Microporous transition-group metal organic framework material, and preparation and application methods thereof

Abstract

The invention relates to a microporous transition-group metal organic framework material, and preparation and application methods thereof. The structural formula of the material is [Cu2(C29H14O8)(H2O)2]7(C3H7NO)(H2O). The microporous transition-group metal organic framework material is prepared from transition-group metal copper salt and 5,5'-(9H-fluorenyl-2,7-diyl)m-phthalic acid under solvothermal conditions. The invention has the advantages of simple technique and low cost. The activated microporous transition-group metal organic framework substance has unsaturated metal sites and vacant micropores without terminal group coordinated water. The material has the advantages of high heat stability and favorable storage property for small-molecular gas acetylene, ethylene, ethane and methane, can selectively separate methane from a gas mixture of acetylene and methane, or ethylene and methane or ethane and methane, and can also selectively separate acetylene from a gas mixture of acetylene and carbon dioxide.

Description

technical field [0001] The invention relates to a microporous transition metal organic framework material and its preparation and use method Background technique [0002] Microporous metal-organic frameworks (MOFs) are a new type of microporous materials that have achieved rapid development in the field of chemistry in the past decade, consisting of metal ions or metal clusters as secondary building units (SBUs) and organic linking ligands. A crystalline material with a regular channel or hole structure that is directly self-assembled by a coordination bond. This material can spatially form a one-dimensional, two-dimensional or three-dimensional structure with an infinite network. They have the following characteristics: unique porous structure, high thermal stability, adjustable chemical properties, large specific surface area, high porosity and selective adsorption of small molecules, etc., and are regarded as the most promising candidates for gas storage and separation. ...

AI Technical Summary

Problems solved by technology

It is difficult to separate acetylene from carbon dioxide and methane using traditional separation methods such as cryogenic distillation because they are very similar in molecular size, sublimation point and critical temperature

In addition, the extreme energy consumption cannot be ignored

And the explosive nature of acetylene makes acetylene curing a potentially dangerous storage method

Hydraulic methane cannot be widely used commercially due to expensive cryogenic storage tanks and boiling losses, and multi-stage compression also makes the entire process of compressing methane expensive

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