Gas separation membrane and preparation method and application thereof

A technology of gas separation membrane and test method, which is applied in the field of gas separation membrane and can solve problems not related to separation

Active Publication Date: 2021-12-14
CHANGSHU 3F ZHONGHAO NEW CHEM MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this separation membrane shows high CO 2 / CH 4 selectivity, but it does not address whether such membranes can be used to separate hydrogen from methane mixtures
[0009] Although the existing separation membrane can obtain higher hydrogen or carbon dioxide separation coefficient, there is still room for further improvement in the hydrogen separation coefficient of this separation membrane. In addition, in addition to the hydrogen separation coefficient (gas selectivity), the separation membrane is also required It has excellent mechanical properties, heat resistance, chemical resistance, etc., and it is required that this gas separation membrane can be used to separate hydrogen from methane / hydrogen mixture and carbon dioxide from methane / carbon dioxide mixture

Method used

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  • Gas separation membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] With 245g poly-α, β, β-trifluorostyrene resin (intrinsic viscosity is 2.13dL / g), 5g Permalyn 6110, dissolve in the N of 750g, N-dimethylacetamide, make solid content be 25 wt% solution. Coat the polytrifluorostyrene solution on a glass plate by a coating machine (TQC automatic film coating machine), and then put the coated film in an oven to dry, first bake at 140°C for 2 hours, then heat-treat at 180°C for 1 hour, and peel off A dense film was obtained. The film thickness after drying was measured by a thickness gauge (Metricon 2010) to be 30 microns.

Embodiment 2

[0071] 250g of poly-α, β, β-trifluorostyrene resin (intrinsic viscosity is 1.77dL / g) is dissolved in 750g of N,N-dimethylacetamide, making a solution with a solid content of 25wt%, No other additives are added. All the other operations are the same as in Example 1.

Embodiment 3

[0073] Poly-α,β,β-trifluorostyrene resin with an intrinsic viscosity of 0.98 dL / g was made into a dense film with a thickness of 30 μm. All the other operations are the same as in Example 2.

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Abstract

The invention discloses a gas separation membrane, and a preparation method and application thereof. The gas separation membrane comprising 60-100 mol% of monomeric units derived from alpha,beta,beta-trifluorostyrene, has an intrinsic viscosity of 0.5-5.0 dL/g, a tensile strength of at least 50 MPa, and a hydrogen permeability coefficient of at least 100 barrer according to a test result of the GB/T 1038-2000 test method.

Description

technical field [0001] The present invention relates to a gas separation membrane for separating gases, especially carbon dioxide and / or hydrogen, from methane gas mixtures. The gas separation membrane of the present invention has excellent gas selectivity, excellent gas permeation rate, excellent mechanical properties, and excellent heat resistance and chemical resistance properties. Background technique [0002] Compared with conventional separation methods such as pressure swing adsorption and cryogenic distillation, the gas separation membrane separation method has many advantages such as high efficiency, energy saving, simple process operation, and less land occupation because it does not involve temperature change and phase change processes. It has important uses, including the recovery of hydrogen from the ammonia industry and the separation and enrichment of oxygen and nitrogen in the air. High-performance gas separation membranes are also widely used in the capture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/32B01D67/00B01D53/22C01B3/50C07C7/144C07C9/04C01B32/50
CPCB01D71/32B01D67/0002B01D53/228C01B3/503C01B32/50C07C7/144C01B2203/0405C07C9/04Y02C20/40Y02P20/151
Inventor 孙幸幸刘淑毓黄博宋黎峰吴君毅
Owner CHANGSHU 3F ZHONGHAO NEW CHEM MATERIALS
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