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Preparation method of double-transport channel sheet-like ceramic membrane with independent and regular distribution of two phases

A transport channel and ceramic membrane technology, which is applied to ceramic molding machines, chemical instruments and methods, and membranes, can solve the problems of complex preparation process, mutual blockage, and long channels of dual-phase ceramic membranes, so as to improve mass transfer efficiency, The effect of improving production efficiency and saving preparation cost

Active Publication Date: 2019-03-26
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a method of combining tape casting molding and spinning molding to prepare dual-phase independent and regularly distributed dual-transport channel sheet-like ceramic membranes, which solves the problem of long channels, mutual blocking and complicated preparation processes of the current dual-phase ceramic membranes. The problem

Method used

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  • Preparation method of double-transport channel sheet-like ceramic membrane with independent and regular distribution of two phases
  • Preparation method of double-transport channel sheet-like ceramic membrane with independent and regular distribution of two phases
  • Preparation method of double-transport channel sheet-like ceramic membrane with independent and regular distribution of two phases

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Because La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 (LSCF) is more electronically conductive than SrCe 0.9 Y 0.1 o 3 (SCY) has good proton conductivity, so SCY is used as the continuous phase of the dual-phase membrane, and LSCF is used as the dispersed phase.

[0043] Add 10g of LSCF and 20g of SCY to an appropriate amount of polyethersulfone / NMP solution with a weight fraction of 20%, respectively, and fully mix them on a rapid mill to obtain two kinds of casting solutions, and then separate the two casting solutions Put it in a degasser and degas it with a vacuum pump for 1h.

[0044] The LSCF casting solution was spun and cut into particles with a diameter of 0.4 mm and a length of 1.5 mm. The SCY casting solution is cast into a cylindrical mold with a diameter of 20mm and a thickness of 1.5mm, and at the same time, the sheared LSCF particles are evenly dispersed in SCY, and finally the mold is put into pure water for phase change solidification to obtain SCY / LSCF bip...

Embodiment 2

[0047] Combine 20g SCY and 10g NiFe 2 o 4 (NFO) were respectively added to an appropriate amount of polyethersulfone / NMP solution with a weight fraction of 20%, and were fully mixed on a rapid mill to obtain two kinds of casting solutions, and then the two casting solutions were put into degassing The device was degassed with a vacuum pump for 1 h.

[0048] The NFO casting liquid is spun on the spinning device and cut into particles with a diameter of 0.4mm and a length of 1.5mm. The SCY casting solution is cast into a cylindrical mold with a diameter of 20mm and a thickness of 1.5mm, and at the same time, the sheared NFO particles are evenly dispersed in SCY, and finally the mold is put into pure water for phase change solidification to obtain SCY / NFO dual-phase film precursor whose structure is as figure 2 . Only the continuous phase is SCY, and the dispersed phase is NFO.

[0049] The dual-phase film precursor was placed in an oven to dry, and then heated to 800°C in...

Embodiment 3

[0051] Add 20g of SCY and 10g of titanium oxide to an appropriate amount of polyethersulfone / NMP solution with a weight fraction of 20%, and mix them fully on a rapid mill to obtain two casting solutions, and then mix the two casting solutions Put them into a degasser and degas them with a vacuum pump for 1h.

[0052] The titania casting solution is spun on a spinning device and cut into particles with a diameter of 0.4 mm and a length of 1.5 mm. The SCY casting solution is cast into a cylindrical mold with a diameter of 20mm and a thickness of 1.5mm. At the same time, the sheared titanium dioxide particles are evenly dispersed into the SCY, and finally the mold is put into pure water for phase change solidification. Obtain SCY / titania dual-phase film precursor, its structure is as follows figure 2 . Only the continuous phase is SCY, and the dispersed phase is titanium oxide.

[0053] The dual-phase film precursor was placed in an oven to dry, and then heated to 800°C in a...

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Abstract

The invention relates to the technical field of inorganic membrane separation, and in particular relates to a preparation method of a biphase independent regularly-distributed chip ceramic membrane with double transport channels. The preparation method is based on spinning and flow casting molding techniques, and comprises the following steps: ionic conduction ceramic powder and electronic conduction ceramic powder are used as raw materials, the ceramic powder with low electric conductivity in the ionic conduction ceramic powder and the electronic conduction ceramic powder is molded by the flow casting process to obtain a continuous phase, the ceramic powder with high electric conductivity in the ionic conduction ceramic powder and the electronic conduction ceramic powder is molded by the spinning process to obtain a dispersed phase, then the dispersed phase is uniformly dispersed into the continuous phase, a biphase membrane precursor is prepared by phase change curing, and the biphase independent regularly-distributed chip ceramic membrane with double transport channels is obtained by sintering. The preparation method has high preparation efficiency, good stability and low cost, overcomes the problem that bi-component mixed distribution can result in mutual clogging, greatly improves the rate of mass transfer, and has low requirements on the chemical compatibility of the two materials.

Description

technical field [0001] The invention relates to the technical field of inorganic membrane separation, in particular to a method for preparing a sheet-shaped ceramic membrane with dual-phase independent and regular distribution and dual transport channels. Background technique [0002] Inorganic membrane separation technology is an important chemical separation technology. Using the separation function of inorganic membranes to couple with the catalytic reaction process is also an important application field of reaction-separation engineering. Ion-electron mixed conductor ceramic membranes have extraordinary application prospects in gas separation and purification, fuel cells, and reactors. In particular, the development of ceramic-ceramic or ceramic-metal dual-phase membranes prepared by two different powders improves the electronic conductivity of the membrane and makes it possible to separate and react without external power supply. [0003] Chinese patent CN200710158721...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/02C04B35/80C04B35/50C04B35/622B28B1/29B28B11/24
CPCB01D67/0039B01D2323/39B28B1/29B28B11/243C04B35/50C04B35/62218C04B35/80C04B2235/3213C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/3232C04B2235/3268C04B2235/3272C04B2235/3275
Inventor 孟波王慧娜王同同孟秀霞王晓斌杨乃涛谭小耀刘少敏
Owner SHANDONG UNIV OF TECH
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