Plate shaped ceramic film composed of multiple hollow fiber ceramic films by parallel connection and preparation thereof
A ceramic membrane and hollow technology is applied in the field of plate-shaped hollow fiber ceramic membrane elements and their preparation, which can solve the problems of high manufacturing cost, reduced service life of membrane modules, low membrane permeation flux, etc., to improve reliability and service life. , The effect of improving the manufacturing yield and high membrane area capacity
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Embodiment 1
[0022] Example 1: A single-tube green body of LSM-YSZ hollow fiber ceramic membrane with one end open and one end closed was prepared by phase inversion method, and then 30 dried hollow fiber ceramic membrane green bodies were arranged side by side in a single layer and placed in adjacent hollow A certain extrusion force is applied between the fiber ceramic membrane green bodies, and in this state, they are sintered at high temperature to make a plate-shaped dense hollow fiber oxygen-permeable ceramic membrane element composed of 30 hollow fiber ceramic membranes connected in parallel.
[0023] The concrete steps of this embodiment are as follows:
[0024] 1. Press La 0.7 Sr 0.3 MnO 3 (LSM) and Zr 0.82 Y 0.18 o 2 The mass ratio of (YSZ) is 70:100, weigh LSM powder with an average particle size of 0.6 microns and YSZ with an average particle size of 0.3 microns, mix LSM and YSZ with ethanol as a medium for 24 hours, and then evaporate to remove ethanol medium to obtain LS...
Embodiment 2
[0037] Example 2: Preparation of a plate-shaped dense hollow fiber oxygen-permeable ceramic membrane element composed of 30 dense LSM-YSZ hollow fiber ceramic membranes with openings at both ends connected side by side
[0038] image 3 It is a schematic structural diagram of a plate-shaped dense LSM / YSZ hollow fiber ceramic membrane element with openings at both ends to be prepared in this example.
[0039] The concrete steps of adopting phase inversion method and sintering preparation are as follows:
[0040] The preparation method of LSM-YSZ mixed powder and slurry is basically the same as in Example 1, except that the solid content of the LSM-YSZ slurry prepared in this example is about 80%, that is, the batching of the slurry is: 80% LSM-YSZ powder, 0.5% polyethersulfone forming agent, 20% N-methylpyrrolidone organic solvent and 0.04% polyvinylpyrrolidone surfactant.
[0041] The extrusion and solidification process parameters of the LSM-YSZ hollow fiber ceramic membran...
Embodiment 3
[0047] Embodiment 3: preparation is made of multiple Ni-Ba(Zr 0.1 Ce 0.7 Y 0.2 )O 3-d (Hereinafter abbreviated as Ni-BZCY7) The hollow fiber ceramic membranes are connected in parallel and parallel to form a plate-shaped dense hollow fiber ceramic membrane element, which is used to assemble the hydrogen permeable membrane module.
[0048] 1. Weigh 60 grams of metal Ni powder with an average particle size of 5 microns, and 60 grams of BZCY7 powder with an average particle size of 1 micron, mix them by ball milling with ethanol as a medium for 24 hours, then evaporate the ethanol and dry.
[0049] 2. Weigh 75% Ni / BZCY7 mixed powder, 25% N-methylpyrrolidone (NMP) organic solvent, 0.05% polyvinylpyrrolidone (PVP) forming agent and 0.4% polyethersulfone ( PESf) Surfactant, ball milled for 48 hours and mixed to prepare slurry, vacuum degassed slurry for 1 to 2 hours.
[0050]3. The above-mentioned slurry after vacuum degassing was used to prepare a Ni-BZCY7 hollow fiber ceramic ...
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Abstract
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