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Porous intermetallic compound-ceramic catalyst carrier and preparation thereof

A technology of intermetallic compounds and ceramic catalysts, applied in the direction of catalyst carriers, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of difficult quality control, large back pressure, high equipment cost, etc., and reduce thermal stress and thermal stress. Fatigue damage, beneficial to filter impurities and exhaust, and reduce production costs

Inactive Publication Date: 2010-09-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above invention patents have the following disadvantages: ① they are all pure intermetallic compound materials or ceramic materials, which are difficult to meet the high temperature strength, thermal shock resistance and mechanical vibration requirements of the carrier of automobile exhaust gas purifier; ② porous materials have low porosity, such as Increase the porosity, and the strength will be greatly reduced, so the back pressure will be large when the automobile exhaust passes through, and the catalytic conversion effect will be poor
③ Using electric spark or low-power laser beam to ignite self-propagating reaction, the success rate of synthesizing porous materials is low, and the quality is difficult to control. If high-power laser beam is used, the equipment cost is high and the maintenance cost is high

Method used

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  • Porous intermetallic compound-ceramic catalyst carrier and preparation thereof
  • Porous intermetallic compound-ceramic catalyst carrier and preparation thereof
  • Porous intermetallic compound-ceramic catalyst carrier and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare industrial pure Ni, Al, TiH 2 、Al 2 o 3 Powder, including: Ni, TiH 2 、Al 2 o 3 The particle size of the powder is 200 mesh, and the particle size of the Al powder is 100 mesh. The powder is sieved respectively, and the above powder is mixed according to: Ni: Al: TiH 2 :Al 2 o 3 =63.7%: 21.3%: 6.3%: 8.7% by mass ratio weighing and dry mixing, and then adding 4% absolute ethanol, wet mixing into mud. Using a compression molding method, the muddy mixture is made into a cylindrical compact with a diameter of Φ50 mm and a height of 100 mm. Dry the pressed embryos at 100°C for 4-8 hours to completely evaporate the ethanol. Then put the compact into a heating furnace at 300°C, and preheat for 0.5 hour. Turn on the plasma beam ignition device, adjust the plasma beam current to 100A, voltage to 40V, and beam column diameter to Φ5mm. Use plasma beam to initiate self-propagating high-temperature synthesis reaction, and NiAl+NiTi+TiAl / Al can be obtained after the ...

Embodiment 2

[0042] According to the ratio of raw materials: Ni: Al: TiH 2 :Al 2 o 3 =56.2%: 18.7%: 11.7%: 13.4% mass ratio weighing dry mixing, adding 6% absolute ethanol wet mixing into mud, other processes are the same as in Example 1. The performance of the obtained product is shown in Table 2.

[0043] Table 2

[0044]

Embodiment 3

[0046] Change the ratio of raw materials to Ni:Al:TiH 2 : Al 2 o 3 =48.6%: 16.2%: 16.7%: 18.5% mass ratio weighing dry mixing, adding 9% dehydrated alcohol wet mixing into mud, other processes are the same as in Example 1. The properties of the obtained product are shown in Table 3.

[0047] table 3

[0048]

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Abstract

The invention discloses a porous intermetallic compound-ceramic catalyst carrier taking Ni, Al, TiH2, Al2O3 powders as raw materials, adding ethanol to mix in a wet method. The intermetallic compound-ceramic catalyst carrier is a composite material distributed with TiO2 and Al2O3 grains in a substrate composed of NiAl, NiTi and TiAl intermetallic compounds that are formed by self-propagating hightemperature synthesis reaction. The porous catalyst carrier is mainly used in tail gas purifier of automobile, sewage filtering purifier or heat exchanger of mining and metals.

Description

technical field [0001] The invention relates to a catalyst carrier and a preparation method thereof, in particular to a catalyst carrier used for an internal combustion engine tail gas purifier or filter material and a preparation method thereof, and belongs to the field of material synthesis and processing. Background technique [0002] Automobile exhaust purifier is the control unit of automobile exhaust emission, and its performance directly determines the filtering effect of exhaust gas. The three-way catalyst plays the role of purification in the purifier, and the catalyst is attached to various supports. The performance and form of the support directly affect the catalytic conversion effect. Therefore, the catalyst carrier is a key component of the automobile exhaust gas purifier. [0003] At present, the carrier of automobile rear purifier is mainly ceramic and metal. The ceramic carrier has good thermal stability, but is brittle and is often broken due to severe vib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/04B01D53/94
Inventor 崔洪芝吴杰
Owner SHANDONG UNIV OF SCI & TECH
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