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Oxygen-permeable membrane surface coated with modified material and method for preparing composite oxygen-permeable membrane

A technology of composite oxygen-permeable membrane sheet and modified material, which is applied in the field of mixed conductor oxygen-permeable membrane material and its preparation, oxygen-permeable membrane material and its preparation field, and can solve the problem that the oxygen permeability and stability of the mixed-conductor oxygen-permeable membrane are not ideal. and other problems, to achieve the effect of improving oxygen permeability, improving stability, and combining firmness

Inactive Publication Date: 2015-10-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen permeability and stability of the existing mixed-conductor oxygen-permeable membranes used for hydrogen production from coke oven gas are not ideal

Method used

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  • Oxygen-permeable membrane surface coated with modified material and method for preparing composite oxygen-permeable membrane
  • Oxygen-permeable membrane surface coated with modified material and method for preparing composite oxygen-permeable membrane
  • Oxygen-permeable membrane surface coated with modified material and method for preparing composite oxygen-permeable membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, see figure 1 and figure 2 , the method for preparing a composite oxygen-permeable membrane by coating the modified material on the surface of the oxygen-permeable membrane has the following processes and steps:

[0023] 20.434 mmol of Ba(NO 3 ) 2 , 20.434 mmol of Co(NO 3 ) 2 ·6H 2 O, 20.434 mmol of Fe(NO 3 ) 3 9H 2 O and 10.217 mmol of Gd 2 o 3 Dissolve in 100 ml with a concentration of 0.5 mol·L -1 In the aqueous solution of nitric acid, stir until completely dissolved; according to the metal ion: ethylenediaminetetraacetic acid (EDTA): the mass ratio of citric acid is 1: 1: 2, accurately weigh the quality of EDTA and citric acid, add deionized water and Stir to dissolve the organic matter; mix the two obtained solutions, add ammonia water dropwise until the pH of the solution is 6.0, and keep the temperature of the solution at 90°C until the reactant becomes a sol. Dry the obtained sol-like substance at 110°C, take it out after the sol-l...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, especially in that:

[0028] In this embodiment, the method for preparing a composite oxygen-permeable membrane by coating the modified material on the surface of the oxygen-permeable membrane has the following processes and steps:

[0029] 20.434 mmol of Ba(NO 3 ) 2 , 40.868 mmol of Co(NO 3 ) 2 ·6H 2 O and 10.217 mmol of Gd 2 o 3 Dissolve in 100 ml with a concentration of 0.5 mol·L -1 In the aqueous solution of nitric acid, stir until completely dissolved; according to the metal ion: ethylenediaminetetraacetic acid (EDTA): the mass ratio of citric acid is 1:1:2, accurately weigh the quality of EDTA and citric acid, add deionized water and Stir to dissolve the organic matter; mix the two obtained solutions, add ammonia water dropwise until the pH of the solution is 6.5, and keep the temperature of the solution at 95°C until the reactant becomes a sol. Dry the obtained sol-like substance at 105°C, take it out...

Embodiment 3

[0032] This embodiment is basically the same as the previous embodiment, and the special features are:

[0033] In this embodiment, the method for preparing a composite oxygen-permeable membrane by coating the modified material on the surface of the oxygen-permeable membrane has the following processes and steps:

[0034] 20.434 mmol of La(NO 3 ) 3 ·6H 2 O, 20.434 mmol of Co(NO 3 ) 2 ·6H 2 O, 20.434 mmol of Fe(NO 3 ) 3 9H 2 O and 10.217 mmol of Gd 2 o 3 Dissolve in 100 ml of nitric acid aqueous solution with a concentration of 0.5 mol L, stir until completely dissolved; accurately weigh EDTA and To the quality of citric acid, add deionized water and stir to dissolve the organic matter; mix the two obtained solutions, add ammonia water dropwise until the pH of the solution is 6.0, and keep the temperature of the solution at 90°C until the reactant becomes a sol. Dry the obtained sol-like substance at 110°C, take it out after the sol-like substance expands into a spon...

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Abstract

The invention discloses a modified material coated on the surface of an oxygen permeable membrane, which is formed by loading active metals on a perovskite-like substrate. The material composition chemical formula of the perovskite-like substrate is REBaCo2-xFexO5+δ, wherein RE is Any one or any two of Gd, La, Pr and Sm, where the value of x is between 0 and 2.0, and the active metal is any one or any of Ag, Ru, Pd, Pt, Ni and Co two kinds. The invention also discloses a method for preparing a composite oxygen-permeable membrane. The perovskite-like matrix powder is prepared by the citric acid complexation method, and the coated modified slurry is prepared by the ball milling method, and the slurry is dipped and smeared on the After the oxygen-permeable membrane permeates the side, the active metal salt solution is added dropwise on the coating to obtain a modified composite oxygen-permeable membrane. The coated modified coating of the present invention has a porous microstructure, which is firmly combined with the membrane matrix, and can significantly improve the permeation volume and stability of the oxygen-permeable membrane.

Description

technical field [0001] The invention relates to an oxygen-permeable membrane material and a preparation method thereof, in particular to a mixed-conductor oxygen-permeable membrane material used in coke oven gas hydrogen production and a preparation method thereof, which is applied in the technical fields of comprehensive utilization of metallurgical resources and functional ceramics manufacturing . Background technique [0002] Oxygen-permeable membrane materials have very attractive application prospects in industrial processes that require continuous supply of pure oxygen or oxygen separation, such as partial oxidation of hydrocarbons, oxygen-enriched combustion, and decomposition of carbon dioxide. For example, see image 3 , at a reaction temperature of 750°C, at a helium flow rate of 100 ml min -1 and an air flow rate of 300 ml min -1 Under the condition that BaCo 0.7 Fe 0.21 Nb 0.09 o 3-y (BCFN) The oxygen permeability of a single oxygen permeable membrane is 0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/88
Inventor 程红伟鲁雄刚陶伟姚为林李光石
Owner SHANGHAI UNIV
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