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A kind of supported low-temperature SCR denitrification catalyst and preparation method thereof

A denitration catalyst, supported technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as performance degradation, N2 selectivity influence, etc. and H2O performance, the effect of broadening the operating temperature window

Active Publication Date: 2019-12-13
JIANGSU LONGKING COALOGIX CATALYST REGENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of processing powder catalyst into components, its performance will be greatly reduced, and the N 2 Selectivity will be affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A supported low-temperature SCR flue gas denitrification catalyst, whose carrier is composed of Ti-Zr composite oxide and carbon fiber, whose active component is mainly composed of V-Mn composite metal oxide, and is doped with the oxide of Ce element. Ti / (Ti+Zr)=0.4 in the carrier, ZrTiO 4 The mass fraction of carbon fiber is 75 wt%, carbon fiber is 6 wt%; V / (V+Mn)=0.5 in the active component, Mn 2 V 5 o 7 The mass fraction of MnO is 55 wt%. x is 23 wt%, and the mole fraction of CeO is 18%. The catalyst active component accounts for 0.1 wt% of the total mass of the catalyst. A preparation method of a supported low-temperature SCR flue gas denitrification catalyst, including a carrier preparation method and an active component loading method,

[0028] Said preparation of carrier stock, and extrusion molding, its steps are as follows:

[0029] Prepare the Ti and Zr nitrate solution according to Ti / (Ti+Zr)=0.4, stir and adjust the pH value to make the precipitation c...

Embodiment 2

[0034] A supported low-temperature SCR flue gas denitrification catalyst, whose carrier is composed of Ti-Zr composite oxide and carbon fiber, and whose active component is mainly composed of V-Mn composite metal oxide, and is doped with oxide of Cu element. Ti / (Ti+Zr)=0.5 in the carrier, ZrTiO 4 The mass fraction of carbon fiber is 92 wt%, carbon fiber is 5 wt%; V / (V+Mn)=0.6 in the active component, Mn 2 V 5 o 7 The mass fraction of MnO is 65 wt%. x is 18 wt%, and the mole fraction of CuO is 10%. The catalyst active component accounts for 1 wt% of the total mass of the catalyst. A preparation method of a supported low-temperature SCR flue gas denitrification catalyst, including a carrier preparation method and an active component loading method,

[0035] Said preparation of carrier stock, and extrusion molding, its steps are as follows:

[0036] Prepare the Ti and Zr nitrate solution according to Ti / (Ti+Zr)=0.5, stir and adjust the pH value to make the precipitation com...

Embodiment 3

[0041] A supported low-temperature SCR flue gas denitrification catalyst, whose carrier is composed of Ti-Zr composite oxide and carbon fiber, and whose active component is mainly composed of V-Mn composite metal oxide, and is doped with oxide of Fe element. Ti / (Ti+Zr)=0.6 in the carrier, ZrTiO 4 The mass fraction of carbon fiber is 75 wt%, carbon fiber is 4 wt%; V / (V+Mn)=0.7 in the active component, Mn 2 V 5 o 7 The mass fraction of MnO is 85 wt%. x 2 wt%, FeO x The mole fraction of is 7%. The active components of the catalyst accounted for 3 wt% of the total mass of the catalyst. A preparation method of a supported low-temperature SCR flue gas denitrification catalyst, including a carrier preparation method and an active component loading method,

[0042] Said preparation of carrier stock, and extrusion molding, its steps are as follows:

[0043] Prepare Ti and Zr nitrate solution according to Ti / (Ti+Zr)=0.6, stir and adjust the pH value to complete the precipitation,...

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PUM

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Abstract

The invention belongs to the technical field of flue gas denitration of coal-fired boilers and particularly relates to a supported low-temperature SCR (Selective Catalytic Reduction) denitrification catalyst and a preparation method thereof. The low-temperature SCR flue gas denitrification catalyst is prepared from carriers and active ingredients, wherein the carriers comprise Ti-Zr composite oxide and carbon fibers; the active ingredients mainly comprise V-Mn composite metal oxide and is doped with any one or oxides of any two or more of Ce, Cu, Fe, Co, W and Mo. The catalyst has the advantages of great specific area, high adsorptive capacity, good corrosion resistance, low possibility of breaking and good properties of resisting SO2 and H2O; the conversion rate of NOx at the temperatureof 130 to 460 DEG C reaches 95 percent, and the selectivity of N2 reaches 98 percent.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification of coal-fired boilers, and in particular relates to a load-type low-temperature SCR denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants produced during the combustion of fossil fuels, which can lead to various atmospheric environmental problems such as photochemical pollution, acid rain, and ozone hole. In 2014, the world's total coal output was 8.165 billion tons, and NOx was emitted during the use of coal energy x 60 million tons. Effective control of NO x Emissions are a global issue. Currently the most widely used technology is Selective Catalytic Reduction (SCR), and low temperature (100-250°C) SCR technology is expected to replace traditional SCR technology. The low-temperature SCR technology installs the reactor after the desulfurization and dust removal device, which avoids the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/889B01J37/02B01J35/10B01D53/86B01D53/56
Inventor 张深根张柏林刘波
Owner JIANGSU LONGKING COALOGIX CATALYST REGENERATION CO LTD
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