Niobite type manganese-niobium-based SCR denitration catalyst and preparation method thereof

A denitration catalyst and niobium iron ore technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of unknown N2 selectivity, inability to achieve industrial applications, etc., and achieve good resistance to H2O and SO2 poisoning. performance, good denitrification performance, the effect of reducing harm

Active Publication Date: 2020-05-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst is a powder and cannot be applied industrially, and its N 2 selectivity unknown

Method used

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  • Niobite type manganese-niobium-based SCR denitration catalyst and preparation method thereof
  • Niobite type manganese-niobium-based SCR denitration catalyst and preparation method thereof

Examples

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Effect test

Embodiment example 1

[0027] A niobite-type manganese-niobium-based SCR denitrification catalyst and a preparation method thereof, wherein the catalyst includes an active component, a carrier and an auxiliary agent, and the active component comprises a niobite-type structure of MnNb 2 o 6 , MnO x , NbO x ; The carrier is TiO 2 ; The auxiliary agent is methyl cellulose, glycerin and tung oil;

[0028] The catalyst active component is denoted as Mn x Nb 1-x o z ; Among the active components, x=0.33; In terms of mass fraction, the active components in the catalyst account for 10 parts, the carrier accounts for 88.1 parts, the methyl cellulose accounts for 1 part, and glycerin accounts for 1 part. 0.3 parts, tung oil accounts for 0.6 parts;

[0029] Described preparation method comprises the following steps:

[0030] (1) Active component deployment: the precursors of Mn and Nb are mixed with deionized water in proportion to obtain a mixture;

[0031] (2) Loading and mixing: the mixture, carrie...

Embodiment example 2

[0039] A niobite-type manganese-niobium-based SCR denitrification catalyst and a preparation method thereof, wherein the catalyst includes an active component, a carrier and an auxiliary agent, and the active component comprises a niobite-type structure of MnNb 2 o 6 , MnO x , NbO x , oxide doped with Fe; the carrier is TiO 2 ; The auxiliary agent is methyl cellulose, glycerin and tung oil;

[0040] The catalyst active component is denoted as Mn x Nb 1-x-y m y o z , M represents Fe; x=0.25, y=0.1 in the described active component; In terms of mass fraction, the active component in the catalyst accounts for 18 parts, the carrier accounts for 80 parts, and the methyl Cellulose accounts for 1 part, glycerin accounts for 0.5 parts, and tung oil accounts for 0.5 parts;

[0041] Described preparation method comprises the following steps:

[0042] (1) Active component deployment: Mn, Nb, Fe precursors are mixed with deionized water in proportion to obtain a mixture;

[0043...

Embodiment example 3

[0052] A niobite-type manganese-niobium-based SCR denitrification catalyst and a preparation method thereof, wherein the catalyst includes an active component, a carrier and an auxiliary agent, and the active component comprises a niobite-type structure of MnNb 2 o 6 , MnO x , NbO x , an oxide doped with Co; the support is TiO 2 ; The auxiliary agent is methyl cellulose, glycerin and tung oil;

[0053] The catalyst active component is denoted as Mn x Nb 1-x-y m y o z , M represents Co; x=0.26, y=0.95 in the described active component; In terms of mass fraction, the active component in the catalyst accounts for 17 parts, the carrier accounts for 80 parts, and the methyl Cellulose accounts for 2 parts, glycerin accounts for 0.4 parts, and tung oil accounts for 0.6 parts;

[0054] Described preparation method comprises the following steps:

[0055] (1) Active component deployment: the precursors of Mn, Nb, and Co are mixed with deionized water in proportion to obtain a m...

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Abstract

The invention discloses a niobite type manganese-niobium-based SCR denitration catalyst and a preparation method thereof, and belongs to the field of environmental materials. The catalyst comprises anactive component, a carrier and auxiliary agents, wherein the active component comprises MnNb2O6, MnOx and NbOx having a niobite type structure, and one or more of oxides of Fe, Co, Ce, La, V, W andMo can be doped into the active component; the carrier is one or more of TiO2, ZrO2, SiO2, Al2O3, zeolite and cordierite; the auxiliary agents are methyl cellulose, glycerol and tung oil. The preparation method of the catalyst comprises the processes of active component blending, loading and mixing, forming and calcining. The catalyst is simple in preparation process and excellent in performance,the NOx conversion rate is not lower than 90% at the temperature of 100-400 DEG C, the N2 selectivity is not lower than 95% at the temperature of 100-400 DEG C, and the catalyst has excellent H2O andSO2 poisoning resistance.

Description

technical field [0001] The invention relates to the field of environmental materials, and specifically relates to a niobite-type manganese-niobium-based selective catalytic reduction (SCR) denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is mainly derived from the use of fossil fuels and is the primary air pollutant in my country, which can cause various forms of air pollution. SCR technology is currently the most widely used technology in the field of industrial flue gas denitrification, mainly using vanadium-based denitrification catalysts. The vanadium-based catalyst has a high working temperature, and high concentrations of dust and SO in the high-temperature flue gas 2 , heavy metals and other harmful substances lead to shortened catalyst life. The low-temperature SCR technology installs the reactor after the dust removal and desulfurization device, avoiding the damage of high-concentration dust and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/889B01D53/50B01D53/86B01D53/56
CPCB01D53/8609B01D53/8628B01J23/34B01J23/8892
Inventor 张深根张柏林刘波
Owner UNIV OF SCI & TECH BEIJING
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