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Catalyst support for preparing a catalyst for removal of nitrogen oxides and method for preparing thereof

A catalyst carrier and oxygen compound technology, applied in the field of catalyst carrier and its preparation, can solve the problems of difficulty in drying, unsuitability, and high cordierite price, and achieve the effects of excellent out-of-stock effect, reduced usage, and reduced cost.

Inactive Publication Date: 2015-12-09
许承柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, the selective reduction catalyst for removing nitrogen oxides usually uses active components covered (loaded) on a honeycomb carrier. The carrier mainly uses TiO2 (titanium dioxide), cordierite, etc., but TiO2 (titanium dioxide) is used in the preparation In the process, there is a certain difficulty in drying, and cordierite is not only expensive, but also very heavy, so it is considered unsuitable as a catalyst for supporting out-of-stock catalysts

Method used

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  • Catalyst support for preparing a catalyst for removal of nitrogen oxides and method for preparing thereof

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Experimental program
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Effect test

Embodiment 1

[0038] 80 kg of the waste shown in the above [Table 3], 20 kg of zeolite (JAPAN, NAGOYANITTOREN Raw Material Co., Ltd. product name: H-3), 3 kg of lignocellulose, 10 kg of kaolin series clay, and non-combustible lubricant (JAPAN, NAGOYACOL Ltd., M -3) and water, put it into an ordinary kneader (crusher) and grind it together to obtain clay for molding.

[0039] With the help of a screw extrusion molding machine, the obtained molding clay is directly extruded to prepare a honeycomb shaped body with a length of 150mm, a width of 150mm, a height of 150mm, a thickness of 0.7mm, and a gap of 4.0mm between the walls. After drying for 1 hour, it was fired at 550° C. for 4 hours to prepare a carrier with a honeycomb structure.

[0040] When the characteristics of the honeycomb structure carrier of the present invention prepared above were compared with a commonly used honeycomb carrier (anatase carrier), the results are shown in the following [Table 4].

[0041] Table 4

[0042] Dif...

Embodiment 2

[0047] Coordinate according to the same method as above , increase the water content, and after obtaining the muddy pottery clay, evenly cover the muddy pottery clay on a metal mesh with a mesh iron specification of 4P by a thickness of 0.3mm ( On the surface of length 15cm x width 15cm), after drying for 10 hours, it was fired at 500°C for 2 hours to prepare a flat catalyst carrier.

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Abstract

The present invention relates to a method for producing an alumina-based catalyst support which is appropriate for producing a selective catalytic reduction catalyst for removing nitrogen oxide by using discarded catalyst waste after high-cost catalyst active metal components are extracted (collected) from a waste catalyst discharged from a desulfurizing step in an oil refinery or the like. A support molded product, which is molded using molding clay produced by combining 20-50 parts by weight of zeolite with respect to 100 parts by weight of the catalyst waste, is dried and plasticized.

Description

technical field [0001] The invention relates to a catalyst carrier and a preparation method thereof, in particular to a catalyst carrier for preparing a selective reduction catalyst capable of removing nitrogen oxides by using catalyst waste and a preparation method thereof. Background technique [0002] The selective reduction catalyst that can remove nitrogen oxides is used to remove nitrogen oxides (NOx) contained in the exhaust gas produced by automobiles, thermal power plants, chemical factories, etc., and is used together with a reducing agent for selective catalytic reduction reactions An out-of-stock catalyst mainly uses oxides such as vanadium (V), tungsten (W), molybdenum (Mo), nickel (Ni), iron (Fe), copper (Cu), and the catalytic carrier mainly uses titanium dioxide (Titania). Aluminum (Alumina), silicon dioxide (Silica), zirconia (Zirconia), etc. The main active components of the depinning catalyst applied to this selective catalytic reduction reaction, such as...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/887
CPCB01J23/94B01J38/72B01J37/0009B01D53/8625B01J35/56B01J35/613B01J35/633B01J35/647
Inventor 许承柱
Owner 许承柱
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