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Method for preparing monolith catalyst

A monolithic catalyst, catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc. The effect of reducing investment costs, realizing economic benefits, and stabilizing long-term economic benefits

Inactive Publication Date: 2016-11-09
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of extrusion molding or coating molding technology, the construction of a complete catalyst production line usually requires an investment of tens of millions or even hundreds of millions of yuan. The operating costs during the production process are high and the process is complicated, which is not suitable for small-scale production.

Method used

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  • Method for preparing monolith catalyst
  • Method for preparing monolith catalyst

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Experimental program
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Effect test

Embodiment 1

[0062] After preparing a mixed solution with oxalic acid as co-solvent, ammonium metavanadate as vanadium source and ammonium tungstate as tungsten source, add TiO 2 The powder is used as a carrier, and it is fully stirred for more than 1 hour, then the mixed solution is rotary evaporated until the water is fully volatilized, and dried in an air atmosphere at 100°C for 12 hours, and finally roasted in an air atmosphere at 550°C for 3 hours to obtain a load of 4.5wt%V 2 o 5 and 10wt% WO 3 V 2 o 5 -WO 3 / TiO 2 Catalyst, referred to as Catalyst A.

Embodiment 2

[0064] After preparing ammonium metavanadate solution with oxalic acid as co-solvent, add WO 3 Content is 10wt% titanium tungsten powder (10% WO 3 -TiO 2 powder) as a carrier, fully stirred for more than 1 hour, and then the mixed solution was rotatably evaporated until the water was fully volatilized, dried at 100°C for 12 hours, and finally roasted at 550°C for 3 hours to obtain 3% V 2 o 5 / 10% WO 3 -TiO 2 Catalyst, referred to as Catalyst B.

Embodiment 3

[0066] After preparing ammonium metavanadate solution with oxalic acid as co-solvent, add WO 3 Content is 5wt% titanium tungsten powder (5% WO 3 -TiO 2 Powder) as a carrier, fully stirred for more than 1h, then dried the mixed solution in an air atmosphere at 100°C until the water was fully volatilized, and finally roasted in an air atmosphere at 500°C for 3h to obtain 3.5% V 2 o 5 / 5% WO 3 -TiO 2 Catalyst, referred to as Catalyst C.

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Abstract

The invention provides a method for preparing a monolith catalyst. The method includes the following steps that firstly, catalyst powder is mixed with an adhesive, surfactant and a solvent to obtain slurry; secondly, a carrier is washed with water and dried to obtain a preprocessed carrier; thirdly, the carrier is soaked in the slurry and taken out, and the slurry in channels of the carrier is blown out by means of compressed air; fourthly, the carrier obtained in the third step is dried and baked, and the monolith catalyst is obtained. The monolith catalyst produced through the method is good in catalytic activity, investment cost for catalyst industrial production can be greatly reduced, investment is only 5-10% that of a complete production line under the same productivity condition, and the method can be used for preparing monolith catalysts of different types, particularly SCR monolith catalysts.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a method for preparing a monolithic catalyst, in particular to a method for preparing an SCR monolithic catalyst. Background technique [0002] Nitrogen oxides (NOx) mainly include NO and NO 2 , is an important pollutant in the atmosphere. NOx can generate secondary particulate matter through atmospheric chemical reactions, thereby greatly increasing the occurrence probability of smog. At the same time, NOx can also cause major environmental problems such as acid rain and photochemical smog, and can cause direct harm to the human body. [0003] During the "Eleventh Five-Year Plan" period, my country implemented binding emission reduction measures for sulfur dioxide, one of the main components of acid rain, and achieved remarkable results. However, total NOx emissions are on the rise. Therefore, the country has clearly stipulated the NOx emission reduction targets for the "Twe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
CPCB01J23/30B01D53/8628B01D2251/2062B01D2251/2067B01D2258/01B01D2258/012B01D2258/0283B01J23/002B01J2523/00B01J2523/55B01J2523/69B01J2523/47B01J2523/31B01J2523/41
Inventor 贺泓单文坡连志华邓华
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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