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A kind of denitrification catalyst and preparation method thereof

A denitration catalyst and fe2o3 technology are applied in the field of flue gas denitration catalyst and its preparation, which can solve the problems of low denitration efficiency and narrow reaction temperature range, and achieve the effects of large specific surface area, wide reaction temperature window and enhanced low temperature performance.

Active Publication Date: 2017-11-03
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of existing catalysts such as low denitrification efficiency in the low temperature range and narrow reaction temperature range, and provide a catalyst with a wide reaction temperature window and excellent NO x Denitrification catalyst with high removal rate and preparation method thereof

Method used

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  • A kind of denitrification catalyst and preparation method thereof
  • A kind of denitrification catalyst and preparation method thereof
  • A kind of denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The steps of preparing the denitration catalyst in this embodiment are as follows:

[0022] Step 1: Weigh 0.01mol of Ce(NO 3 ) 3 •6H 2 O, 0.003mol of Fe(NO 3 ) 3 •9H 2 O, 0.005mol La(NO 3 ) 3 •6H 2 O was dissolved step by step in 10 ml of distilled water, placed on a magnetic stirrer and stirred to accelerate dissolution;

[0023] Step 2: Measure 0.1mol tetrabutyl titanate and 0.2mol absolute ethanol in a beaker and mix;

[0024] Step 3: Slowly add the solution prepared in step 1 to the solution prepared in step 2, and stir on a magnetic stirrer to form a colloid;

[0025] Step 4: Dry the colloid in a blast drying oven at 105 °C for 10 h, and bake the dried sample at 450 °C in a program-controlled muffle furnace for 5 h; take it out and grind it into a 40-60 mesh powder to obtain powdered CeO 2 -Fe 2 o 3 -La 2 o 3 / TiO 2 catalyst. The molar ratio of each component of the catalyst is: CeO 2 : Fe 2 o 3 :La 2 o 3 :TiO 2 =10:3:5:100.

[0026] The cata...

Embodiment 2

[0029] The steps of preparing the denitration catalyst in this embodiment are as follows:

[0030] Step 1: Weigh 0.015mol of Ce(NO 3 ) 3 •6H 2 O, 0.003mol of Fe(NO 3 ) 3 •9H 2 O, 0.01mol La(NO 3 ) 3 •6H 2 O was dissolved step by step in 10 ml of distilled water, placed on a magnetic stirrer and stirred to accelerate dissolution;

[0031] Step 2: Measure 0.1mol tetrabutyl titanate, 0.001mol glacial acetic acid and 0.45mol absolute ethanol in a beaker and mix;

[0032]Step 3: Slowly add the solution prepared in step 1 to the solution prepared in step 2, and stir on a magnetic stirrer to form a colloid;

[0033] Step 4: Dry the colloid in a blast drying oven at 115 °C for 14 h, and bake the dried sample in a programmable muffle furnace at 600 °C for 7 h; take it out and grind it into a 40-60 mesh powder to obtain powdered CeO 2 -Fe 2 o 3 -La 2 o 3 / TiO 2 catalyst. The molar ratio of each component of the catalyst is: CeO 2 : Fe 2 o 3 :La 2 o 3 :TiO 2 =15:3:1...

Embodiment 3

[0037] The steps of preparing the denitration catalyst in this embodiment are as follows:

[0038] Step 1: Weigh 0.012mol of Ce(NO 3 ) 3 •6H 2 O, 0.003mol of Fe(NO 3 ) 3 •9H 2 O, 0.007mol of La(NO 3 ) 3 •6H 2 O was dissolved step by step in 10 ml of distilled water, placed on a magnetic stirrer and stirred to accelerate dissolution;

[0039] Step 2: Take 0.1mol tetrabutyl titanate, 0.001mol glacial acetic acid, and 0.3mol absolute ethanol in a beaker and mix them;

[0040] Step 3: Slowly add the solution prepared in step 1 to the solution prepared in step 2, and stir on a magnetic stirrer to form a colloid;

[0041] Step 4: Dry the colloid in a blast drying oven at 110 °C for 12 h, and bake the dried sample at 500 °C in a program-controlled muffle furnace for 6 h; take it out and grind it into a 40-60 mesh powder to obtain powdered CeO 2 -Fe 2 o 3 -La 2 o 3 / TiO 2 catalyst. The molar ratio of each component of the catalyst is: CeO 2 : Fe 2 o 3 :La 2 o 3 :T...

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Abstract

The invention discloses a denitration catalyst and a preparation method thereof. Its components include CeO2, Fe2O3, La2O3 and TiO2, and the molar ratio of the components is: CeO2:Fe2O3:La2O3:TiO2=10~15:3:5~10:100. The preparation method includes the following steps: (1) weighing 10-15 parts of Ce(NO3)3•6H2O, 3 parts of Fe(NO3)3•9H2O and 5-10 parts of La(NO3)3 • Dissolve 6H2O in distilled water to obtain the first solution; (2) Weigh 100 molar parts of tetrabutyl titanate and 200-450 parts of absolute ethanol and mix to obtain the second solution; (3) The first solution is slowly added into the second solution and stirred to obtain a colloid; (4) drying and roasting the colloid to obtain the denitration catalyst. The catalyst of the invention has good low-temperature performance and high catalytic activity, and has a wide reaction temperature window.

Description

technical field [0001] The invention belongs to the field of flue gas catalytic purification, and relates to a flue gas denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is an important air pollutant that can cause acid rain and photochemical smog, destroy the ecological environment, and seriously endanger human health. How to effectively reduce NO x has great significance. [0003] Take NH 3 Selective Catalytic Reduction (SCR) for Reductant NO Removal x technology has been industrialized. The commonly used commercial catalysts are vanadium-based catalysts (such as V 2 o 5 / TiO 2 and V 2 o 5 -WO 3 / TiO 2 etc.), the working temperature of the catalyst is 300~400 °C, and when the temperature is lower than 300 °C, the catalytic activity is low. V 2 o 5 With strong oxidizing properties, it is easy to remove SO in boiler flue gas 2 Oxidation to SO 3 , while SO 3 Easy to react with NH at lower tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10
Inventor 张光学周安琪范海燕王进卿池作和
Owner CHINA JILIANG UNIV