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A kind of high porosity and high permeability nb2o5 ceramic membrane and preparation method thereof

A high-permeability, high-porosity technology, used in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problem of catalyst incompatibility, catalytic conversion efficiency, narrow pore size distribution, high permeability, and wide pore size distribution. and other problems, to achieve the effect of improving membrane treatment effect, easy control of pore structure and pore size, and good compatibility

Inactive Publication Date: 2016-03-30
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a kind of Nb with high porosity, narrow pore size distribution range, high permeability and high mechanical strength. 2 o 5 Ceramic membranes to solve the existing ceramic membranes made of alumina, cordierite and mullite with low porosity, wide pore size distribution range, poor chemical stability, incompatibility with catalysts and problems in wastewater and exhaust gas purification treatment. The problem of low catalytic conversion efficiency

Method used

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  • A kind of high porosity and high permeability nb2o5 ceramic membrane and preparation method thereof
  • A kind of high porosity and high permeability nb2o5 ceramic membrane and preparation method thereof
  • A kind of high porosity and high permeability nb2o5 ceramic membrane and preparation method thereof

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Embodiment 1

[0040] 1. A kind of high porosity and high permeability Nb in this embodiment 2 o 5 The ceramic membrane is composed of a support body and a separation membrane layer. Ta of support body and separation membrane layer 2 o 5 and TiO 2 The contents are respectively 15mol% and 4mol%, that is, the general formula is Nb 1.62 Ta 0.3 Ti 0.04 o 5-δ .

[0041] 2. The above-mentioned high porosity and high permeability Nb in this embodiment 2 o 5 The preparation method of ceramic film, its step is as follows:

[0042] (1) Preparation of support body

[0043] (1-1) with Nb 2 o 5 Powder, Ta 2 o 5 Powder and TiO 2 powder as raw material, where Nb 2 o 5 The particle size of powder is 1~100μm, Ta 2 o 5 Powder particle size ≤ 1μm, TiO 2 The particle size of the powder is less than or equal to 0.3 μm; batching is carried out according to the above-mentioned general formula of the support body, and then the yttrium oxide stabilized zirconia ball (TZP ball) is used as the gri...

Embodiment 2

[0053] 1. A kind of high porosity and high permeability Nb in this embodiment 2 o 5 Ceramic membrane, its composition is the same as embodiment one.

[0054] 2. The above-mentioned high porosity and high permeability Nb in this embodiment 2 o 5 The preparation method of ceramic film, its step is as follows:

[0055] (1) Preparation of support body

[0056] (1-1) The preparation of the support body mixed powder is the same as in Example 1;

[0057] (1-2) The support body adopts extrusion molding method, and the composition of its green body is as follows: support body mixed powder 70wt%, hydroxypropyl cellulose 6wt%, glycerin 2wt%, oleic acid 2wt%, water 20wt%, mix After homogeneity, the mud is vacuum smelted, and it is placed in an airtight container to stale for more than 24 hours for later use; it is extruded by an extrusion molding machine to obtain 19-channel Nb 2 o 5 The ceramic membrane support body was wet, dried at room temperature for 24 hours, and then dried a...

Embodiment 3

[0066] 1. A kind of high porosity and high permeability Nb in this embodiment 2 o 5 The ceramic membrane is composed of a support body and a separation membrane layer. Ta of support body and separation membrane layer 2 o 5 and TiO 2 The contents are respectively 25mol% and 6mol%, that is, the general formula is Nb 1.38 Ta 0.5 Ti 0.06 o 5-δ .

[0067] 2. The above-mentioned high porosity and high permeability Nb in this embodiment 2 o 5 The preparation method of ceramic film, its step is as follows:

[0068] (1) Preparation of support body

[0069] (1-1) with Nb 2 o 5 Powder, Ta 2 o 5 Powder and TiO 2 powder as raw material, where Nb 2 o 5 The particle size of powder is 1~100μm, Ta 2 o 5 Powder particle size ≤ 1μm, TiO 2 The particle size of the powder is less than or equal to 0.3 μm; batching is carried out according to the above-mentioned general formula of the support body, and then the yttrium oxide stabilized zirconia ball (TZP ball) is used as the gri...

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Abstract

The invention discloses a high-porosity high-permeability Nb2O5 ceramic membrane which is represented by the following general formula: Nb(2-2x-2y)Ta2xTiyO(5-delta), wherein x and y represents mole fractions, 0.1<=x<=0.3, and 0.02<=y<=0.07. Besides, the invention also discloses a preparation method of the high-porosity high-permeability Nb2O5 ceramic membrane. The Nb2O5 ceramic membrane disclosed by the invention simultaneously has high porosity, narrow pore size distribution range, high permeability, high mechanical strength and other performance, and effectively solves the problems that existing ceramic membranes made of aluminum oxide, cordierite, mullite and the like have performance defects, catalyst incompatibility and low catalytic conversion efficiency exist in waste water and waste gas purification treatment and so on, thus bringing major technical breakthrough to the ceramic membrane field, and being beneficial to promote application and development of fine filtration and separation technology in the fields of water treatment, food, medicine, chemical engineering and the like.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic ceramic materials, in particular to a kind of Nb 2 o 5 Ceramic membrane and method for its preparation. Background technique [0002] Ceramic membranes have been widely used in the separation and catalytic reaction related processes involved in environmental protection, energy, petrochemical, food processing and metallurgy and other industrial fields. Ceramic membranes with a pore size of 0.05-1 μm can be used in wastewater and waste gas purification treatment, catalyst carriers, contact reactors and catalytic converters, etc., especially in various industrial wastewater treatment applications. Pollution and air pollution issues such as PM2.5 and acid rain play an important role. [0003] In applications such as ceramic membrane wastewater and waste gas purification, the separation and catalytic processes are often coupled together to achieve the separation and degradation or con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02C04B35/495C04B35/622
Inventor 张小珍索帅峰江瑜华周健儿常启兵胡学兵
Owner JINGDEZHEN CERAMIC UNIV
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