V2O5-Sb2(SO4)3/TiO2 low-temperature SCR (selective catalytic reduction) denitration catalyst and preparation method thereof

A denitration catalyst, v2o5-sb2 technology, applied in the field of denitration catalysts, can solve the problem of reducing denitration activity, and achieve the effects of inhibiting the conversion of SO2 to SO3, good selectivity, excellent low-temperature sulfur resistance and reproducibility

Inactive Publication Date: 2018-04-17
LONGYAN ZIJIN INNOVATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After the low-temperature catalyst has been operated for a period of time under the condition of sulfur-containing flue gas, even if it has excellent sulfur resistance, the catalyst will reduce the denitrification activity due to the formation of ammonium sulfate salt covering the active center

Method used

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  • V2O5-Sb2(SO4)3/TiO2 low-temperature SCR (selective catalytic reduction) denitration catalyst and preparation method thereof
  • V2O5-Sb2(SO4)3/TiO2 low-temperature SCR (selective catalytic reduction) denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 Low-temperature SCR denitration catalyst, the content of each component of the denitration catalyst is as follows:

[0047] active ingredient V 2 o 5 1wt%;

[0048] Auxiliary Sb 2 (SO 4 ) 3 1wt%;

[0049] Carrier TiO 2 98wt%.

[0050] above V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 The preparation method of low-temperature SCR denitration catalyst comprises the following steps:

[0051] 1) Sb 2 (SO 4 ) 3 / TiO 2 Preparation of powder: Dissolve 1.46kg of antimony lactate in water, add 98kg of titanium dioxide, stir and add 2mol / L dilute sulfuric acid to the solution dropwise, the molar ratio of antimony lactate to dilute sulfuric acid is n 乳酸锑 :n 稀硫酸 The ratio is 1:2; after standing for 6 hours, suction filtration is obtained to obtain a precipitate; the precipitate is dried at 100°C for 36 hours to obtain Sb 2 (SO 4 ) 3 / TiO 2 Powder;

[0052] 2) Preparation of active liquid: Dissolve monoethanolammonium in water, ad...

Embodiment 2

[0058] a V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 Low-temperature SCR denitration catalyst, the content of each component of the denitration catalyst is as follows:

[0059] active ingredient V 2 o 5 5wt%;

[0060] Auxiliary Sb 2 (SO 4 ) 3 5wt%;

[0061] Carrier TiO 2 90wt%.

[0062] above V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 The preparation method of low-temperature SCR denitration catalyst comprises the following steps:

[0063] 1) Sb 2 (SO 4 ) 3 / TiO 2 Preparation of powder: Dissolve 7.32kg of antimony lactate in water, add 90kg of titanium dioxide, stir and add 1mol / L dilute sulfuric acid to the solution dropwise, the molar ratio of antimony lactate to dilute sulfuric acid is n 乳酸锑 :n 稀硫酸 The ratio is 1:3; after standing for 10 hours, suction filtration is obtained to obtain a precipitate; the precipitate is dried at 140°C for 12 hours to obtain Sb 2 (SO 4 ) 3 / TiO 2 Powder;

[0064] 2) Preparation of active liquid: Dissolve monoethanolammonium in water, a...

Embodiment 3

[0070] a V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 Low-temperature SCR denitration catalyst, the content of each component of the denitration catalyst is as follows:

[0071] active ingredient V 2 o 5 3wt%;

[0072] Auxiliary Sb 2 (SO 4 ) 3 3wt%;

[0073] Carrier TiO 2 94wt%.

[0074] above V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 The preparation method of low-temperature SCR denitration catalyst comprises the following steps:

[0075] 1) Sb 2 (SO 4 ) 3 / TiO 2 Preparation of powder: Dissolve 4.38kg of antimony lactate in water, add 94kg of titanium dioxide, stir and add 1.5mol / L dilute sulfuric acid to the solution dropwise, the molar ratio of antimony lactate to dilute sulfuric acid is n 乳酸锑 :n 稀硫酸 The ratio is 1:4; after standing for 7 hours, suction filtration is obtained to obtain a precipitate; the precipitate is dried at 110°C for 18 hours to obtain Sb 2 (SO 4 ) 3 / TiO 2 Powder;

[0076] 2) Preparation of active liquid: Dissolve monoethanolammonium in water, ...

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Abstract

The invention provides a V2O5-Sb2(SO4)3 / TiO2 low-temperature SCR (selective catalytic reduction) denitration catalyst. The denitration catalyst is prepared from components as follows: 1wt%-5wt% of anactive component V2O5, 1wt%-5wt% of an auxiliary Sb2(SO4)3 and 90wt%-98wt% of a carrier TiO2. The invention further provides a preparation method of the denitration catalyst. The preparation method comprises steps as follows: 1), preparation of Sb2(SO4)3 / TiO2 powder; 2), preparation of an activated solution; 3), preparation of coarsely mixed mud; 4), preparation of finely mixed mud; 5), aging, decaying and molding; 6), drying and calcining. The prepared denitration catalyst has advantages of high activity, high sulfur tolerance and high reproducibility.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a V 2 o 5 -Sb 2 (SO 4 ) 3 / TiO 2 A low-temperature SCR denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is NO, NO 2 and N 2 The general term for nitrogen oxides such as O, mainly from thermal power plants, industrial thermal equipment and motor vehicle exhaust. NO x It can cause ozone layer depletion, cause human respiratory diseases, greenhouse effect and acid rain, etc. In addition, NO in the atmosphere x It is also the main culprit of photochemical smog. Among many denitrification technologies, NH 3 -SCR has become a fixed source of NO removal due to its economy and high efficiency x mainstream technology. [0003] V of traditional business 2 o 5 -WO 3 (MoO 3 ) / TiO 2 The denitrification temperature window is 300-400°C. In order to avoid repeated heating of the flue gas, the reactor is generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053B01D53/86B01D53/56
Inventor 林啟维胡建锋吴晓东石磊陈勇林荣贵温明英
Owner LONGYAN ZIJIN INNOVATION RES INST
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