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学科主题: 物理化学
题名: The effects of alkali metal on structure of manganese oxide supported on SBA-15 for application in the toluene catalytic oxidation
作者: Qu, Zhenping1;  Bu, Yibin1;  Qin, Yuan1;  Wang, Yi1;  Fu, Qiang2
通讯作者: ZhenpingQu
关键词: Toluene ;  Mn/SBA-15 ;  K ;  FTIR ;  Adsorption sites
刊名: CHEMICAL ENGINEERING JOURNAL
发表日期: 2012-10-15
DOI: 10.1016/j.cej.2012.07.138
卷: 209, 页:163-169
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 2,5
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: The effects of alkali metal on the toluene catalytic oxidation were studied over the manganese oxide supported on SBA-15. Their properties were characterized by temperature programmed reduction (TPR), X-ray diffraction (XRD), diffuse reflectance spectra (DRS) and Fourier transform infrared (FTIR) techniques. It was found that the K/Mn molar ratios over the range of 0.1/1-0.3/1 greatly influenced the structure of the catalyst and the activity for toluene oxidation. When the K/Mn molar ratio was lower than 0.125/1, it led to a decrease in the dispersion of metal oxide particles and the reducibility, resulting in low reactivity for toluene oxidation. Increasing the K/Mn molar ratios to 0.15/1-0.18/1 resulted in the transformation of parts of MnO2 into Mn2O3, and accompanying with the high dispersion of metal oxides and better reducibility. The catalytic activity was obviously increased when the K/Mn molar ratio was 0.15/1-0.18/1. The reactivity of the sample with K/Mn above 0.18/1, however, declined sharply due to the blocking of active sites by K. Two important adsorption sites existed on the KMn/SBA-15 system, in which one was isolated OH groups on the SBA-15 and the other was the activated Si-O-Mn bond under the effect of K. (C) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: VOLATILE ORGANIC-COMPOUNDS ;  MESOPOROUS SILICAS ;  MCM-41 MATERIALS ;  COMBUSTION ;  ADDITIVES ;  TEMPERATURE ;  ADSORPTION ;  REDUCTION ;  ETHANOL ;  VOCS
语种: 英语
WOS记录号: WOS:000311190500021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118003
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Dalian 116024, Peoples R China
2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Qu, Zhenping,Bu, Yibin,Qin, Yuan,et al. The effects of alkali metal on structure of manganese oxide supported on SBA-15 for application in the toluene catalytic oxidation[J]. CHEMICAL ENGINEERING JOURNAL,2012,209:163-169.
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