High-efficiency low-temperature honeycomb type SCR denitration catalyst and preparation method thereof

A denitrification catalyst and honeycomb-type technology, applied in the field of denitrification catalysts, can solve the problem of catalyst NOx removal activity reduction, etc., and achieve the effects of easy large-scale industrial production, high removal rate, and simple process conditions

Pending Publication Date: 2021-10-01
SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Conventional denitrification SCR catalysts for coal-fired power plants are vanadium-titanium series, and their applicable temperature window is 300-420°C. Due to the influence of temperature drop and passivation of sulfur-containing components, the NOx removal activity of the catalyst is in the lower temperature range of 180-280°C. Significantly reduced

Method used

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  • High-efficiency low-temperature honeycomb type SCR denitration catalyst and preparation method thereof

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preparation example Construction

[0022] It can be understood that the present invention uses some embodiments in order to achieve the purpose of the present invention. The present invention provides a method for preparing a high-efficiency low-temperature honeycomb SCR denitration catalyst, comprising the following steps:

[0023] S1 In a temperature environment of 60-80°C, add carriers, active agents, active substances, compound additives, active agents, binders, lubricants, pore-forming agents and solvents and stir and mix in the reactor for 6-12 hours , the mixed mud material is obtained and extruded into a honeycomb mud billet;

[0024] The S2 honeycomb mud is dried at a temperature of 80-130°C for 8-24 hours to obtain a dried honeycomb mud;

[0025] S3 The dried honeycomb mud is roasted at a temperature of 550-600°C for 12-36 hours to obtain a high-efficiency low-temperature honeycomb SCR denitration catalyst;

[0026] Wherein the carrier is TiO in the step S1 2 , the coagent is WO 3 , the active subs...

Embodiment 1

[0032] This embodiment provides a method for preparing a high-efficiency low-temperature honeycomb SCR denitration catalyst, including the following steps:

[0033] S1 weighs the precursor material of the catalyst and weighs the carrier TiO 2 Powder 2000g, according to the carrier TiO in high-efficiency low-temperature honeycomb SCR denitration catalyst 1 2 , coagent WO 3 , active substance V 2 o 5 The weight ratio of 8:1:1 is reversed to calculate the carrier TiO in the precursor material of the corresponding catalyst 2 , coagent WO 3 and active substance V 2 o 5 weight, and on the carrier TiO 2 , coagent WO 3 and active substance V 2 o 5 Carry out calculation and weighing, and add cerium nitrate according to the molar ratio of V element and Ce element in the high-efficiency low-temperature honeycomb SCR denitration catalyst at a ratio of 1:0.2, calculate and weigh the appropriate proportion of binder, stearic acid, kapok and ammonia water ;

[0034] S2 Prepare th...

Embodiment 2

[0038] This embodiment provides a method for preparing a high-efficiency low-temperature honeycomb SCR denitration catalyst, including the following steps:

[0039] S1 weighs the precursor material of the catalyst and weighs the carrier TiO 2 Powder 2600g, according to the high-efficiency low-temperature honeycomb SCR denitration catalyst 2 carrier TiO 2 , coagent WO 3 , active substance V 2 o 5 The weight ratio of 8:1:1 is reversed to calculate the carrier TiO in the precursor material of the corresponding catalyst 2 , coagent WO 3 and active substance V 2 o 5 weight, and on the carrier TiO 2 , coagent WO 3 and active substance V 2 o 5 Carry out calculation and weighing, and add cobalt nitrate according to the molar ratio of V element and Co element in the high-efficiency low-temperature honeycomb SCR denitration catalyst at a ratio of 1:0.3, and calculate and weigh the binder, Stearic acid, kapok and ammonia;

[0040]S2 Prepare the mixed mud by weighing the precu...

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Abstract

The invention provides a high-efficiency low-temperature honeycomb type SCR denitration catalyst and a preparation method thereof. The preparation method includes the steps that precursor materials of the catalyst are completely mixed to obtain mixed pug, the mixed pug is sequentially subjected to extrusion molding, drying and roasting, and the efficient low-temperature honeycomb type SCR denitration catalyst is prepared; according to the present invention, the process conditions are simple, the high NOx removal rate can be achieved in the sulfur-containing waste gas environment at the low temperature range of 180-280 DEG C, and the large-scale industrial production is easily achieved.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a high-efficiency low-temperature honeycomb SCR denitration catalyst and a preparation method thereof. Background technique [0002] In the denitrification of domestic coal-fired power plant systems, SCR denitrification has been widely used as the mainstream technology for controlling NOx emissions in large coal-fired power plants. The applicable flue gas temperature of its core denitrification catalyst is 300-420 °C. In the exhaust gas environment of industrial boilers such as coking plants, cement plants, and glass factories, where the exhaust gas temperature is usually lower than 280 ° C, the application of conventional coal-fired SCR denitrification catalysts is affected by factors such as temperature and exhaust gas components, and the NOx removal activity is greatly affected. limit. With the increasingly stringent emission requirements of industrial waste gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/34B01J23/847B01J21/06B01J35/04B01D53/86B01D53/56B01D53/90
CPCB01J21/063B01J23/30B01J23/34B01J23/8472B01J35/04B01D53/8628B01D53/90B01D2257/404B01D2258/0283
Inventor 王凯王乐乐鲍强李乐田马云龙雷嗣远姚燕卿梦磊杨晓宁孔凡海卞子君何川张发捷王丽朋吴国勋李昂
Owner SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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