradation, while acetaldehyde emerged as the major product resulting from ring-opening processes of chlorobenzene. Utilizing chlorobenzene from flue gas subtly, this method presents a more sustainable alternative for NO reduction, showing promise for addressing industrial emission challenges.

Graphical Abstract

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低温介质阻挡放电反应器在CeO2催化剂上协同去除NO和氯苯的研究

低温条件下复杂烟气中NO和氯苯脱除新技术的开发是一项复杂而艰巨的任务。在不同条件下，通过催化辅助介质阻挡放电（DBD）机理实现了NO和氯苯的协同脱除。实验结果表明，增加比能密度（SED）和CeO2的负载能加强对NO和氯苯的处理。引入氯苯后，NO的降解效率提高，NO2的产率降低。该工艺也有利于氯苯的脱除，并且NO的引入促进了氯苯对CO2的选择性。XPS和H2-TPR分析证实，氯苯与NO的反应是在Ce3+/Ce4+氧化还原循环以及化学吸附氧的消耗和再生的辅助下发生的。在反应过程中，等离子体蚀刻引起的氧空位（OVs）促进了氧化还原循环，减轻了氯离子（Cl−）对催化剂的毒害。此外，对产生的副产物的综合分析表明，苯酚是氯苯降解中最重要的中间体，而乙醛是氯苯开环过程产生的主要产物。巧妙地利用烟气中的氯苯，这种方法为减少NO提供了一种更可持续的替代方法，有望解决工业排放挑战。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.