Ceramic-fiber-based catalyst carrier and preparing method thereof

A catalyst carrier, ceramic fiber technology, applied in catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of easy cracking of honeycomb ceramics, heavy honeycomb ceramics, small specific surface area of ​​carriers, etc., and achieve light weight. , Fast hot start, good for mass transfer and heat transfer

Inactive Publication Date: 2016-01-20
青岛纳博科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, honeycomb ceramics are heavy, and it is inconvenient to install and disassemble them in automobiles and other motor vehicles.
At the same time, honeycomb ceramics are prone to cracking under the conditions of repeated high temperature and low temperature environments
[0003] In order to solve the problem that the specific surface area of ​​the cordierite honeycomb ceramic carrier is small, it is reported in CN101138728A that nitric acid solution is used to pretreat the surface of the honeycomb ceramic. Although the specific surface area of ​​the catalyst carrier has been improved, soaking for a long time under strong acid and high temperature environment will The strength of cordierite honeycomb ceramics decreases, and the catalyst cannot run stably for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, the preparation method of the ceramic fiber-based catalyst carrier specifically includes the following steps:

[0032] Step 1, making paper by mixing 0.1 part of ceramic fiber, 80 parts of glass fiber, 10 part of synthetic fiber and 0.1 part of natural fiber;

[0033] Step 2. After papermaking, extrude it into a paper with a concave-convex surface. The obtained paper with a concave-convex surface is bonded to the flat paper through silica sol to form a layered body, and the layered body is stacked or wound into a honeycomb profile ;

[0034] Step 3: cutting the obtained profile into a desired shape, heating and removing part of the organic matter, including synthetic fibers, natural fibers and some organic binders, to obtain the catalyst carrier.

[0035] The catalyst carrier prepared in this embodiment has a porosity of 93% to 95%, and a heat-resistant temperature ≥ 600°C.

Embodiment 2

[0037] In this embodiment, the preparation method of the ceramic fiber-based catalyst carrier specifically includes the following steps:

[0038] Step 1, mixing 80 parts of ceramic fiber, 0.1 part of glass fiber, 10 parts of synthetic fiber and 10 parts of natural fiber to make paper;

[0039] Step 2. After papermaking, extrude it into a paper with a concave-convex surface. The paper with a concave-convex surface is bonded to the flat paper through aluminum sol to form a layered body, and the layered body is stacked or wound into a honeycomb profile ;

[0040] Step 3, cutting the obtained profile into a desired shape, heating to remove part of the organic matter therein, and obtaining the catalyst carrier.

[0041] The catalyst carrier prepared in this example has a porosity of 90-93%, and a heat-resistant temperature of ≥600°C.

Embodiment 3

[0043] In this embodiment, the preparation method of the ceramic fiber-based catalyst carrier specifically includes the following steps:

[0044] Step 1, mixing 80 parts of ceramic fiber, 80 parts of glass fiber, 0.1 part of synthetic fiber and 10 parts of natural fiber to make paper;

[0045] Step 2. After papermaking, extrude it into a paper with a concave-convex surface. The obtained paper with a concave-convex surface is bonded to the flat paper through silica sol to form a layered body, and the layered body is stacked or wound into a honeycomb profile ;

[0046] Step 3, cutting the obtained profile into a desired shape, heating to remove part of the organic matter therein, and obtaining the catalyst carrier.

[0047] The catalyst carrier prepared in this example has a porosity of 91-94%, and a heat-resistant temperature ≥ 600°C.

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Abstract

The invention discloses a ceramic-fiber-based catalyst carrier and a preparing method thereof and belongs to the technical field of preparation of catalyst carriers. The preparing method comprises the steps that firstly, a mixture of one or more ceramic fibers, glass fibers, synthetic fibers and natural fibers is selected for papermaking; secondly, the fibers are squeezed into paper with concave-convex faces after papermaking, the obtained paper with the concave-convex faces is bonded to flat paper through adhesive to form a layered body, and the layered body is stacked or coiled into a honeycomb profile; finally, the obtained profile is cut into a needed shape, part of organic matter in the profile is removed through heating, and the catalyst carrier is obtained. The prepared carrier is formed by interweaving fiber filaments, internal pores are developed, a coating with a high proportion and catalyst active components can be carried, the heat resisting temperature of the carrier is higher than or equal to 600 DEG C, a plurality of corrugated channels are distributed on the carrier, and the corrugated channels of the carrier facilitate mass transfer and heat conduction of waste gas.

Description

technical field [0001] The invention relates to the technical field of catalyst carrier preparation, in particular to a ceramic fiber-based catalyst carrier and a preparation method thereof. Background technique [0002] Honeycomb ceramics are often used as catalyst carriers. The advantages of the honeycomb structure are: (1) There are many restricted air channels, which not only provide a large contact area for the gas-solid catalytic reaction, but also make the pressure drop of the air flow smaller; (2) Low density and low heat capacity are beneficial to improve the light-off performance of the catalyst. Among them, the cordierite honeycomb ceramic carrier is the most commonly used honeycomb ceramic carrier. It has good chemical resistance and good heat resistance, and has a low expansion coefficient; combine together. At high temperature, due to the difference in heat resistance between the catalyst and the carrier, the catalyst is easy to detach. In addition, the hone...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/04B01J35/06
Inventor 郅立鹏段晓菲汪茂菊陈保磊冯晓杜月娟
Owner 青岛纳博科环保科技有限公司
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