Simultaneous removal of 1,2-dichlorobenzene and furan over Mn–Ce–Fe oxide catalyst: Catalytic activity and product analysis

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED Journal of Rare Earths Pub Date : 2023-12-09 DOI:10.1016/j.jre.2023.12.004

Juan Qiu , Minghui Tang , Yaqi Peng , Xuanhao Guo , Shengyong Lu , Jianhua Yan

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Abstract

The Mn–Ce–Fe mixed oxide (MCFe) was prepared by co-precipitation and the catalytic performance was tested by using 1,2-dichlorobenzene (1,2-DCB) and furan as model molecules of PCDD/F. The effect of O₂ concentration, SO₂ and NO on the catalytic activity was studied. At 270 °C, the MCFe oxide catalyst presents significant simultaneous removal efficiency of 75.25% and 100% for 1,2-DCB and furan, respectively. Brunauer–Emmett–Teller (BET) method (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), H₂-temperature programmed reduction (H₂-TPR), NH₃-temperature programmed desorption (NH₃-TPD) and O₂-TPD were used to characterize the catalysts before and after the reaction. Competition tests suggest that the oxidation behavior of furan occurred prior to that of 1,2-DCB. According to the intermediate products detected by gas chromatography – mass spectrometry (GC-MS), the by-products include chlorinated hydrocarbons, long-chain hydrocarbons, ketone, etc. Possible catalytic oxidation reaction paths are proposed.

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在 Mn-Ce-Fe 氧化物催化剂上同时去除 1,2-二氯苯和呋喃：催化活性和产物分析

通过共沉淀法制备了锰-铈-铁混合氧化物（MCFe），并以 1,2-DCB 和呋喃作为多氯二苯并对二恶英和多氯二苯并呋喃的模型分子测试了其催化性能。研究了 O2 浓度、SO2 和 NO 对催化活性的影响。在 270 ℃ 下，MCFe 氧化物催化剂对 1,2-二氯苯和呋喃的同时去除率分别达到 75.25% 和 100%。在反应前后，使用了布鲁瑙尔-艾美特-泰勒（BET）法（BET）、X 射线衍射（XRD）、扫描电子显微镜（SEM）、X 射线光电子能谱（XPS）、傅立叶变换红外光谱（FT-IR）、H2-温度编程还原（H2-TPR）、NH3-温度编程解吸（NH3-TPD）和 O2-TPD，对催化剂进行了表征。竞争试验表明，呋喃的氧化行为发生在 1,2-DCB 氧化行为之前。根据气相色谱-质谱法（GC-MS）检测到的中间产物，副产物包括氯化烃、长链烃、酮等。提出了可能的催化氧化反应路径。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.