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Porous catalytic filtering metal material and its prepn

A catalytic filtration, metal porous technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, filtration and separation, etc., can solve the problems of increased catalyst cost, complex catalyst preparation, low thermal shock resistance, etc., and achieve active component distribution Uniform, low cost, high porosity effect

Active Publication Date: 2006-05-17
AT&M ENVIRONMENTAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the flue gas purification methods disclosed in the above patents, inorganic oxides are mostly used as carriers, and a variety of oxide catalysts are used to improve the activity of the catalysts, so as to simultaneously remove nitrogen oxides and sulfur oxides in the flue gas. purpose, making the preparation of the catalyst complicated and also increasing the cost of the catalyst
In addition, in the above-mentioned patents, due to the use of oxides as the catalyst carrier, there are problems of poor thermal conductivity and low thermal shock resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] with Fe 3 Al alloy is used as the base material, and Fe is prepared by conventional powder metallurgy method. 3 Al metal porous material, the Fe 3 The porosity of the Al metal porous material is 33%, the average pore diameter is 10 μm, and the shape is a disc with a size of φ14×2.0 mm, and Fe 3 The Al metal porous material disc is used as a substrate, first soaked and washed with hexane, then soaked and washed with absolute ethanol after taking it out, and dried for use.

[0037] After soaking, washing and drying, the Fe 3 Al metal porous material wafers are pretreated, and the pretreatment liquid is CrO 3 solution, the process conditions are: CrO 3 The concentration of the solution is 400g / L, the treatment temperature is 80°C, and the treatment time is 8min, and it is taken out and dried for later use.

[0038] The pretreated Fe 3 The Al metal porous material disk was immersed in the prepared alumina sol, and after immersion for 1 hour, it was taken out to dry at...

Embodiment 2

[0044] Using 316L stainless steel as the base material, the 316L stainless steel porous metal material is prepared by conventional powder metallurgy method. The porosity of the 316L stainless steel porous metal material is 38%, and the average pore diameter is 40 μm. It is made into a tubular element with a size of φ30× 200mm, wall thickness 4mm, with 316L stainless steel porous metal tubular element as the substrate, soak and wash with hexane first, then soak and wash with absolute ethanol after taking it out, and dry it before use.

[0045] Pretreat the 316L stainless steel porous metal material tubular elements after soaking, washing and drying. The pretreatment solution is NaOH strong alkaline oxidation solution. The process conditions are: the concentration of NaOH strong alkaline oxidation solution is 600g / L, The treatment temperature is 140°C, and the treatment time is 30 minutes. Take it out and dry it for later use.

[0046] Immerse the pretreated 316L stainless steel...

Embodiment 3

[0052] Using stainless steel 310S as the base material, the stainless steel 310S metal porous material is prepared by conventional methods. The porosity of the stainless steel 310S metal porous material is 40%, and the average pore diameter is 20 μm. The thickness is 4mm, and the stainless steel 310S metal porous material pipe fittings are used as the substrate, soaked and washed with hexane first, then soaked and washed with absolute ethanol after taking it out, and dried before use.

[0053] Pretreat stainless steel 310S metal porous material pipe fittings after soaking, washing and drying, and the pretreatment liquid is KMnO 4 solution, the process conditions are: KMnO 4 The concentration of the solution is 300g / L, the treatment temperature is 100°C, and the treatment time is 19min. Take it out and dry it for later use.

[0054] The pretreated stainless steel 310S metal porous pipe fittings were immersed in the prepared alumina sol, and after immersion for 1 hour, they wer...

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Abstract

The present invention belongs to the field of powder metallurgical product, and is gas catalyzing and filtering material and its preparation process. The porous catalyzing and filtering metal material consists of porous metal or alloy matrix, middle transition layer and active component. Its preparation process includes preparing porous metal or alloy matrix, preparing middle transition layer and supporting active component. The porous catalyzing and filtering metal material with porous metal as carrier and transition metal oxide as active component has excellent features of low density, great specific surface area, high porosity, high heat conductivity, etc. as well as homogeneous distribution of active component, fast supporting, high catalytic activity and high heat stability. It has simple preparation process, low cost and easy industrial application, and is suitable for high temperature gas and fume purification.

Description

technical field [0001] The invention belongs to the field of powder metallurgy products and catalytic materials, and relates to a catalytic filter material and a preparation method thereof. Background technique [0002] The catalytic filter material is formed by attaching catalytic active components to the porous filter material or element. It fully embodies the structural characteristics and catalytic characteristics of the porous material. Harmful components such as NO X , VOC (Volatile Organic Compounds), hydrocarbons, coke, etc. are catalytically converted to realize the integration of filtration and purification, which can simplify the process, greatly reduce equipment investment, improve energy utilization and save space. [0003] CN1476929 discloses a kind of 2 o 6 A denitrification catalyst as a carrier and a preparation method thereof. The method is CeTi 2 o 6 The compound is used as the catalyst carrier, and then the CeTi 2 o 6 The denitrification catalyst ...

Claims

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Application Information

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IPC IPC(8): B01J35/10B01D39/20B01J32/00B01J37/025B22F3/11
Inventor 方玉诚况春江邢毅杨军军郭辉进程海珊申新华王凡顾临杨东海
Owner AT&M ENVIRONMENTAL ENG TECH CO LTD
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