铜锰氧化物催化低浓度甲醛动力学模型研究
收稿日期: 2022-08-29
网络出版日期: 2023-06-14
基金资助
天津市教委科研计划重点项目“室内多组分共存对吸附净化VOCs的影响机理及分子模拟研究”(2017ZD16)
Study on kinetic model of low concentration formaldehyde catalyzed by copper-manganese oxide
Received date: 2022-08-29
Online published: 2023-06-14
选取典型空气净化材料铜锰氧化物（CuO/MnO2），参照ASHRAE标准搭建了测试实验系统，探究其去除低浓度甲醛的性能。并利用红外光谱（FT-IR）、扫描电镜（SEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）等方法对反应前后催化剂的理化性质及结构进行了表征。实验结果表明：CuO/MnO2催化剂在室内典型环境［25 ℃，相对湿度（RH）为50%］下，对室内甲醛典型浓度水平［（0.3~1.0）×10-6］的去除效率达到80%。CuO/MnO2去除室内甲醛的效率受浓度、温度的影响显著，其中，反应温度对甲醛分解率的影响最大，温度越高，甲醛分解率越高。室温下在较长的一段时间内（20 h），铜锰催化剂对室内甲醛典型浓度水平的去除效率能达60%，稳定性较好。挥发性有机化合物完全催化氧化机理Mars-van Krevelen（MVK）模型可以较好地描述铜锰催化剂催化氧化甲醛的反应过程。以上表明，CuO/MnO2催化剂稳定性较好，再加上可再生的性质，该催化剂在室内等常温低浓度环境下的甲醛催化氧化有着广泛的应用前景。
王志强 , 刘相成 , 张俊杰 , 金梧凤 . 铜锰氧化物催化低浓度甲醛动力学模型研究[J]. 无机盐工业, 2023 , 55(6) : 142 -150 . DOI: 10.19964/j.issn.1006-4990.2022-0515
CuO/MnO2 as a typical air purification material was selected and a test experimental system was built with reference to ASHRAE standards to investigate its performance in removing low concentrations of formaldehyde.The physical and chemical properties and structures of the catalysts before and after the reaction were also characterized by FT-IR，SEM，XRD and XPS.The experimental results showed that the efficiency of the CuO/MnO2 catalyst for the removal of indoor formaldehyde at typical concentration levels［（0.3~1.0）×10-6］ in a typical indoor environment（25 ℃，50% RH） reached 80%.The efficiency of CuO/MnO2 in removing indoor formaldehyde was significantly affected by concentration and temperature.Among them，the reaction temperature had the greatest impact on the decomposition rate of formaldehyde，and the higher the temperature，the higher the decomposition rate of formaldehyde.The copper-manganese catalyst was able to achieve 60% removal efficiency for typical indoor formaldehyde concentration levels with good stability over a longer period of time（20 h） at room temperature.The MVK model could better describe the catalytic oxidation of formaldehyde by CuO/MnO2 catalysts.The above results showed that the stability of CuO/MnO2 catalyst was good，and coupled with its regenerative nature，the catalyst had a wide application in the catalytic oxidation of formaldehyde at low concentrations and room temperature，such as indoors.
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