Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution

doi:10.1016/j.micromeso.2016.01.030

	Rationally tuning the separation performances of [M-3(HCOO)(6)] frameworks for CH4/N-2 mixtures via metal substitution
	Sun, Tianjun 1; Liu, Xiaowei 1,2; Hu, Jiangliang 1,2; Zhao, Shengsheng 1; Wang, Shudong 1
刊名	MICROPOROUS AND MESOPOROUS MATERIALS
	2016-05-01
卷号	225 页码:456-464
关键词	Metal-organic Frameworks Ch4/n-2 Metal Substitution Selectivity Adsorption Behaviour
ISSN号	1387-1811
DOI	10.1016/j.micromeso.2016.01.030
文献子类	Article
英文摘要	A 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.
WOS关键词	ZEOLITIC IMIDAZOLATE FRAMEWORKS ; PRESSURE SWING ADSORPTION ; ORGANIC FRAMEWORKS ; CARBON-DIOXIDE ; MOLECULAR-SIEVE ; ACTIVATED CARBON ; METHANE STORAGE ; GAS SORPTION ; STRUCTURAL-CHARACTERIZATION ; SELECTIVE ADSORPTION
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000373421700052
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170704]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Sun, Tianjun; Wang, Shudong
作者单位	1.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
推荐引用方式 GB/T 7714	Sun, Tianjun,Liu, Xiaowei,Hu, Jiangliang,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	Sun, Tianjun,Liu, Xiaowei,Hu, Jiangliang,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	Sun, Tianjun,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.