Insight into the structure and molybdenum species in mesoporous molybdena-alumina catalysts for isobutane dehydrogenation | |
Department | OSSO国家重点实验室 |
Zhao HH(赵华华)1; Song HL(宋焕玲)1; Chou LJ(丑凌军)1,2; Zhao J(赵军)1; Yang J(杨建)1; Yan L(闫亮)1; Chou LJ(丑凌军) | |
The second department | 苏州研究院 |
2017 | |
Source Publication | Catalysis Science & Technology |
ISSN | 2044-4753 |
Volume | 7Issue:15Pages:3258-3267 |
Abstract | The relationship between the structure and Mo species in mesoporous molybdena–alumina catalysts and their catalytic performance for isobutane dehydrogenation has been investigated in detail. Characterization by XRD, HAADF-STEM, EDX, FT-IR, and N2 physisorption illustrated that ordered mesoporous catalysts (OM-Al, MoAl(F), and MoAl(C)) possessed an amorphous alumina phase and non-ordered mesoporous catalysts (M-Al and MoAl) exhibited a γ-Al2O3 phase. Mo species were highly dispersed over all the catalysts because Mo surface densities were about 1.0 Mo nm−2. Moreover, XPS and ICP-OES showed that Mo species were uniformly distributed over MoAl(F) with the Mo species confined in the ordered mesoporous structure. Higher dehydrogenation stability and a lower coke formation rate, albeit lower catalytic conversion, was obtained over MoAl(F) in comparison with those of MoAl(C) and MoAl on account of its stronger metal–support interaction, as shown by H2-TPR technique. The catalyst with a γ-Al2O3 phase exhibited stronger acidity and higher activity than the corresponding catalyst with an amorphous phase. The acidity of the catalysts was greatly enhanced by the addition of Mo species, according to the NH3-TPD characterization. However, not all the acid sites were active sites for dehydrogenation activity. The moderately and strongly acidic sites and the Mo species, including Mo6+ and lower valence Mo species, probably contributed to the dehydrogenation reactivity. Moreover, deactivation of the catalysts was mainly due to coke formation over the spent catalysts. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c7cy00975e |
Funding Organization | the National Natural Science Foundation of China (No. 21403255;No. 21573260);he Youth Innovation Promotion Association CAS (2017460);the Western Light Program of the Chinese Academy of Sciences (2015);the Science and Technology Project of Jiangsu Province (BY2016048-01) |
Indexed By | SCI |
If | 5.773 |
Language | 英语 |
Funding Project | 多相催化-1研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22432 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) 苏州研究院 |
Corresponding Author | Chou LJ(丑凌军) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Suzhou Res Inst LICP, Suzhou 215123, Peoples R China |
Recommended Citation GB/T 7714 | Zhao HH,Song HL,Chou LJ,et al. Insight into the structure and molybdenum species in mesoporous molybdena-alumina catalysts for isobutane dehydrogenation[J]. Catalysis Science & Technology,2017,7(15):3258-3267. |
APA | Zhao HH.,Song HL.,Chou LJ.,Zhao J.,Yang J.,...&丑凌军.(2017).Insight into the structure and molybdenum species in mesoporous molybdena-alumina catalysts for isobutane dehydrogenation.Catalysis Science & Technology,7(15),3258-3267. |
MLA | Zhao HH,et al."Insight into the structure and molybdenum species in mesoporous molybdena-alumina catalysts for isobutane dehydrogenation".Catalysis Science & Technology 7.15(2017):3258-3267. |
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