| 室温MnO_x上O_3氧化脱除空气中甲醛 |
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| 引用本文： | 赵德志,丁天英,李小松,刘景林,石川,朱爱民.室温MnO_x上O_3氧化脱除空气中甲醛[J].催化学报,2012(3):396-401. |
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| 作者姓名： | 赵德志 丁天英 李小松 刘景林 石川 朱爱民 |
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| 作者单位： | 大连理工大学等离子体物理化学实验室;大连理工大学机械工程学院 |
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| 基金项目： | 国家自然科学基金(11079013);国家高技术研究发展计划(863计划,2007AA06Z311)~~ |
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| 摘 要： | 采用氧化还原法制备了MnOx催化剂,X射线衍射结果表明其主要为无定形结构.在甲醛和臭氧浓度分别为137和642mg/m3,相对湿度为56%(25oC),GHSV为2×105h-1条件下,MnOx催化剂上O3可将甲醛全部氧化为CO2,反应150min内甲醛转化率和CO2选择性一直保持在～100%.另外,当臭氧与甲醛的摩尔比约为2:3,即显著低于化学计量比时,CO2选择性仍可达～100%.采用傅里叶变换红外光谱仪在线分析了甲醛氧化反应产物,未检测到任何副产物,从而确认了MnOx催化剂上O3对甲醛的完全氧化.
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| 关 键 词： | 氧化锰催化剂 甲醛 完全氧化 臭氧 |
Ozone Catalytic Oxidation of HCHO in Air over MnO_x at Room Temperature |
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| ZHAO Dezhi,DING Tianying,LI Xiaosong,LIU Jinglin,SHI Chuan,ZHU Aimin.Ozone Catalytic Oxidation of HCHO in Air over MnO_x at Room Temperature[J].Chinese Journal of Catalysis,2012(3):396-401. |
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| Authors: | ZHAO Dezhi DING Tianying LI Xiaosong LIU Jinglin SHI Chuan ZHU Aimin |
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| Institution: | 1,* 1Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China 2School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China |
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| Abstract: | The complete oxidation of HCHO in air with O3 over MnOx catalysts at room temperature was studied. The MnOx catalysts were prepared by a redox method. The catalysts showed amorphous patterns in X-ray diffraction characterization. Formaldehyde in simulated air containing 137 mg/m3 HCHO with 56% relative humidity (RH, 25 oC) was totally oxidized to CO2 by 642 mg/m3 O3 over the MnOx catalysts at GHSV (gas hourly space velocity) = 2 × 105 h-1. The formaldehyde conversion and CO2 selectivity were maintained at ～ 100% during 150 min time-on-stream. The effect of the molar ratio of O3 to HCHO was also investigated. At a O3 to HCHO molar ratio of 2:3, which was significantly lower than the stoichiometric ratio, a CO2 selectivity of 100% was still achieved. No byproduct was detected during HCHO oxidation with O3 over the MnOx catalysts using an online Fourier transform infrared spectrometer. |
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| Keywords: | manganese oxide formaldehyde complete oxidation ozone |
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