Vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and preparation method thereof

An SCR catalyst, extrusion technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc.

Inactive Publication Date: 2017-04-26
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

Therefore, extruded SCR catalysts for vehicles have higher requirements than those for stationary source extruded SCR catalysts. At present, domestic researchers are still in the initial stage of research on extruded SCR catalysts for vehicles.

Method used

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  • Vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and preparation method thereof
  • Vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of the catalyst precursor, ammonium metavanadate and oxalic acid were dissolved in deionized water at a molar ratio of 1:1, stirred with a mechanical stirrer, and dissolved completely at room temperature to prepare a catalyst precursor solution, the concentration 20%;

[0020] (2) Weigh 100 parts of titanium tungsten powder, 2 parts of hydroxypropyl methylcellulose, 1 part of polyethylene oxide, 2 parts of oleic acid, 1 part of chemical fiber, and 2 parts of gamma alumina, and add them to the kneader, Knead for 10-50 minutes to mix the raw materials evenly, then add 2 parts of ethylene glycol, 2 parts of lactic acid, 15 parts of catalyst precursor solution, 2 parts of ethanolamine, 2 parts of γ-alumina, 1 part of silica sol, and 4 parts of ammonia water, respectively Slowly add to the mud, and add 16 parts of deionized water, knead for 20-120min, and stale for 10-30h after kneading;

[0021] (3) Put the above-mentioned stale mud material in a vacuum mud...

Embodiment 2

[0025] (1) Preparation of the catalyst precursor, ammonium metavanadate and oxalic acid were dissolved in deionized water at a molar ratio of 1:1, stirred with a mechanical stirrer, and dissolved completely at room temperature to prepare a catalyst precursor solution, the concentration 20%;

[0026] (2) Weigh 100 parts of titanium tungsten powder, 7 parts of hydroxypropyl methylcellulose, 5 parts of polyethylene oxide, 5 parts of oleic acid, 7 parts of chemical fiber, and 10 parts of γ-alumina into the kneader, and knead for 10- 50min, mix the raw materials evenly, then slowly add 10 parts of ethylene glycol, 5 parts of lactic acid, 35 parts of catalyst precursor solution, 6 parts of ethanolamine, 10 parts of γ-alumina, 5 parts of silica sol, and 10 parts of ammonia water into the mud respectively , and add 1 part of deionized water, knead for 20-120min, and stale for 10-30h after kneading is completed;

[0027] (3) Put the above-mentioned obsolete mud material in a vacuum mu...

Embodiment 3

[0031] (1) Preparation of the catalyst precursor, ammonium metavanadate and oxalic acid were dissolved in deionized water at a molar ratio of 1:1, stirred with a mechanical stirrer, and dissolved completely at room temperature to prepare a catalyst precursor solution, the concentration 20%;

[0032] (2) Weigh 100 parts of titanium tungsten powder, 3 parts of hydroxypropyl methylcellulose, 2 parts of polyethylene oxide, 3 parts of oleic acid, 2 parts of chemical fiber, and 3 parts of γ-alumina and add them to the kneader, and knead for 10- 50min, mix the raw materials evenly, then slowly add 3 parts of ethylene glycol, 3 parts of lactic acid, 30 parts of catalyst precursor solution, 3 parts of ethanolamine, 3 parts of γ-alumina, 2 parts of silica sol, and 5 parts of ammonia water into the mud respectively , and add 4 parts of deionized water, knead for 20-120min, stale for 10-30h after kneading;

[0033] (3) Put the above-mentioned stale mud material in a vacuum mud refining m...

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Abstract

For solving the problem of NOx removal of motor vehicle exhaust emission, the invention discloses a vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and a preparation method thereof. The denitration catalyst is prepared with titanium tungsten powder as a main raw material with addition of hydroxypropyl methyl cellulose, polyoxyethylene, oleic acid, chemical fibers, [gamma]-aluminum oxide, ethylene glycol, lactic acid, a catalyst precursor solution, ethanol amine, [gamma]-aluminum oxide, silica sol, ammonium water and deionized water. The preparation method includes the steps of kneading the components, pugging the mixture, aging the mixture, performing extrusive shaping, and drying and sintering the mixture to produce the honeycomb-like extrusive-type SCR denitration catalyst. The catalyst has high catalytic activity, high mesh number and high mechanical strength.

Description

technical field [0001] The invention relates to a catalyst, in particular to an extruded SCR denitrification catalyst used for automobile tail gas treatment and a preparation method thereof. Background technique [0002] With the sustained and stable growth of the national economy, the development of my country's automobile industry is optimistic, and the sales of automobiles continue to grow every year. With the continuous increase of the total number of automobiles in the country, the problem of automobile exhaust pollution is becoming more and more serious. The nitrogen oxides contained in it and the nitrogen in the air The combination of water can form acid rain, and these nitrogen oxides can also react with hydrocarbons under light conditions to form photochemical smog, so the emission of nitrogen oxides is extremely harmful to the environment. [0003] In the 1950s, the Americans proposed the SCR denitrification technology and applied for a patent. In the 1970s, the Jap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/00B01D53/94B01D53/56
CPCB01D53/9418B01J23/22B01J37/00Y02T10/12Y02A50/20
Inventor 许顺磊朱增赞孙敏詹望成赵磊冯峰王超卢冠忠郭晓会
Owner 凯龙蓝烽新材料科技有限公司
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