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Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution
Hu, Jiangliang1,2; Sun, Tianjun1; Liu, Xiaowei1,2; Zhao, Shengsheng1; Wang, Shudong1
KeywordMetal-organic Frameworks Ch4/n-2 Metal Substitution Selectivity Adsorption Behaviour
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
2016-05-01
ISSN1387-1811
DOI10.1016/j.micromeso.2016.01.030
Volume225Pages:456-464
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordZEOLITIC IMIDAZOLATE FRAMEWORKS ; PRESSURE SWING ADSORPTION ; ORGANIC FRAMEWORKS ; CARBON-DIOXIDE ; MOLECULAR-SIEVE ; ACTIVATED CARBON ; METHANE STORAGE ; GAS SORPTION ; STRUCTURAL-CHARACTERIZATION ; SELECTIVE ADSORPTION
AbstractA series of isostructural ultra-microporous metal-organic framework (MOF) compounds [M-3(HCOO)(6)] (M = Mg, Mn, Co and Ni) have been readily synthesized in large-scale, characterized, and evaluated for the separation of CH4 and N-2. Results indicate that the metallic formates exhibit different CH4 adsorption capacities and distinct CH4/N-2 selectivity in a sequence of Ni > Co > Mg > Mn analogue owing to their varied CH4 affinities. Thereinto, [Ni-3(HCOO)(6)] shows the highest CH4 adsorption capacity of 1.09 mmol/g and CH4/N-2 selectivity up to 6.5 at 0.4 MPa and 298 K in the dynamic experiments, which suggests the most suitable synergistic effect between constricted pores and surface properties among [M-3(HCOO)(6)] frameworks. At the same time, the adsorption behaviour in [M-3(HCOO)(6)] is investigated by NH3-TPD, revealing that the adsorbed NH3 molecules should have two different states. One is that gas molecules stay inside the pores, the other is that gas molecules are adsorbed on the adsorption sites induced by the coordinated metal ions or exposed oxygen of the [M-3(HCOO)(6)], which directly affects the adsorption capacity, the ratio of two states of molecules and the final selectivity. These results confirm that alteration of metal ion plays an important role in the tuning of pore size and internal surface properties, thus providing new clues to design MOFs with different pore characteristics for enhanced gas sorption and separation. (C) 2016 Elsevier Inc. All rights reserved.
Language英语
WOS IDWOS:000373421700052
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/170705
Collection中国科学院大连化学物理研究所
Corresponding AuthorSun, Tianjun; Wang, Shudong
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Hu, Jiangliang,Sun, Tianjun,Liu, Xiaowei,et al. Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2016,225:456-464.
APA Hu, Jiangliang,Sun, Tianjun,Liu, Xiaowei,Zhao, Shengsheng,&Wang, Shudong.(2016).Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution.MICROPOROUS AND MESOPOROUS MATERIALS,225,456-464.
MLA Hu, Jiangliang,et al."Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution".MICROPOROUS AND MESOPOROUS MATERIALS 225(2016):456-464.
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