Flue gas denitrating integral catalyst with titanium base ceramic as carrier and preparation thereof

A monolithic catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve strong water vapor resistance, simple preparation process, and good thermal stability

Active Publication Date: 2010-12-08
SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few domestic patents on flue gas denitrification catalysts

Method used

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  • Flue gas denitrating integral catalyst with titanium base ceramic as carrier and preparation thereof
  • Flue gas denitrating integral catalyst with titanium base ceramic as carrier and preparation thereof
  • Flue gas denitrating integral catalyst with titanium base ceramic as carrier and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (3) Preparation of active component impregnation solution

[0034] 12gCe(NO 3 ) 3 .6H 2 Ce(NO 3 ) 3 solution;

[0035] (4) Active CeO 2 load

[0036] Coated TiO in step (2) 2 -ZrO 2The sample of the second carrier coating of the composite oxide is immersed in the solution prepared in step (3). After the immersion, the residual solution in the channel is blown out, and after 24 hours of natural shade drying, it is baked at 500° C. in a muffle furnace for 3 hours, and repeated. Impregnated, dried and calcined once until the required carrier load is reached, that is, the active CeO 2 The coating, based on the mass of the first carrier, has a mass percentage of 12.7%.

[0037] Example 2

[0038] (1) TiO 2 -ZrO 2 Composite sol preparation

[0039] First, stir 17ml butyl titanate and 25ml absolute ethanol to prepare liquid A, then add 12ml glacial acetic acid, 5ml water, and 30ml absolute ethanol in order to prepare liquid B, then add liquid A dropwise to liquid...

Embodiment 2

[0042] (3) Preparation of active component impregnation solution

[0043] 12g Ce(NO 3 ) 3 .6H 2 Ce(NO 3 ) 3 solution;

[0044] (4) Active CeO 2 load

[0045] Coated TiO in step (2) 2 -ZrO 2 The sample of the second carrier coating of the composite oxide is immersed in the solution prepared in step (3). After the immersion, the residual solution in the channel is blown away, dried in a blast drying oven at 80°C for 10 hours, and then passed through a muffle furnace at 500°C. Roast for 3 hours, repeat impregnation, drying and roasting once until the required carrier load is reached, that is, the active CeO 2 The coating, based on the mass of the first carrier, has a mass percentage of 10.5%.

[0046] Example 3

[0047] (1) TiO 2 -ZrO 2 Composite sol preparation

[0048] First, stir 17ml butyl titanate and 25ml absolute ethanol to prepare liquid A, then add 12ml glacial acetic acid, 5ml water, and 30ml absolute ethanol in order to prepare liquid B, then add liquid A...

Embodiment 3

[0051] (3) Preparation of active component impregnation solution

[0052] 12g Ce(NO 3 ) 3 .6H 2 Ce(NO 3 ) 3 solution;

[0053] (4) Active CeO 2 load

[0054] Coated TiO in step (2) 2 -ZrO 2 The sample of the second carrier coat of the composite oxide is immersed in the solution prepared in step (3). ℃ calcination for 3 hours, repeat impregnation, drying and calcination once until the required carrier load is reached, that is, the active CeO 2 The coating, based on the mass of the first carrier, has a mass percentage of 10.2%.

[0055] Example 4

[0056] (1) TiO 2 -ZrO 2 Composite sol preparation

[0057] First, stir 17ml butyl titanate and 25ml absolute ethanol to prepare liquid A, then add 12ml glacial acetic acid, 5ml water, and 30ml absolute ethanol in order to prepare liquid B, then add liquid A dropwise to liquid B , stirred for 20 minutes, then added 6.0 g of zirconium oxychloride and stirred for 40 minutes to obtain a titanium-zirconium mixed sol.

[005...

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Abstract

The invention relates to a flue gas denitration integral type catalyst using a titanium-based ceramic as a carrier and a preparation method thereof. The invention is characterized in that the titanium-based ceramic is used as a first carrier, a zirconium titanate composite metal oxide is used as a second carrier, and CeO2 which is added with proper amounts of doped metal oxides is used as an active constituent. The quality of the first carrier is used as a benchmark, wherein the load content mass percentage of the zirconium titanate composite metal oxide is 2.5 to 40wt percent and the load content mass percentage of the CeO2 and the doped metal oxides which is used as the active constituent is 1 to 25wt percent. The adopted preparation method is to impregnate the Ce salt and the doped metal salt composite solution to prepare an active catalytic component coating after impregnating the titanium-based ceramic with a zirconium titanate composite sol and being roasted driedly to prepare acarrier coating. Compared with the prior art, the flue gas denitration integral type catalyst and the preparation method thereof not only improve the activity of the catalyst and expand a window of activity temperature in a low temperature, but also improve mechanicalness and the heat stability of the catalyst carrier. The flue gas denitration integral type catalyst and the preparation method areenvironmental protection, without a secondary pollution and reduce the loading of the active constituent.

Description

technical field [0001] The invention relates to a monolithic flue gas denitrification catalyst with titanium-based ceramics as a carrier and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] Among the numerous flue gas denitrification methods, selective catalytic reduction (SCR) denitrification technology has been widely used because of its high denitrification efficiency. At present, the SCR denitrification equipment of large and medium-sized thermal power plants in my country is all imported, and the price is very expensive (the denitrification catalyst for a 600MW unit costs about 40 million and needs to be replaced every two years). Flue gas denitrification catalysts without independent intellectual property rights have become my country's environmental protection The "coreless pain" in the field. Commercial SCR denitration catalysts are mainly V 2 o ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J21/06B01J37/025B01D53/56
Inventor 祝社民沈岳松
Owner SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
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