Unlock instant, AI-driven research and patent intelligence for your innovation.

Separation method of mixed gas of hydrogen and methane

A separation method and mixed gas technology, applied in the field of membrane separation, can solve the problems of limited application, unstable cost of metal organic framework membrane materials, etc., and achieve the effects of easy film formation, excellent separation performance, and good solubility

Active Publication Date: 2020-07-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to factors such as the instability of metal-organic framework membrane materials and the high cost of ligand raw materials, their application in gas separation is limited to some extent.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Separation method of mixed gas of hydrogen and methane
  • Separation method of mixed gas of hydrogen and methane
  • Separation method of mixed gas of hydrogen and methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of film-forming raw materials:

[0025] Weigh 1.8378 grams of zinc acetate dihydrate (Zn(Ac) 2 2H 2 O) was dissolved in 10 ml of dimethyl sulfoxide (DMSO), and 0.9 g of polybenzimidazole was dissolved in 10 ml of DMSO. Add the former to the latter and mix under airtight condition and stir at room temperature for 1 hour to obtain a film-forming raw material solution. The metal ion: ligand molar ratio is 4:1.

[0026] 2. Film forming reaction:

[0027] The raw material solution prepared in step 1 was sealed and placed in a blast drying oven to naturally raise the temperature to 100° C. and react for 72 hours to obtain a film-forming solution.

[0028] 3. Squeeze coating and dry to form a film:

[0029] The surface of the film scraping machine is naturally heated to 80°C, the scraper is set to 250 microns, and the scraping speed is set to 50 mm / s. Gently push the side with glass to the other side to prepare a film, and dry it with the surface of the fi...

Embodiment 2

[0033] Performance evaluation of product A

[0034] Permeability and selectivity are two important indicators to evaluate the gas separation performance of the membrane, and the permeability (P i ) and separation coefficient (α ij ) to represent. Permeability P i =J i / A*ΔP, where J i is the permeation flow rate of the gas, unit mol m -2 the s -1 , A is the effective membrane area, unit m 2 , ΔP is the pressure difference on both sides of the membrane, unit Pa; separation coefficient α ij =P i / P j , where P i is the permeability of gas i, P j is the permeability of gas j.

[0035] The gas permeability performance of the synthesized membrane products was systematically tested using the Wicke–Kallenbach (a method of membrane testing) method combined with on-line gas chromatography. The test conditions are: the temperature is 25° C., and the pressure difference on both sides of the membrane is 1 bar. The test result shows: 10 -8 mol m -2 the s -1 Pa -1 conditio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The separation method of hydrogen and methane mixed gas, using Zn 2+ A metal-organic framework membrane combined with polybenzimidazole was used for separation. The invention is in H 2 / CH 4 In the separation scheme of mixed gas, a new type of Zn 2+ A metal-organic framework membrane combined with polybendizole has excellent H 2 / CH 4 separation performance. At the same time, the adopted organic ligand polybendizole has the characteristics of low cost, good solubility, easy film formation and easy realization of scale-up, thereby realizing industrialization and the like.

Description

technical field [0001] The invention belongs to the field of membrane separation, in particular to H 2 / CH 4 Separation method of mixed gas. Background technique [0002] h 2 It is a very important part of the energy system. H that exists in free form in nature 2 Rarely, the most effective and environmentally friendly preparation method is CH 4 cracking method, where, H 2 / CH 4 The separation of mixed gas is the preparation of high-purity H 2 key process. At the same time, my country's industrial production produces a large amount of H-rich 2 / CH 4 waste mixed gas, if high-purity H can be effectively separated from it 2 , has great industrial application value. [0003] Compared with traditional separation technology, gas membrane separation technology has many advantages such as low energy consumption, simple device and less environmental pollution. Metal-organic framework (MOF) was produced in the 1990s. It is a crystalline material with a periodic network str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/22C08L79/04C08J5/18C01B3/50
CPCB01D53/228B01D2256/16B01D2257/7025C01B3/503C01B2203/048C08J5/18C08J2379/04C08L79/04C08L2203/16Y02C20/20
Inventor 杨维慎矫文美
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI