Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method
文献类型：期刊论文
| 作者 | Tang, Wenxiang1,3; Wu, Xiaofeng1; Li, Dongyan1,3; Wang, Zhen2; Liu, Gang1,3; Liu, Haidi1; Chen, Yunfa1
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| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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| 出版日期 | 2014 |
| 卷号 | 2期号:8页码:2544-2554 |
| 关键词 | volatile organic-compounds benzene combustion lattice oxygen air-pollution ethyl-acetate co oxidation gas-phase toluene removal mnox |
| ISSN号 | 2050-7488 |
| 其他题名 | J. Mater. Chem. A |
| 中文摘要 | A novel template-free oxalate route was applied to synthesize mesoporous manganese oxides with high surface area (355 m(2) g(-1)) and well-defined mesopores which can be obtained in large quantities. The physicochemical properties of the materials were characterized by means of TG, XRD, SEM, TEM, H-2-TPR and XPS techniques. All catalysts were tested on catalytic deep oxidation of benzene, and the effects of calcination temperature on the features of catalyst structure and catalytic activity were investigated. Manganese oxides prepared by oxalate route exhibited better catalytic activities for complete oxidation of benzene, toluene and o-xylene as compared with related manganese oxides prepared by other different methods (NaOH route, NH4HCO3 route and nanocasting strategy), and especially the temperature for benzene conversion of 90% on the oxalate-derived manganese oxide catalysts was 209 degrees C, which is 132 degrees C lower than required for the catalyst prepared by NaOH route. The catalytic performance of manganese oxide is correlated with surface area, pore size, low-temperature reducibility and distribution of surface species. The mole ratio of Mn4+/Mn2+ on the samples which performed with better catalytic activity was close to 1.0. This is good for the redox process of Mn4+ <-> Mn3+ <-> Mn2+ which is the key factor in determining the activity on MnOx, further indicating that the oxalate route is good for keeping the distribution of manganese oxidation states at an appropriate degree. A possible process of VOCs' complete oxidation on manganese oxide catalysts is discussed. In addition, the best catalyst was highly stable with prolonged time on stream and was resistant to water vapor. |
| 英文摘要 | A novel template-free oxalate route was applied to synthesize mesoporous manganese oxides with high surface area (355 m(2) g(-1)) and well-defined mesopores which can be obtained in large quantities. The physicochemical properties of the materials were characterized by means of TG, XRD, SEM, TEM, H-2-TPR and XPS techniques. All catalysts were tested on catalytic deep oxidation of benzene, and the effects of calcination temperature on the features of catalyst structure and catalytic activity were investigated. Manganese oxides prepared by oxalate route exhibited better catalytic activities for complete oxidation of benzene, toluene and o-xylene as compared with related manganese oxides prepared by other different methods (NaOH route, NH4HCO3 route and nanocasting strategy), and especially the temperature for benzene conversion of 90% on the oxalate-derived manganese oxide catalysts was 209 degrees C, which is 132 degrees C lower than required for the catalyst prepared by NaOH route. The catalytic performance of manganese oxide is correlated with surface area, pore size, low-temperature reducibility and distribution of surface species. The mole ratio of Mn4+/Mn2+ on the samples which performed with better catalytic activity was close to 1.0. This is good for the redox process of Mn4+ <-> Mn3+ <-> Mn2+ which is the key factor in determining the activity on MnOx, further indicating that the oxalate route is good for keeping the distribution of manganese oxidation states at an appropriate degree. A possible process of VOCs' complete oxidation on manganese oxide catalysts is discussed. In addition, the best catalyst was highly stable with prolonged time on stream and was resistant to water vapor. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Energy & Fuels ; Materials Science |
| 关键词[WOS] | VOLATILE ORGANIC-COMPOUNDS ; BENZENE COMBUSTION ; LATTICE OXYGEN ; AIR-POLLUTION ; ETHYL-ACETATE ; CO OXIDATION ; GAS-PHASE ; TOLUENE ; REMOVAL ; MNOX |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000331247500014 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8157]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China 2.Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Wenxiang,Wu, Xiaofeng,Li, Dongyan,et al. Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(8):2544-2554. |
| APA | Tang, Wenxiang.,Wu, Xiaofeng.,Li, Dongyan.,Wang, Zhen.,Liu, Gang.,...&Chen, Yunfa.(2014).Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method.JOURNAL OF MATERIALS CHEMISTRY A,2(8),2544-2554. |
| MLA | Tang, Wenxiang,et al."Oxalate route for promoting activity of manganese oxide catalysts in total VOCs' oxidation: effect of calcination temperature and preparation method".JOURNAL OF MATERIALS CHEMISTRY A 2.8(2014):2544-2554. |
入库方式： OAI收割
来源：过程工程研究所
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