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Commensurate stacking within confined ultramicropores boosting acetylene storage capacity and separation efficiency

Nano Research 2023年第5期16卷 7742-7748页

作者： Zhenghui Huang Kungang Chai Chengjun Kang Rajamani Krishna Zhaoqiang Zhang Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore Van’t Hoff Institute for Molecular Sciences University of AmsterdamPark 904Amsterdam 1098 XHThe Netherlands

Developing advanced porous materials possessing both a high storage capacity and selectivity for acetylene(C_(2)H_(2))remains challenging but a sought-after *** we show a strategy involving synergic combination of spatial confinement and commensurate stacking for enhanced C_(2)H_(2)storage and capture via maximizing the host–guest and guest–guest *** ultramicroporous metal-organic frameworks(MOFs),MIL-160 and MOF-303 are elaborately constructed to exhibit ultrahigh C_(2)H_(2)uptakes of 235 and 195 cm^(3)·g^(−1),respectively,due to the confinement effect of the suitable pore sizes and periodically dispersed molecular recognition ***,C_(2)H_(2)capacity of MIL-160 sets a new benchmark for C_(2)H_(2)*** exceptional separation performances of two materials for C_(2)H_(2)over both CO_(2)and ethylene(C_(2)H_(4)),which is rarely observed,outperform most of the benchmark materials for C_(2)H_(2)*** scrutinized the origins of ultrahigh C_(2)H_(2)loading in the confined channels via theoretical *** superior separation efficiency for C_(2)H_(2)/CO_(2)and C_(2)H_(2)/C_(2)H_(4)mixtures with unprecedented C_(2)H_(2)trapping capacity(>200 L·kg^(−1))was further demonstrated by dynamic breakthrough experiments.

关键词： adsorption and separation acetylene storage commensurate stacking gas cluster metal-organic frameworks

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Auxiliary ligand-directed assembly of a non-interpenetrated cage-within-cage metal-organic framework for highly efficient C_(2)H_(2)/CO_(2) separation

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Chinese Journal of Structural Chemistry 2023年第6期42卷 22-26页

作者： Yong-Peng Li Jing-Jing Ni Shu-Cong Fan Quan-Guo Zhai School of Chemistry and Chemical Engineering Institute of Applied CatalysisYantai UniversityYantaiShandong 264005China Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry&Chemical Engineering Shaanxi Normal UniversityXi'an710062China

The development of metal-organic frameworks(MOFs)with highly efficient adsorption and separation of acet-ylene is very important and challenging in chemical industry due to the explosive nature of *** MOFs can be constructed by inserting a second auxiliary ligand,which allows the use of large ligands to construct non-interpenetrated structures and increase pore ***,SNNU-205 is successfully synthesized,which connects two sets of interpenetrated structures to form a double walled cage-within-cage structure by using the introduction of a second auxiliary *** modified pore environment enables SNNU-205 to efficiently selectively adsorb C_(2)H_(2)over CO_(2).At 298 K and 1 atm,SNNU-205 can uptake much more C_(2)H_(2)(76.3 cm^(3)g1)than CO_(2)(47.3 cm^(3)g^(-1)),resulting in a high substance ratio of C_(2)H_(2)-to-CO_(2)(1.6).More importantly,the ideal adsorbed solution theory selectivity calculations and column breakthrough tests further indicate SNNU-205 to be promising adsorbents for C_(2)H_(2)adsorption and purification.

关键词： Metal-organic frameworks(MOFs) Second auxiliary ligand acetylene storage acetylene/carbon dioxide separation

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Interpenetrated Coordination Networks for C2H2/CO2 Separations

Interpenetrated Coordination Networks for C2H2/CO2 Separatio...

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中国化学会第十届全国无机化学学术会议

作者： Qing-Yuan YANG School of Chemical Engineering and Technology Xi’an Jiaotong University

acetylene(CH), mainly produced by the cracking of petroleum, is one of the important and widely used raw chemicals. Such common methods used for producing CH usually introduce some contaminants, such as carbon dioxide(CO). Thus, high-efficiency separation of CH from CO are of significance. The traditional approaches for the separation of CH/CO is based on extraction using organic solvents, which is of high energy consumption and low efficiency. Therefore, development of new separation strategies is urgent needed. Among the diverse materials, coordination networks, also known as porous coordination polymers(PCPs), metal-organic frameworks(MOFs) or metal-organic materials(MOMs), are of particularly interest for such demands. Here, we introduce one diamondoid(dia) coordination network, Ni[4-(pyridyl)-4-carboxylate]2(Dia-1-Ni), that exhibits not only high CH/CO selectivity and but also high CH storage capacity simultaneously. Furthermore, that compound has been evaluated for CH purification when CO is present through dynamic gas breakthrough experiments.

关键词： Coordination networks acetylene storage C2H2/CO2 separations Diamondoid

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Interpenetrated Coordination Networks for C2H2/CO2 Separations

Interpenetrated Coordination Networks for C2H2/CO2 Separatio...

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中国化学会第十五届固态化学与无机合成学术会议

作者： Qing-Yuan Yang School of Chemical Engineering and Technology Xi’an Jiaotong University

关键词： Coordination networks acetylene storage C2H2/CO2 separations Diamondoid

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