新型Mn-Cr-Zr催化剂的制备及对氯苯催化燃烧性能研究

周强; 袁峤森; 朱鹏飞; 石伟江; 李娜; 胡朝霞; 陈守文

doi:10.13205/j.hjgc.202510028

新型Mn-Cr-Zr催化剂的制备及对氯苯催化燃烧性能研究

doi: 10.13205/j.hjgc.202510028

1. 南京市栖霞生态环境监测监控中心, 南京 210038;
2. 南京理工大学环境与生物工程学院, 南京 210094

详细信息

作者简介:
周强（1989—），男，工程师，主要研究方向环境工程材料。773628409@qq.com

通讯作者:
陈守文（1966—），男，教授，主要研究方向为环境功能材料。chensw@njust.edu.cn

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出版历程
- 收稿日期: 2024-07-30
- 录用日期: 2024-09-26
- 修回日期: 2024-08-25
- 网络出版日期: 2025-12-03
- 刊出日期: 2025-10-01

Preparation of a novel series of Mn-Cr-Zr catalysts and their catalytic combustion performance for chlorobenzene

1. Nanjing Qixia District Ecological Environment Monitoring Center, Nanjing 210038, China;
2. School of Environmental & Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China

摘要

摘要: 工业生产以及垃圾焚烧过程中常常会产生高度有害的含氯挥发性有机污染物（CVOCs）。催化燃烧法是CVOCs的主要处理工艺之一，其中催化剂中毒一直是难以解决的瓶颈问题。以氯苯类CVOCs为研究对象，利用Zr基金属有机骨架（UiO-66）为载体，通过湿式浸渍法制备出新型Mn-Cr-Zr催化剂。研究了催化剂的氯苯催化燃烧反应性能及构效关系。通过XRD、SEM及N₂吸/脱附测试对催化剂的结构、形貌进行了表征，利用XPS表征了催化中心的外层电子结构，利用NH₃-TPD和H₂-TPR评估了催化剂的表面酸性和氧化还原性能。结果表明：新型催化剂有效地解决了Mn基和Cr基催化剂催化氧化CVOCs过程中多氯副产物生成的问题。40Mn7Cr3-Zr催化剂表现了最好的催化燃烧活性，在气时空速为20000 mL/（g·h）、氯苯浓度为1000 mg/m³时，293 ℃下可使氯苯的转化率达到90%；在300 ℃的长期稳定性测试中，发现氯苯可完全转化为CO₂，产物中无CO及多氯副产物生成，表明催化剂良好的催化性能。
- 挥发性有机污染物 /
- 催化剂 /
- 氧化 /
- 复合材料 /
- 氯苯 /
- UiO-66
Abstract: Highly harmful chlorinated volatile organic pollutants （CVOCs） are often generated during industrial production and waste incineration processes. The catalyst poisoning in the catalytic combustion treatment process of CVOCs has always been a bottleneck problem. Taking chlorobenzene-based CVOCs as the research object， a novel series of Mn-Cr-Zr catalysts were prepared by wet impregnation using Zr-based metal organic framework （UiO-66） as a carrier. The catalytic combustion performance of chlorobenzene and the catalytic structure-activity relationship of the catalyst were investigated in detail. The structure and morphology of the catalyst were characterized and analyzed by XRD， SEM， N₂ adsorption-desorption isotherms， and XPS. The surface acidity and redox performance of the catalyst were evaluated by NH₃-TPD and H₂-TPR. The prepared catalysts effectively solved the problem of generating multiple chlorine by-products during the catalytic oxidation of CVOCs using Mn-based and Cr-based catalysts. The results showed that the catalytic combustion activity of catalyst 40Mn7Cr3-Zr was the best. When the space velocity was 20000 mL/（g·h） and the concentration of chlorobenzene was 1000 mg/m³， the conversion of chlorobenzene reached 90% at 293 ℃. In the long-term stability test at 300 ℃， chlorobenzene was completely converted to CO₂， and there was no CO and polychlorinated by-products detected in the product， indicating its good catalytic performance.
- volatile organic compounds /
- catalyst /
- oxidation /
- composites /
- chlorobenzene /
- UiO-66

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