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Excellent low temperature performance for total benzene oxidation over mesoporous CoMnAl composited oxides from hydrotalcites
Mo, Shengpeng1,2; Li, Shuangde1; Li, Wenhui1,2; Li, Jiaqi1,2; Chen, Jiayuan1,2; Chen, Yunfa1
2016-06-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume4Issue:21Pages:8113-8122
AbstractMesoporous CoMnAl mixed metal oxide catalysts with various Co/Mn atomic ratios have been obtained by calcination at 450 degrees C of layered double hydroxide (LDH) precursors prepared by the NH4OH co-precipitation-hydrothermal method without distinct MnCO3 peaks. The catalysts exhibited high efficiency for total oxidation of volatile organic compounds (VOCs). The physicochemical properties of the catalysts were characterized using several analytical techniques. Among them, CoMn2AlO shows the optimal activity and the temperature required to achieve a benzene conversion of 90% (T-90) was about 238 degrees C, with a reaction rate and activity energy (E-a) of 0.24 mmol g(cat)(-1) h(-1) and 65.77 kJ mol(-1) respectively. This temperature was 47 degrees C lower than that on the Co3AlO sample with a tower reaction rate of 0.19 mmol g(cat)(-1) h(-1) and a higher E-a 130.31 kJ mol(-1) at a high space velocity (SV = 60 000 mL g(-1) h(-1)). The effects of calcination temperature on the textural properties and catalytic activity of the CoMn2AlO catalyst were further investigated. The as-prepared CoMn2AlO-550 sample displayed superior catalytic activity, with T-90 at 208 degrees C, compared CoMn2AlO-450. The formation of a solid solution with high surface area, rich oxygen vacancies, high Mn4+/Mn3+ and Co3+/Co2+ ratios and low-temperature reducibility made a great contribution to the significant improvement of the catalytic activity.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c6ta02593e
Indexed BySCI
Language英语
WOS KeywordLAYERED DOUBLE HYDROXIDES ; VOLATILE ORGANIC-COMPOUNDS ; MG-AL HYDROTALCITE ; CATALYTIC-OXIDATION ; THERMAL-DECOMPOSITION ; MANGANESE OXIDES ; MIXED OXIDES ; COORDINATION POLYMERS ; CARBON-MONOXIDE ; CO OXIDATION
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21401200) ; science and technology of Chinese Academy of Sciences(XDB05050000)
WOS IDWOS:000378102400016
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21169
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Mo, Shengpeng,Li, Shuangde,Li, Wenhui,et al. Excellent low temperature performance for total benzene oxidation over mesoporous CoMnAl composited oxides from hydrotalcites[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(21):8113-8122.
APA Mo, Shengpeng,Li, Shuangde,Li, Wenhui,Li, Jiaqi,Chen, Jiayuan,&Chen, Yunfa.(2016).Excellent low temperature performance for total benzene oxidation over mesoporous CoMnAl composited oxides from hydrotalcites.JOURNAL OF MATERIALS CHEMISTRY A,4(21),8113-8122.
MLA Mo, Shengpeng,et al."Excellent low temperature performance for total benzene oxidation over mesoporous CoMnAl composited oxides from hydrotalcites".JOURNAL OF MATERIALS CHEMISTRY A 4.21(2016):8113-8122.
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