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Method for preparing ionic liquid/transition metal disulphide gas separating membrane and application thereof

A gas separation membrane, ionic liquid technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as poor stability, and achieve the effects of increasing stability, improving separation performance, and significantly gas separation performance.

Inactive Publication Date: 2017-06-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since ionic liquids are in a liquid state and have strong fluidity, they are less stable in separating carbon dioxide.

Method used

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  • Method for preparing ionic liquid/transition metal disulphide gas separating membrane and application thereof
  • Method for preparing ionic liquid/transition metal disulphide gas separating membrane and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Under the protection of argon, add 0.2g molybdenum disulfide powder to 2ml n-butyllithium n-hexane solution (15%), stir and react at room temperature for 48h, wash and dry thoroughly with hexane to obtain lithium intercalated molybdenum disulfide Powder LixMoS 2 .

[0021] 2) Add 0.02g LixMoS 2 Add to 2mL[Bmim][BF 4 ], mixed in an ice-water bath for 1 h to obtain MoS 2 [Bmim][BF 4 ]Dispersions. Under the negative pressure of 90KPa, 1ml MoS 2 [Bmim][BF 4 ] Suction filtration of the dispersion onto the inorganic alumina porous membrane to prepare [Bmim][BF 4 ] / MoS 2 Gas separation membranes, see figure 1 . figure 1 Shown [Bmim][BF 4 ] / MoS 2 The surface of the gas separation membrane is dense, and the film is continuous without cracks, so it can be seen that the two materials form a compact composite material. The diameter of the inorganic alumina porous membrane is 2.5cm, the pore diameter is 200nm, and the porosity is 25-50%;

[0022] 3) to the prepared ...

Embodiment 2

[0024] 1) Under the protection of argon, add 0.2g of tungsten disulfide powder to 2ml of n-butyllithium n-hexane solution (15%), heat and stir at 60°C for 48h, wash and dry thoroughly with hexane to obtain lithium intercalation disulfide Tungsten powder LixWS 2 .

[0025] 2) Add 0.02g LixWS 2 Add to 2mL[Bmim][BF 4 ], mixed in an ice-water bath for 1 h to obtain WS 2 [Bmim][BF 4 ]Dispersions. Under the negative pressure of 90KPa, 1ml WS 2 [Bmim][BF 4 ] Suction filtration of the dispersion onto the inorganic alumina porous membrane to prepare [Bmim][BF 4 ] / WS 2 Gas separation membranes, see figure 2 . figure 2 Shown [Bmim][BF 4 ] / WS 2 The surface of the gas separation membrane is dense, and the film is continuous without cracks, so it can be seen that the two materials form a compact composite material. The diameter of the inorganic alumina porous membrane is 2.5cm, the pore diameter is 200nm, and the porosity is 25-50%;

[0026]3) to the prepared [Bmim][BF 4 ] / ...

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Abstract

The invention discloses a method for preparing an ionic liquid / transition metal disulphide gas separating membrane and an application thereof. The method comprises the following steps: 1 ) transition metal disulphide powder MS2 (M means corresponding transition metal) and n-butyllithium are mixed to obtain the lithium intercalated transition metal disulphide powder LixMS2; 2) adding the LixMS2 into ionic liquid for ultrasonic mixing to obtain the MS2 ionic liquid dispersion liquid; and 3) performing vacuum pumping filtration on the dispersion liquid to obtain the required ionic liquid / transition metal disulphide gas separating membrane which is used for gas separation. The LixMS2 is interacted with ionic liquid during an ultrasonic process to form a MS2 two-dimensional layered material, the ionic liquid is subjected to in-situ introduction to the intermediate of a two-dimensional sheet layer; LiBF4 generated in ultrasound can increase the CO2 separating performance of a composite film; and ionic liquid confined effect and difference of different gas solubility are used for realizing the gas separating. The prepared gas separating membrane has high application value as well as concise and efficient preparation process.

Description

technical field [0001] The invention relates to the preparation and application of a gas separation composite membrane, in particular to an ionic liquid / transition metal disulfide gas separation membrane and its application. Background technique [0002] Gas separation membranes have been widely used in industrial production, such as separating H from biochemicals 2 , to separate CO from natural gas 2 , enrichment of water vapor, etc. Among them, two-dimensional layered materials such as graphene and graphene oxide have unique nanoscale channels, which have become a hot spot in the preparation of gas separation membranes. A large number of studies have shown that graphene and graphene oxide have good selectivity and good gas separation performance; however, there are very few studies on graphene-like two-dimensional materials as gas separation membranes. [0003] Transition metal dichalcogenides such as molybdenum disulfide and tungsten disulfide can be prepared by simple...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/10B01D67/00B01D53/22
CPCB01D53/228B01D67/0002B01D69/10B01D71/06Y02C20/40
Inventor 彭新生陈丹科应文
Owner ZHEJIANG UNIV
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