Flue gas denitration multiporous organic catalyst and its preparation and using method

A technology of organic catalyst and denitrification reactor, which is applied in the field of flue gas denitrification porous organic catalyst and its preparation and application. It can solve the problems of no humic acid organic porous catalyst, etc., and achieve good energy saving effect, low cost and overcoming blockage.

Inactive Publication Date: 2008-03-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the materials of catalysts widely used in flue gas denitrification are mostly based on precious metals, etc., and there has been no report on the use of humic acid organic porous catalysts in the prior art.

Method used

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  • Flue gas denitration multiporous organic catalyst and its preparation and using method

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Experimental program
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Effect test

Embodiment 1

[0026] Take humic acid powder particles and TiO 2 , V 2 o 5 , polyurethane adhesive, water, according to the mass ratio of 8:4:4:1:3, stir and mix uniformly in a high mixer; then extrude through an extruder using a die to form a honeycomb porous body. The extruded honeycomb porous catalyst was dried in an oven at 150° C. for 3 h to consolidate it. The prepared catalyst is placed in a horizontal monomer denitration reactor. by NH 3 The amount that completely reacts with R-COOH is sprayed on the denitrification porous organic catalyst. Into the industrial boiler flue gas. In the denitration reactor device, the controlled reaction temperature is maintained at 50°C. Steady-state removal of NO under this operating condition x , The removal rate is 85%.

Embodiment 2

[0028] Take humic acid powder particles and TiO 2 , V 2 o 5 , polyurethane adhesive, and water, according to the mass ratio of 80:2:2:1:5, are stirred and mixed evenly in a high mixer; then extruded into a honeycomb porous body through an extruder using a die. The extruded honeycomb porous catalyst was dried in an oven at 150° C. for 3 h to consolidate it. Place the prepared catalyst in a horizontal monomer denitrification reactor, press NH 3 The amount that completely reacts with R-COOH is sprayed on the denitrification porous organic catalyst. Into the industrial boiler flue gas. In the denitrification reactor device, the controlled reaction temperature is maintained at 150°C. Steady-state removal of NO under this operating condition x , The removal rate is 90%.

Embodiment 3

[0030] Take humic acid powder particles and TiO 2 , V 2 o 5 , polyurethane adhesive, and water, according to the mass ratio of 18:4:4:1:3, are stirred and mixed evenly in a high mixer; then extruded into a honeycomb porous body through an extruder using a die. The extruded honeycomb porous catalyst was dried in an oven at 150° C. for 9 h to make it solidified. Place the prepared catalyst in a horizontal monomer denitrification reactor, press NH 3 The amount that completely reacts with R-COOH is sprayed on the denitrification porous organic catalyst. Into the industrial boiler flue gas. In the denitration reactor device, the controlled reaction temperature is maintained at 250°C. Steady-state removal of NO under this operating condition x , The removal rate is 85%.

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Abstract

The present invention discloses a flue gas denitration porous organic catalyst and a preparation and application method. The components of the catalyst and the weight percentage content include 40-80 percent of humic acid, 2-20 percent of TiO2< / SUB, 2-20 percent of V2O5, 1-5 percent of polyurethane adhesive and 5-15 percent of water. The preparation method is that the humic acid, the TiO2< / SUB, THE V2O5, the polyurethane adhesive and the water are evenly mixed. Then, the mixture is extruded to be a honeycomb porous body through an extruder, which adopts a mode joint. The mixture is consolidated after drying. The prepared porous organic catalyst is arranged in a flue gas governance reactor. Ammonia is sprayed in a flue gas inlet port of the reactor. The humic acid reacts to NH3 to generate humic acidic ammonium. Under the function of the flue gas waste heat, the humic acidic ammonium is dehydrated to be amidohumic acid. And the amidohumic acid can further reacts to NOx in the flue gas to generate N2 and the humic acid. The present invention can realize the flue gas efficient catalytic denitration.

Description

technical field [0001] The invention relates to a catalyst in the technical field of environmental protection, in particular to a porous organic catalyst for flue gas denitrification and its preparation and application method. Background technique [0002] According to reports, anthropogenic NO x More than 90% come from the combustion of fossil fuels (such as coal, oil, natural gas, etc.). my country is the largest coal producer and consumer. In recent years, NO x Emissions are also increasing year by year, so NO x Emission control is imperative. Flue gas denitrification is considered to be one of the most effective ways. The catalyst is the key in denitrification technology. The catalysts used in the current flue gas denitrification technology mainly include three types according to the different active components: noble metals, metal oxides and ion-exchange zeolite molecular sieves. In the commercialized flue gas denitrification catalysts, there are disadvantages of ...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J23/22B01J21/06B01D53/56
Inventor 胡国新赵宇
Owner SHANGHAI JIAO TONG UNIV
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