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A novel ceramic membrane tube with catalytic function and its preparation method

A ceramic membrane tube and functional technology, applied in chemical instruments and methods, separation methods, catalysts for physical/chemical processes, etc., can solve problems such as inability to replace catalysts as needed, shortening the service life of membrane tubes, and decreasing catalytic function of membrane tubes, etc. Achieving the effects of simple and controllable preparation method, extended service life and low cost

Active Publication Date: 2019-09-20
江苏省陶瓷研究所有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this type of ceramic membrane tube with catalytic function is that, on the one hand, the preparation process is relatively complicated; on the other hand, because the catalyst is loaded on the ceramic membrane, the catalyst cannot be replaced as needed; Regeneration, the catalytic function of the membrane tube decreases, reducing the service life of the membrane tube

Method used

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  • A novel ceramic membrane tube with catalytic function and its preparation method

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Effect test

Embodiment 1

[0031] Embodiment 1: A new type of ceramic membrane tube with catalytic function, including a support body 1 with an open end, a separation membrane 2 coated on the surface of the support body 1, a catalytic cotton 3 filled in the inner cavity of the support body 1, and a sealing The honeycomb ceramic baffle plate 4 used to block and compress the catalytic cotton 3 at the opening of the support body 1 . The ceramic filter tube support body 1 has a porosity of 30%~45%, and a bending strength of ≥18MPa. The average pore diameter of the separation membrane 2 is 1-20 μm. The honeycomb ceramic baffle 4 is made of cordierite, the shape is hexagonal, and the number of holes is 5~20 / cm 2 , The thickness of the honeycomb ceramic baffle plate 4 is 1~2cm.

Embodiment 2

[0033] The catalytic function ceramic membrane tube of the present invention and preparation method thereof comprise the following steps:

[0034] 1. Preparation of ceramic membrane tube support body.

[0035] 1.1 Weigh 84.5wt% of silicon carbide powder with a fineness of 60 mesh, 3.0wt% of Suzhou soil powder with a fineness of 250 mesh, 3.0wt% of silicon micropowder with a fineness of 250 mesh, 1.5wt% of talcum powder with a fineness of 250 mesh, and 4.0wt% of wood chips with a fineness of 250 mesh % and a concentration of 10wt% PVA solution 4.0wt%, mixed and granulated to make a dry-pressed billet.

[0036] 1.2 After the dry-pressed blank is isostatically pressed under 35MPa pressure, it is dried in an oven at 80°C for 16 hours, and then the dried membrane tube body is fired in a kiln, and the temperature is raised to 1.5°C / min. 1350°C, and kept at the highest temperature for 3 hours, then cooled to room temperature with the furnace to obtain a ceramic membrane tube support...

Embodiment 3

[0054] The catalytic function ceramic membrane tube of the present invention and preparation method thereof comprise the following steps:

[0055] 2. Preparation of ceramic membrane tube support body.

[0056] 1.1 Weigh 82.5wt% of silicon carbide powder with a fineness of 100 mesh, 4.0wt% of Suzhou soil powder with a fineness of 250 mesh, 4.0% of silicon micropowder with a fineness of 250 mesh, 2.0wt% of talcum powder with a fineness of 250 mesh, and wood chips with a fineness of 100 mesh 2.0wt% and 5.5wt% PVA solution with a concentration of 10wt% were mixed and granulated to obtain a dry-pressed billet.

[0057] 1.2 After the dry-pressed billet is isostatically pressed under 50MPa pressure, it is dried in an oven at 70°C for 24 hours, and then the dried membrane tube body is fired in a kiln, and the temperature is raised to 0.5°C / min. 1320°C, and kept at the highest temperature for 5 hours, then cooled to room temperature with the furnace to obtain a ceramic membrane tube s...

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Abstract

A new type of ceramic membrane tube with catalytic function and a preparation method thereof, which includes a support body with one end open, a separation membrane coated on the surface of the support body, catalytic cotton filled in the internal cavity of the support body, and a catalytic cotton sealed at the opening of the support body. Honeycomb ceramic baffle used to block pressed catalytic wool. The advantages of the present invention are that the method is novel and simple to implement, maintains the original structure and filtering function of the membrane tube, increases the catalytic function of the membrane tube, increases the contact area between the catalytically active component and the pre-filtered gas, and enhances the efficiency of catalytic purification. Effect, and because the catalyst and membrane tube can be separated, the catalytic components of the ceramic membrane tube can be replaced or reprocessed after being used for a period of time, which extends the service life of the membrane tube and reduces the cost of use.

Description

technical field [0001] The invention belongs to the field of chemical ceramics, in particular to a ceramic membrane tube and a preparation method thereof. Background technique [0002] At present, the situation of my country's atmospheric environment is very severe. The energy structure dominated by coal combustion leads to the characteristics of soot pollution. The main pollutants are dust particles and nitrogen oxides. It will cause great harm to human health and environmental quality, and seriously restrict the sustainable development of social economy. Therefore, it is necessary to carry out dust removal and denitrification treatment on the flue gas. The dust removal and denitrification technologies commonly used in power plants are divided into two independent steps, first dust removal and then denitrification or first denitrification and then dust removal. One of the commonly used technologies for denitrification is the ammonia selective catalytic reduction method. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/06B01D53/90B01D53/86B01D53/56B01D46/54B01D69/10B01D67/00B01D71/02
CPCB01D46/543B01D53/8628B01D53/90B01D67/0039B01D69/10B01D71/02B01D71/025B01J23/8892B01J35/58
Inventor 伦文山徐泽跃彭文博沈云进
Owner 江苏省陶瓷研究所有限公司
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