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Denitrification catalyst and preparation method thereof

A denitration catalyst, copper oxide technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of poor denitration performance, poor water resistance, etc. Engineering cost and operating cost, denitrification performance and effect of improving water and sulfur resistance

Inactive Publication Date: 2019-08-16
江苏浩日朗环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a denitrification catalyst and its preparation method to solve the problems of poor denitrification performance, poor sulfur resistance and water resistance under low temperature conditions existing in the existing process scheme

Method used

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  • Denitrification catalyst and preparation method thereof
  • Denitrification catalyst and preparation method thereof
  • Denitrification catalyst and preparation method thereof

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preparation example Construction

[0035] The preparation method of the iron-titanium-based low-temperature denitration catalyst is to use the above solid solution as the matrix material, and at the same time add the matrix material, glass fiber, wood pulp, binder, silica, wollastonite, deionized water and ammonia water, etc. in sequence. The mass percentage is 50-65: 5-8: 1-5: 0.5-2: 3-5: 1-3: 20-30: 5-10, mixing, filtering, extruding, drying and roasting. The speed of mixing is 200-400r / min, the time is 4-6h, the pressure of filtration is 4-6MPa, the pressure of extrusion is 4-6MPa, the drying condition is 50-60℃, the drying time is 168-240h, and the calcination temperature is 450~550℃, the calcination time is 20~30h.

[0036] Since vanadium pentoxide, iron trioxide, copper oxide and titanium dioxide are combined in the form of ionic bonds, the solid solution prepared by this combination method is extremely stable, and the iron-titanium-based low-temperature denitrification catalyst used to prepare it can be ...

Embodiment 1

[0047] Catalyst specification 150mm×150mm×400mm, 4 holes / cm 2 , Fe 2 o 3 Mass concentration 2%, V 2 o 5 The mass concentration is 5.0%.

Embodiment 2

[0049] Catalyst specification 150mm×150mm×400mm, 4 holes / cm 2 , Fe 2 o 3 Mass concentration 3%, V 2 o 5 The mass concentration is 5.0%.

[0050] Refer to Tables 2-5 for the removal rates of pollutants in different embodiments.

[0051] Table 2 The removal rate of nitrogen oxides

[0052]

[0053]

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Abstract

The application discloses a denitrification catalyst. The catalyst comprises titanium dioxide and vanadium pentoxide, and vanadium pentoxide is bonded with titanium dioxide in the form of ionic bonds.The invention also discloses a preparation method of the denitrification catalyst, and the method comprises the following steps: (1) synthesizing a solid solution containing vanadium pentoxide, tungsten trioxide, ferric oxide and copper oxide; (2) mixing the solid solution and auxiliary agents, and sequentially performing filtering, extruding, drying and roasting to obtain the denitrification catalyst. The denitrification performance and the water and sulfur resistance of the prepared iron-titanium-based low-temperature denitrification catalyst at low temperature conditions are greatly improved, the volume consumption is reduced, the flue gas temperature is not required to be risen during the operating process, and the engineering cost and the operating cost are reduced.

Description

technical field [0001] The application relates to a denitrification catalyst and a preparation method thereof, especially used in the field of denitrification of flue gas in coking plants. Background technique [0002] The characteristics of flue gas emission in coking plants are mainly low temperature, the temperature is generally 160-200°C, conventional normal temperature catalysts can no longer meet the requirements of low-temperature denitrification, and the working temperature of normal temperature denitrification catalysts is generally 300-420°C. [0003] At present, some scholars are developing low-temperature denitrification catalysts in the market, but due to the presence of sulfur compounds and water vapor in the flue gas, after the catalyst is used for a period of time, the accumulation of sulfate will cause the catalyst to be blocked, and the temperature of the flue gas cannot be increased. To about 350 ℃, carry out the regenerative sintering of sulfate, due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J35/02B01D53/86B01D53/56B01J35/00
CPCB01J23/002B01J23/8472B01D53/8628B01J2523/00B01D2258/0283B01D2251/2062B01J35/40B01J2523/17B01J2523/47B01J2523/55B01J2523/842
Inventor 施雅琼张现龙
Owner 江苏浩日朗环保科技有限公司
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