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题名: Low Temperature CO2 Methanation: ZIF-67-Derived Co-Based Porous Carbon Catalysts with Controlled Crystal Morphology and Size
作者: Li, Wenhui1;  Zhang, Anfeng1;  Jiang, Xiao2;  Chen, Chen1;  Liu, Zhongmin3;  Song, Chunshan1, 2;  Guo, Xinwen1
关键词: CO2 methanation ;  Low-temperature ;  ZIF-67 ;  CTAB ;  Cobalt
刊名: ACS SUSTAINABLE CHEMISTRY & ENGINEERING
发表日期: 2017-09-01
DOI: 10.1021/acssuschemeng.7b01306
卷: 5, 期:9, 页:7824-7831
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A Co-based zeolitic imidazolate framework, ZIF-67, has been utilized as a precursor to obtain Co-based porous carbon catalysts. The obtained catalysts display an outstanding catalytic performance toward the CO2 methanation at low temperature. The ZIF-67 crystal morphology can be controlled from cubic to rhombic dodecahedron, and the original particle sizes can be regulated from 150 nm to 1 mu m in aqueous solution by cetyltrimethylammonium bromide (CTAB) surfactants. After carbonation in N-2 flow, Co-based porous carbon catalysts kept the original ZIF-67 crystal morphology and particle size but differed in the micropore property; the 0.01 wt % CTAB content led to the maximum micropore volume 0.125 cm(3)/g. The Co nanoparticles inside the carbon matrix range between 7 and 20 nm, and they are separated by the graphite-like carbon avoiding the metal sintering effectively. Furthermore, the catalysts with 0.01% CTAB addition exhibited the highest CO2 conversion (52.5%) and CH4 selectivity (99.2%) under the 72000 mL g(-1) h(-1) GHSV (gas hourly space velocity) at 270 degrees C. Noticeably, the Co/PC catalysts performed higher activity and stability than the supported catalysts 20Co/AC. The versatile way offers good prospects for low temperature CO2 methanation and prevents metal sintering effectively.
关键词[WOS]: ZEOLITIC IMIDAZOLATE FRAMEWORKS ;  METAL-ORGANIC FRAMEWORK ;  SMALL MICROPORES ;  AQUEOUS-SOLUTION ;  PARTICLE-SIZE ;  HYDROGENATION ;  NANOPARTICLES ;  METHANOL ;  OXIDE ;  DIOXIDE
语种: 英语
WOS记录号: WOS:000410006200042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150134
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem, Fac Chem, Dalian 116024, Peoples R China
2.Penn State Univ, PSU DUT Joint Ctr Energy Res, EMS Energy Inst, Clean Fuels & Catalysis Program, University Pk, PA 16802 USA
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China

Recommended Citation:
Li, Wenhui,Zhang, Anfeng,Jiang, Xiao,et al. Low Temperature CO2 Methanation: ZIF-67-Derived Co-Based Porous Carbon Catalysts with Controlled Crystal Morphology and Size[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2017,5(9):7824-7831.
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