A method of separating methane and nitrogen

A technology for separating methane and nitrogen, which is applied in separation methods, chemical instruments and methods, methane capture, etc., can solve the problems of poor hydrothermal stability, high ligand price and high preparation cost, and achieves good water resistance and simple purification steps. , the effect of low synthesis cost
CN109107329BActive Publication Date: 2020-10-16ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2020-10-16

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Abstract

The invention discloses a method for separating methane and nitrogen gas. The method comprises the following steps: taking a metallic organic frame material as an adsorbing agent, and separating the methane and the nitrogen gas or purifying the methane from mixed gas, which contains the methane and the nitrogen gas, by adopting an adsorption and separation method; the structural general formula ofthe metallic organic frame material is [M(C6O4)].nH2O or [M2(C6O4)3].nH2O, in the formula, M is a metal ion, n is the number of water molecules, and the numerical value is 2-8. The metallic organic frame material has a three-dimensional network structure formed through coordination bonds or intermolecular force of transitional metal ions or alkaline-earth metal ions and organic ligands (2,5-dyhydroxyl-1,4-benzoquinone), wherein the water molecules coordinate with metal and have relatively strong hydrogen-bond interaction with oxygen atoms on the organic ligands. The organic ligands and metalsalt used for preparing the metal organic frame material utilized by the method provided by the invention are both cheap and easy to obtain, the synthetic conditions are mild, the purification steps are simple, and the operation and amplification are facilitated.
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Description

technical field

[0001] The invention relates to the technical field of adsorption materials and energy, in particular to a method for separating methane and nitrogen. Background technique

[0002] As the main component of natural gas, methane is becoming a clean and cheap energy resource. Compared with traditional chemical fuels such as coal and petroleum, the amount of carbon dioxide released by methane is relatively small on the basis of the same unit of energy, which also reduces the greenhouse effect caused by the burning of fossil fuels to a certain extent. At present, methane is widely used in industry, commerce and residential life, and according to statistics, it accounts for 22% of the energy in the world. Methane can generally be obtained through many unconventional resources, such as coal bed methane, landfill gas, biological fermentation and other unconventional resources. However, the methane gas obtained from unconventional resources is often complex in compo...

Claims

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