| Isobutane dehydrogenation over the mesoporous Cr2O3/Al2O3 catalysts synthesized from a metal-organic framework MIL-101 | |
| Department | OSSO国家重点实验室 |
Zhao HH(赵华华)1,2 ; Song HL(宋焕玲)1,3; Xu LL(徐磊磊)1,2; Chou LJ(丑凌军)1,3; Chou LJ(丑凌军)
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| 2013 | |
| Source Publication | Applied Catalysis A: General
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| ISSN | 0926-860X |
| Volume | 456Pages:188-196 |
| Abstract | The reactivity of isobutane dehydrogenation over a series of non-ordered mesoporous chromia/alumina (Cr2O3/Al2O3) catalysts with large specific surface area (149.4–381.6 m2 g−1) and high pore volume (0.77–1.24 cm3 g−1), synthesized using a metal-organic framework MIL-101 as a molecular host and chromium precursor, aluminium isopropoxide (Al(i-OC3H7)3) as the aluminium precursor, were studied in detail. The chromium species were highly dispersed over the catalyst with chromia loading up to 10 wt.%. The specific surface area of the catalyst decreased, whereas the amount of surface Cr3+ species and the mole ratio of Cr3+ and Cr6+ species (Cr3+/Cr6+) increased with the increasing chromia loadings (5–25 wt.%) and calcination temperature (500–900 ℃), respectively. The addition of potassium to the catalyst system greatly promoted isobutene selectivity and catalyst stability. The catalyst with 1.5 wt.% K2O and 10 wt.% Cr2O3 loadings calcined at 800 ℃ was found to exhibit the highest isobutane conversion 60.1% with the isobutene selectivity up to 93.2% among all the catalysts. The maintainable catalytic reactivity demonstrated the high stability of the catalyst in ten dehydrogenation-regeneration cycles. Moreover, it was proposed that the Cr3+ species was mainly the active site and catalytic selectivity was depended on the surface Cr3+/Cr6+ value over the catalyst. The catalyst presented much more stable dehydrogenation activity compared with the conventional catalyst. Consequently, this study presents a feasible way to facile synthesis of the mesoporous MOF-derived Cr2O3/Al2O3 catalysts with high stability and good catalytic reactivity over isobutane dehydrogenation. |
| Keyword | Chromia/alumina Isobutane Dehydrogenation Mesoporous Metal-organic Framework Mil-101 |
| Subject Area | 物理化学与绿色催化 |
| DOI | 10.1016/j.apcata.2013.02.018 |
| Funding Organization | the State Key Laboratory for Oxo Synthesis and Selective Oxidation of China;Suzhou Science and Technology Bureau of Applied Foundation Research Project (SYG201219) |
| Indexed By | SCI |
| If | 3.674 |
| Language | 英语 |
| Funding Project | 多相选择氧化课题组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/4414 |
| Collection | 羰基合成与选择氧化国家重点实验室（OSSO） |
| 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, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China |
| Recommended Citation GB/T 7714 | Zhao HH,Song HL,Xu LL,et al. Isobutane dehydrogenation over the mesoporous Cr2O3/Al2O3 catalysts synthesized from a metal-organic framework MIL-101[J]. Applied Catalysis A: General,2013,456:188-196. |
| APA | Zhao HH,Song HL,Xu LL,Chou LJ,&丑凌军.(2013).Isobutane dehydrogenation over the mesoporous Cr2O3/Al2O3 catalysts synthesized from a metal-organic framework MIL-101.Applied Catalysis A: General,456,188-196. |
| MLA | Zhao HH,et al."Isobutane dehydrogenation over the mesoporous Cr2O3/Al2O3 catalysts synthesized from a metal-organic framework MIL-101".Applied Catalysis A: General 456(2013):188-196. |
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| Zhao-2013-Isobutane （1961KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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