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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
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号4期号:21页码:8113-8122
摘要Mesoporous 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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c6ta02593e
收录类别SCI
语种英语
关键词[WOS]LAYERED DOUBLE HYDROXIDES ; VOLATILE ORGANIC-COMPOUNDS ; MG-AL HYDROTALCITE ; CATALYTIC-OXIDATION ; THERMAL-DECOMPOSITION ; MANGANESE OXIDES ; MIXED OXIDES ; COORDINATION POLYMERS ; CARBON-MONOXIDE ; CO OXIDATION
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
项目资助者National Natural Science Foundation of China(21401200) ; science and technology of Chinese Academy of Sciences(XDB05050000)
WOS记录号WOS:000378102400016
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21169
专题多相复杂系统国家重点实验室
作者单位1.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
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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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