Extrusion-type molecular-sieve denitration catalyst based on copper-iron mixing and preparation method of molecular-sieve denitration catalyst

A denitration catalyst, molecular sieve technology, applied in molecular sieve catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of insufficient molecular sieve and carrier firmness, low molecular sieve catalyst loading, harsh preparation process conditions, etc. The effect of high temperature activity, reducing production cost and avoiding pore blocking problem

Inactive Publication Date: 2018-07-13
凯龙蓝烽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has problems such as low molecular sieve catalyst loading, easy plugging, harsh preparation process conditions, uneven coverage of molecular sieves on the cordierite surface, and insufficient bonding of molecular sieves and carriers.

Method used

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  • Extrusion-type molecular-sieve denitration catalyst based on copper-iron mixing and preparation method of molecular-sieve denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The extruded copper-iron mixed-base molecular sieve denitration catalyst for automobile exhaust gas treatment provided by the invention, the preparation method thereof comprises the following steps:

[0024] Weigh the following components by weight according to the following proportions: 100 parts of SSZ-13, 7 parts of talc, 2 parts of washed kaolin, 6 parts of calcined kaolin, 1 part of hydroxypropyl methylcellulose, polyethylene oxide (molecular weight is 5×10 5 ) 1 part, 4 parts of polyethylene glycol (PEG-400), 3 parts of lactic acid, 2 parts of stearic acid, 1 part of glass fiber (length-diameter ratio of 3~6:1), ferrous chloride (as per iron oxide) The amount of copper oxide is calculated as 1 part), copper nitrate (calculated as 1 part according to the amount of copper oxide).

[0025] (1) adding SSZ-13 molecular sieve, talc, water-washed kaolin, calcined kaolin into the mixer and mixing uniformly;

[0026] (2) then add hydroxypropyl methylcellulose, polyethyle...

Embodiment 2

[0035] The extruded copper-iron mixed-base molecular sieve denitration catalyst for automobile exhaust gas treatment provided by the invention, the preparation method thereof comprises the following steps:

[0036] Weigh out the following components in parts by weight according to the following proportions: 50 parts of ZSM-50 parts, 50 parts of SSZ-13, 15 parts of talc, 6 parts of washed kaolin, 13 parts of calcined kaolin, 5 parts of hydroxypropyl methylcellulose, Ethylene oxide (molecular weight 5×10 5 ) 3 parts, 6 parts of polyethylene glycol (PEG-400), 5 parts of lactic acid, 5 parts of stearic acid, 5 parts of glass fiber (length-diameter ratio of 3-6:1), ferrous chloride (as per iron oxide) The amount of copper oxide is calculated as 4 parts), copper acetate (calculated as 4 parts according to the amount of copper oxide).

[0037] (1) adding ZSM-50 and SSZ-13 molecular sieves, talc, water-washed kaolin, and calcined kaolin into the mixer to mix uniformly;

[0038] (2) ...

Embodiment 3

[0047] The extruded copper-iron mixed-base molecular sieve denitration catalyst for automobile exhaust gas treatment provided by the invention, the preparation method thereof comprises the following steps:

[0048] Weigh each component of the following parts by weight according to the following proportions: 100 parts of SSZ-13, 10 parts of talc, 5 parts of washed kaolin, 10 parts of calcined kaolin, 3 parts of hydroxypropyl methylcellulose, polyethylene oxide (molecular weight is 5×10 5 ) 2 parts, 5 parts of polyethylene glycol (PEG-400), 4 parts of lactic acid, 4 parts of stearic acid, 3 parts of glass fiber (length-diameter ratio of 3-6:1), ferrous chloride (by iron oxide) The amount of copper oxide is calculated as 2 parts), copper acetate (calculated as 3 parts according to the amount of copper oxide).

[0049] (1) adding SSZ-13 molecular sieve, talc, water-washed kaolin, calcined kaolin into the mixer and mixing uniformly;

[0050] (2) then add hydroxypropyl methylcellu...

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Abstract

The invention discloses an extrusion-type molecular-sieve denitration catalyst based on copper-iron mixing and a preparation method of the molecular-sieve denitration catalyst. The preparation methodcomprises the following steps: (1) uniformly mixing a molecular sieve, talc, water-washed kaolin and calcined kaolin, then adding hydroxypropyl methyl cellulose, polyoxyethylene, stearic acid and glass fibers, and carrying out uniform mixing to obtain mixed powder; and (2) adding polyethylene glycol, lactic acid, a copper source, an iron source and deionized water into the mixed powder obtained inthe step (1), carrying out mixing, and sequentially carrying out kneading, aging, pugging, extruding, drying and calcining to obtain the extrusion-type molecular-sieve denitration catalyst based on copper-iron mixing. The preparation method provided by the invention has simple process and low production cost, and the prepared extrusion-type catalyst based on copper-iron mixing has the characteristics that the low-temperature activity and the high-temperature activity of the catalyst are improved simultaneously.

Description

technical field [0001] The invention belongs to the technical field of denitration catalyst preparation, in particular to an extruded copper-iron mixed-base molecular sieve denitration catalyst for automobile exhaust treatment and a preparation method thereof. Background technique [0002] Coal and petroleum are the main energy sources in my country, and a large amount of sulfur dioxide (SO2) will be produced when burning. 2 ), nitrogen oxides (NO x ) and harmful components such as dust. Among them, nitrogen oxides (NO x ) as one of the main pollutants, its emission is not only harmful to human health, but also causes serious environmental problems such as the ozone layer hole, acid rain, greenhouse effect and photochemical smog, so the effective control of NO x The emission of air pollution is an important air pollution problem that needs to be solved urgently in my country in the near future. [0003] In recent years, Selective Catalytic Reduction (SCR) is the removal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/80B01J29/46B01J29/85B01D53/94B01D53/56
CPCB01J29/76B01D53/9418B01J29/46B01J29/80B01J29/85B01J2229/18
Inventor 许顺磊朱增赞孙敏汪银环郭耘詹望成徐欢李杰郭晓会赵磊
Owner 凯龙蓝烽新材料科技有限公司
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