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Preparation method of hollow fiber double phase composite ceramic oxygen permeable membrane

A technology of composite ceramics and oxygen-permeable membranes, applied in separation methods, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of low oxygen permeation flux of oxygen-permeable membranes, and achieve oxygen exchange entropy change and exchange enthalpy change Low, surface exchange coefficient increased, the effect of uniform particle distribution

Inactive Publication Date: 2019-05-14
常州欧利莱照明有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problem of low oxygen permeation flux of the existing oxygen permeable membrane, a preparation method of hollow fiber dual-phase composite ceramic oxygen permeable membrane is provided

Method used

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  • Preparation method of hollow fiber double phase composite ceramic oxygen permeable membrane

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Effect test

example 1

[0035] Add polyether alum and polyvinylpyrrolidone to N-methylpyrrolidone, stir at 150r / min at room temperature for 6h to obtain an organic solution; heat the biphasic composite powder into the organic solution, and stir at 400r / min at room temperature for 22h , to obtain the casting solution; 2 / 3 of the casting solution was added to the slurry tank, and vacuum degassed for 30 minutes. Under nitrogen pressure, the casting solution passed through the spinneret to obtain a hollow fiber membrane green body; Soak the blank in deionized water for 46 hours, cut it, and dry it in the air for 12 hours to obtain a solidified hollow fiber membrane green body; immerse one end of the solidified hollow fiber membrane green body in 1 / 3 of the casting solution, take it out Soak in deionized water for 12 hours, and dry at room temperature for 10 hours to obtain a green hollow fiber membrane with one end sealed; place the hollow fiber membrane green body with one end sealed in a sintering furna...

example 2

[0037] Add polyether alum and polyvinylpyrrolidone into N-methylpyrrolidone, stir at 175r / min at room temperature for 7h to obtain an organic solution; heat the biphasic composite powder into the organic solution, and stir at 450r / min at room temperature for 23h , to obtain the casting solution; 2 / 3 of the casting solution was added to the slurry tank, and vacuum degassed for 35 minutes. Under nitrogen pressure, the casting solution passed through the spinneret to obtain a hollow fiber membrane green body; Soak the blank in deionized water for 47 hours, cut it, and dry it in the air for 14 hours to obtain a solidified hollow fiber membrane green body; immerse one end of the solidified hollow fiber membrane green body in 1 / 3 of the casting solution, take it out Soak in deionized water for 14 hours, dry at room temperature for 11 hours to obtain a hollow fiber membrane green body with one end sealed; place the hollow fiber membrane green body with one end sealed in a sintering fu...

example 3

[0039] Add polyether alum and polyvinylpyrrolidone to N-methylpyrrolidone, and stir at 200r / min at room temperature for 8h to obtain an organic solution; heat the biphasic composite powder into the organic solution, and stir at room temperature at 500r / min for 24h , to obtain the casting solution; 2 / 3 of the casting solution was added to the slurry tank, and vacuum degassed for 40 minutes. Under nitrogen pressure, the casting solution passed through the spinneret to obtain a hollow fiber membrane green body; the hollow fiber membrane Soak the blank in deionized water for 48 hours, cut it, and dry it in the air for 16 hours to obtain a solidified hollow fiber membrane green body; immerse one end of the solidified hollow fiber membrane green body in 1 / 3 of the casting solution, take it out Soak in deionized water for 16 hours, and dry at room temperature for 12 hours to obtain a hollow fiber membrane green body with one end sealed; place the hollow fiber membrane green body with ...

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Abstract

The invention relates to a preparation method of a hollow fiber double phase composite ceramic oxygen permeable membrane and belongs to the technical field of ceramic oxygen permeable membranes. The double phase composite ceramic oxygen permeable membrane is prepared by taking cobalt and chromium-free perovskite as an electronic conducting phase and doped samarium oxide and cerous nitrate as an oxygen ion conducting phase. The hollow fiber double phase composite ceramic oxygen permeable membrane prepared through a phase conversion method is fibrous in shape, has self-supporting action, and hasa selective permeability characteristic. The filling density of the hollow fiber double phase composite ceramic oxygen permeable membrane is greater than that of a conventional ceramic permeable membrane. Compared with the conventional ceramic permeable membrane, the effective area of the ceramic permeable membrane in a same volume is increased greatly. The hollow fiber double phase composite ceramic oxygen permeable membrane can permeate oxygen in different directions: inward or outward according to the equipment demand and the final product demand, so that compared with other oxygen permeable membranes, the hollow fiber double phase composite ceramic oxygen permeable membrane is relatively good in application flexibility.

Description

technical field [0001] The invention relates to a method for preparing a hollow fiber dual-phase composite ceramic oxygen-permeable membrane, and belongs to the technical field of ceramic oxygen-permeable membranes. Background technique [0002] The earliest oxygen permeable membranes appeared in the form of circular flat membranes, and their main purpose was to determine the performance of ceramic electrolyte materials. Such circular flat membranes are easily produced by the traditional static pressure method, but sheet membranes have a series of problems such as high-temperature sealing, connection, small membrane area, and pressure resistance. In addition, the following aspects also affect the performance of the circular flat membrane reactor: (1) the high electrochemical mass transfer resistance caused by the symmetrical structure of the membrane; (2) a large number of reactions on the circular flat membrane (3) High-temperature sealing problems caused by the mismatch o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/08B01D69/12B01D71/52B01D71/82B01D71/02B01D53/02
Inventor 陈倩
Owner 常州欧利莱照明有限公司
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