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Denitration catalyst and preparation method thereof

A denitration catalyst and catalyst technology, applied in the field of denitration catalysts, can solve the problems of ignoring sulfur oxides, decreasing thermal efficiency, clogging catalysts, etc., and achieve the effects of wide active temperature window, low conversion rate, and reduced adsorption and oxidation

Active Publication Date: 2013-08-21
安徽新高电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the denitrification catalysts in the prior art generally only focus on the catalytic efficiency of nitrogen oxides, while ignoring the other main pollutant sulfur oxides (mainly SO 2 and SO 3 )
The denitrification catalyst SO in the prior art 2 / SO 3 The conversion rate is generally 0.8%-1%. When ammonia is used as the reducing agent, it is easy to generate ammonium bisulfate, which will block the surface of the catalyst and corrode the downstream equipment, resulting in problems such as a decrease in thermal efficiency and an increase in pressure drop.

Method used

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  • Denitration catalyst and preparation method thereof
  • Denitration catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of composite catalyst

[0036] (0.8wt%V 2 O 5 -2wt% WO 3 -2wt%MoO 3 -0.2wt%CeO 2 / TiO 2 )

[0037] a) First heat 2.85kg of ionized water to 85°C, add 0.146kg of monoethanolamine and stir to dissolve, then add 0.328kg of ammonium tungstate, 0.612kg of ammonium molybdate and 0.163kg of ammonium metavanadate and stir to dissolve to make a light yellow solution .

[0038] b) 0.076 kg of cerium nitrate was dissolved in 0.060 kg of monoethanolamine solution to form a transparent solution, and then gradually added to the solution of the above step a to make a flocculent suspension.

[0039] c) Then slowly add 9.75 kg of anatase-type fine-grained titanium dioxide powder to the suspension in step b and stir while adding to make a viscous white thick slurry.

[0040] d) Add 1.95 kg of auxiliary materials and 1.8 kg of molding agent to the viscous white thick slurry obtained in step c and stir to obtain the prepared mixed...

Embodiment 2

[0045] Embodiment 2: the preparation of composite catalyst

[0046] (0.8wt%V 2 O 5 -2.5wt% WO 3 -2.5wt%MoO 3 -0.5wt%CeO 2 / TiO 2 )

[0047] a). First, heat 2.85kg of ionized water to 85°C, add 0.313kg of monoethanolamine and stir to dissolve, then add 0.36kg of ammonium tungstate, 0.765kg of ammonium molybdate and 0.163kg of ammonium metavanadate and stir to dissolve to make light yellow solution.

[0048] b). Dissolve 0.19 kg of cerium nitrate in 0.15 kg of monoethanolamine solution to form a transparent solution, then gradually add the solution in step a above to make a flocculent suspension.

[0049] c). Then slowly add 9.75 kg of anatase-type fine-grained titanium dioxide powder to the suspension in step b and stir while adding to make a viscous white thick slurry.

[0050] d). Add 1.95 kg of auxiliary materials and 1.8 kg of molding agent to the viscous white thick slurry obtained in step c and stir to obtain the prepared mixed material.

[...

Embodiment 3

[0055] Embodiment 3: the preparation of composite catalyst

[0056] (0.8wt%V 2 O 5 -3wt% WO 3 -3%wt%MoO 3 -1wt%CeO 2 / TiO 2 )

[0057] a). First heat 2.85kg of ionized water to 85°C, add 0.376kg of monoethanolamine and stir to dissolve, then add 0.492kg of ammonium tungstate, 0.918kg of ammonium molybdate and 0.163kg of ammonium metavanadate and stir to dissolve to make a light yellow solution.

[0058] b). Dissolve 0.38 kg of cerium nitrate in 0.30 kg of monoethanolamine solution to form a transparent solution, then gradually add the solution of the above step a to make a flocculent suspension.

[0059] c). Then slowly add 9.75 kg of anatase-type fine-grained titanium dioxide powder to the suspension in step b and stir while adding to make a viscous white thick slurry.

[0060] d). Then add 1.95kg of auxiliary materials and 1.8kg of molding agent to the viscous white thick slurry obtained in step c, and stir and mix to obtain the prepared mixed ...

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Abstract

The invention relates to a denitration catalyst, and particularly relates to a novel SCR denitration catalyst and a preparation method thereof. According to the catalyst, TiO2 serves as a carrier constituent, and V2O5, WO3, MoO3 and CeO2 serve as the active constituent. The denitration catalyst has the advantages that the SO2 / SO3 conversion rate is low, the denitration efficiency is high, the active temperature window is wide, the poison tolerance is strong, and the like.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a novel SCR denitration catalyst and a preparation method thereof. The catalyst is TiO 2 as the carrier component, with V 2 o 5 、WO 3 、MoO 3 and CeO 2 as the active ingredient, has SO 2 / SO 3 Low conversion rate, high denitrification efficiency, wide active temperature window, strong anti-poisoning ability and other high performance advantages. Background technique [0002] Nitrogen oxides (including NO, NO 2 , N 2 O is referred to as NO X ), is the main air pollutant today. NOx emissions into the air are likely to form acid rain and photochemical smog, destroy the ozone layer and cause the greenhouse effect, seriously endangering the natural environment and human health. Selective catalytic reduction (SCR) denitrification technology is currently the denitrification technology with the highest denitrification efficiency and the most market prospect, and has become the first c...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 吴庆祝王利亚周珮萱
Owner 安徽新高电气有限公司
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